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1. Plasmonic Color-Graded Nanosystems with Achromatic Subwavelength Architectures for Light Filtering and Advanced SERS Detection

Author:
Proietti Zaccaria, Remo; Bisio, Francesco; Das, Gobind; Maidecchi, Giulia; Caminale, Michael; Vu, Chinh Duc; De Angelis, Francesco; Di Fabrizio, Enzo; Toma, Andrea; Canepa, Maurizio
Source:
ACS applied materials & interfaces 2016 v.8 no.12 pp. 8024-8031
ISSN:
1944-8252
Subject:
Raman spectroscopy; color; electronic circuits; filters; geometry; wavelengths
Abstract:
... Plasmonic color-graded systems are devices featuring a spatially variable plasmonic response over their surface. They are widely used as nanoscale color filters; their typical size is small enough to allow integration with miniaturized electronic circuits, paving the way to realize novel nanophotonic devices. Currently, most plasmonic color-graded systems are intrinsically discrete because their c ...
DOI:
10.1021/acsami.6b00726

2. Layer Control of Tubular Graphene for Corrosion Inhibition of Nickel Wires

Author:
Nguyen, An T.; Lai, Wei-Cheng; To, Bao Dong; Nguyen, Duc Dung; Hsieh, Ya-Ping; Hofmann, Mario; Kan, Hung-Chih; Hsu, Chia-Chen
Source:
ACS applied materials & interfaces 2017 v.9 no.27 pp. 22911-22917
ISSN:
1944-8252
Subject:
Raman spectroscopy; annealing; cellulose acetate; coatings; corrosion; diameter; durability; electrochemistry; electrodes; graphene; models; nickel; scanning electron microscopy; thermal stability
Abstract:
... Corrosion protection of complex surface is an active area of research due to its importance to commercial applications such as electrochemical fabrication. However, conventional coatings exhibit limited conductivity, thermal stability, and durability and are thus not suitable. Recent work has shown the potential of graphene, a two-dimensional carbon allotrope, for corrosion protection. The studies ...
DOI:
10.1021/acsami.7b04381

3. Fabrication and Characterization of Surfaces Modified with Carboxymethylthio Ligands for Chelate-Assisted Trapping of Copper

Author:
Adongo, John O.; Neubert, Tilmann J.; Sun, Guoguang; Janietz, Silvia; Lauermann, Iver; Rademann, Klaus; Rappich, Jörg
Source:
ACS applied materials & interfaces 2017 v.9 no.28 pp. 24273-24281
ISSN:
1944-8252
Subject:
Raman spectroscopy; X-ray photoelectron spectroscopy; chelation; copper; diazonium compounds; electrochemistry; gold; infrared spectroscopy; ligands; quartz crystal microbalance; silicon
Abstract:
... The metal ion chelating property was conferred onto silicon (Si) and gold (Au) surfaces by direct electrografting of the 4-[(carboxymethyl)thio]benzenediazonium cation (4-CMTBD). Infrared spectroscopic ellipsometry showed the presence of characteristic phenyl and carbonyl vibrational bands on the functionalized surfaces as a proof of existence of surface-bound organic units of 4-[(carboxymethyl)th ...
DOI:
10.1021/acsami.7b05131

4. V2O5: A 2D van der Waals Oxide with Strong In-Plane Electrical and Optical Anisotropy

Author:
Sucharitakul, Sukrit; Ye, Gaihua; Lambrecht, Walter R. L.; Bhandari, Churna; Gross, Axel; He, Rui; Poelman, Hilde; Gao, Xuan P. A.
Source:
ACS applied materials & interfaces 2017 v.9 no.28 pp. 23949-23956
ISSN:
1944-8252
Subject:
Raman spectroscopy; ambient temperature; anisotropy; batteries; crystal structure; electrodes; optical properties; oxides; van der Waals forces; vanadium
Abstract:
... V₂O₅ with a layered van der Waals (vdW) structure has been widely studied because of the material’s potential in applications such as battery electrodes. In this work, microelectronic devices were fabricated to study the electrical and optical properties of mechanically exfoliated multilayered V₂O₅ flakes. Raman spectroscopy was used to determine the crystal structure axes of the nanoflakes and re ...
DOI:
10.1021/acsami.7b05377

5. Adhesion Enhancements and Surface-Enhanced Raman Scattering Activity of Ag and Ag@SiO2 Nanoparticle Decorated Ragweed Pollen Microparticle Sensor

Author:
Johnstone, Lucas R.; Gomez, Ismael J.; Lin, Haisheng; Fadiran, Oluwatimilehin O.; Chen, Vincent W.; Meredith, J. Carson; Perry, Joseph W.
Source:
ACS applied materials & interfaces 2017 v.9 no.29 pp. 24804-24811
ISSN:
1944-8252
Subject:
Ambrosia; Raman spectroscopy; adhesion; coatings; exine; fluorescence; microparticles; nanoparticles; nanosilver; near-infrared spectroscopy; pH; pollen; sensors (equipment); silane; silicon; silver
Abstract:
... A simple solution processed layer-by-layer approach was used to immobilize metal nanoparticles (NPs) on the surface of ragweed pollen exine to obtain multifunctional particles with significant surface-enhanced Raman scattering (SERS), two-photon excited fluorescence, and enhanced adhesion properties. The rugged pollen exine was functionalized with an amine terminated silane and then treated with A ...
DOI:
10.1021/acsami.6b15664

6. Restoring the Electrical Properties of CVD Graphene via Physisorption of Molecular Adsorbates

Author:
Thodkar, Kishan; Thompson, Damien; Lüönd, Felix; Moser, Lucas; Overney, Frédéric; Marot, Laurent; Schönenberger, Christian; Jeanneret, Blaise; Calame, Michel
Source:
ACS applied materials & interfaces 2017 v.9 no.29 pp. 25014-25022
ISSN:
1944-8252
Subject:
Raman spectroscopy; X-ray photoelectron spectroscopy; adsorbents; computer simulation; electrical properties; graphene; oxygen; quantum mechanics; silicon; solvents; vapors
Abstract:
... Chemical vapor deposition (CVD) is a powerful technique to produce graphene for large-scale applications. Polymer-assisted wet transfer is commonly used to move the graphene onto silicon substrates, but the resulting devices tend to exhibit p-doping, which decreases the device quality and reproducibility. In an effort to better understand the origin of this effect, we coated graphene with n-methyl ...
DOI:
10.1021/acsami.7b05143

7. Investigation of Mass-Produced Substrates for Reproducible Surface-Enhanced Raman Scattering Measurements over Large Areas

Author:
Reyer, Andreas; Prinz, Adrian; Giancristofaro, Stefano; Schneider, Johannes; Bertoldo Menezes, Durval; Zickler, Gregor; Bourret, Gilles R.; Musso, Maurizio E.
Source:
ACS applied materials & interfaces 2017 v.9 no.30 pp. 25445-25454
ISSN:
1944-8252
Subject:
Raman spectroscopy; cost effectiveness; manufacturing; microstructure; nanosilver; polymers; production technology; silver
Abstract:
... Surface-enhanced Raman scattering (SERS) is a versatile spectroscopic technique that suffers from reproducibility issues and usually requires complex substrate fabrication processes. In this article, we report the use of a simple mass production technology based on Blu-ray disc manufacturing technology to prepare large area SERS substrates (∼40 mm²) with a high degree of homogeneity (±7% variation ...
DOI:
10.1021/acsami.7b06002

8. Surface-Enhanced, Spatially Offset Raman Spectroscopy (SESORS) in Tissue Analogues

Author:
Asiala, Steven M.; Shand, Neil C.; Faulds, Karen; Graham, Duncan
Source:
ACS applied materials & interfaces 2017 v.9 no.30 pp. 25488-25494
ISSN:
1944-8252
Subject:
Raman spectroscopy; glass; monitoring; nanoparticles
Abstract:
... Surface-enhanced, spatially offset Raman spectroscopy (SESORS) combines the remarkable enhancements in sensitivity afforded by surface-enhanced Raman spectroscopy (SERS) with the non-invasive, subsurface sampling capabilities of spatially offset Raman spectroscopy. Taken together, these techniques show great promise for in vivo Raman measurements. Herein, we present a step forward for this techniq ...
DOI:
10.1021/acsami.7b09197

9. Gold-Embedded Hollow Silica Nanogolf Balls for Imaging and Photothermal Therapy

Author:
Janetanakit, Woraphong; Wang, Liping; Santacruz-Gomez, Karla; Landon, Preston B.; Sud, Paul L.; Patel, Nirav; Jang, Grace; Jain, Malvika; Yepremyan, Alice; Kazmi, Sami A.; Ban, Deependra K.; Zhang, Feng; Lal, Ratnesh
Source:
ACS applied materials & interfaces 2017 v.9 no.33 pp. 27533-27543
ISSN:
1944-8252
Subject:
Raman spectroscopy; atomic force microscopy; cell death; electron microscopy; endocytosis; erythrocytes; fluorescence microscopy; image analysis; nanocarriers; nanogold; nanomedicine; polystyrenes; quantum dots; silica; surface plasmon resonance; ultraviolet-visible spectroscopy; zeta potential
Abstract:
... Hybrid nanocarriers with multifunctional properties have wide therapeutic and diagnostic applications. We have constructed hollow silica nanogolf balls (HGBs) and gold-embedded hollow silica nanogolf balls (Au@SiO₂ HGBs) using the layer-by-layer approach on a symmetric polystyrene (PS) Janus template; the template consists of smaller PS spheres attached to an oppositely charged large PS core. ζ Po ...
DOI:
10.1021/acsami.7b08398

10. Dual Functional Ta-Doped Electrospun TiO2 Nanofibers with Enhanced Photocatalysis and SERS Detection for Organic Compounds

Author:
Singh, Narendra; Prakash, Jai; Misra, Mrinmoy; Sharma, Ashutosh; Gupta, Raju Kumar
Source:
ACS applied materials & interfaces 2017 v.9 no.34 pp. 28495-28507
ISSN:
1944-8252
Subject:
Raman spectroscopy; absorption; electron transfer; energy; ions; irradiation; methylene blue; nanofibers; phase transition; photocatalysis; porous media; solar radiation; surface area; tantalum; titanium dioxide
Abstract:
... There is a growing interest in multifunctional nanomaterials for the detection as well as degradation of organic contaminants in the water. In this work, we report on the development of dual functional TiO₂ nanofibers (TNF) with different tantalum (Ta) doping (1–10 mol %) by a simple electrospinning technique. As-prepared TNF show mesoporous dominant structure, which are favorable for photocatalyt ...
DOI:
10.1021/acsami.7b07571

11. Fe-MoS4: An Effective and Stable LDH-Based Adsorbent for Selective Removal of Heavy Metals

Author:
Jawad, Ali; Liao, Zhuwei; Zhou, Zhihua; Khan, Aimal; Wang, Ting; Ifthikar, Jerosha; Shahzad, Ajmal; Chen, Zhulei; Chen, Zhuqi
Source:
ACS applied materials & interfaces 2017 v.9 no.34 pp. 28451-28463
ISSN:
1944-8252
Subject:
Fourier transform infrared spectroscopy; Raman spectroscopy; X-radiation; X-ray diffraction; X-ray photoelectron spectroscopy; absorbents; adsorbents; anions; arsenic; binding sites; cations; chromium; cobalt; copper; heavy metals; lead; mercury; nickel; oxidation; scanning electron microscopy; silver; sorption; sorption isotherms; zinc
Abstract:
... It has always been a serious challenge to design efficient, selective, and stable absorbents for heavy-metal removal. Herein, we design layered double hydroxide (LDH)-based Fe-MoS₄, a highly efficient adsorbent, for selective removal of heavy metals. We initially synthesized FeMgAl-LDH and then enriched its protective layers with MoS₄²– anions as efficient binding sites for heavy metals. Various c ...
DOI:
10.1021/acsami.7b07208

12. Highly Uniform Anodically Deposited Film of MnO2 Nanoflakes on Carbon Fibers for Flexible and Wearable Fiber-Shaped Supercapacitors

Author:
Rafique, Amjid; Massa, Andrea; Fontana, Marco; Bianco, Stefano; Chiodoni, Angelica; Pirri, Candido F.; Hernández, Simelys; Lamberti, Andrea
Source:
ACS applied materials & interfaces 2017 v.9 no.34 pp. 28386-28393
ISSN:
1944-8252
Subject:
Raman spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; capacitance; carbon; carbon fibers; chemical composition; crystal structure; electrodes; electrolytes; manganese dioxide; scanning electron microscopy; sodium chloride
Abstract:
... A highly uniform porous film of MnO₂ was deposited on carbon fiber by anodic electrodeposition for the fabrication of high-performance electrodes in wearable supercapacitors (SCs) application. The effects of potentiostatic and galvanostatic electrodeposition and the deposition time were investigated. The morphology, crystalline structure, and chemical composition of the obtained fiber-shaped sampl ...
DOI:
10.1021/acsami.7b06311

13. Island-like Nanoporous Gold: Smaller Island Generates Stronger Surface-Enhanced Raman Scattering

Author:
Huang, Jinglin; He, Zhibing; He, Xiaoshan; Liu, Yansong; Wang, Tao; Chen, Guo; Tang, Cuilan; Jia, Ru; Liu, Lei; Zhang, Ling; Wang, Jian; Ai, Xing; Sun, Shubing; Xu, Xiaoliang; Du, Kai
Source:
ACS applied materials & interfaces 2017 v.9 no.34 pp. 28902-28910
ISSN:
1944-8252
Subject:
Raman spectroscopy; gold; nanopores; statistical analysis
Abstract:
... The surface-enhanced Raman scattering properties of nanoporous gold prepared by the dealloying technique have been investigated for many years.The relatively low enhancement factor and the poor uniformity of existing conventional or advanced nanoporous gold structures are still the main factors that limit their wide application as Raman enhancement substrates. Here, we report island-like nanoporou ...
DOI:
10.1021/acsami.7b08013

14. Kish Graphite Flakes as a Cathode Material for an Aluminum Chloride–Graphite Battery

Author:
Wang, Shutao; Kravchyk, Kostiantyn V.; Krumeich, Frank; Kovalenko, Maksym V.
Source:
ACS applied materials & interfaces 2017 v.9 no.34 pp. 28478-28485
ISSN:
1944-8252
Subject:
Raman spectroscopy; X-ray diffraction; aluminum; aluminum chloride; batteries; byproducts; cathodes; electricity; electrochemistry; graphene; ionic liquids; surface area
Abstract:
... Nonaqueous, ionic liquid-based aluminum chloride–graphite batteries (AlCl₃–GBs) are a highly promising post-Li-ion technology for low-cost and large-scale storage of electricity because these batteries feature exclusively highly abundant chemical elements and simple fabrication methods. In this work, we demonstrate that synthetic kish graphite, which is a byproduct of steelmaking, can be used as a ...
DOI:
10.1021/acsami.7b07499

15. Rapid and Reliable Detection of Alkaline Phosphatase by a Hot Spots Amplification Strategy Based on Well-Controlled Assembly on Single Nanoparticle

Author:
Zeng, Yi; Ren, Jia-Qiang; Wang, Shao-Kai; Mai, Jia-Ming; Qu, Bing; Zhang, Yan; Shen, Ai-Guo; Hu, Ji-Ming
Source:
ACS applied materials & interfaces 2017 v.9 no.35 pp. 29547-29553
ISSN:
1944-8252
Subject:
Raman spectroscopy; alkaline phosphatase; alkynes; analytical kits; biocatalysis; blood serum; clinical trials; coatings; detection limit; electrostatic interactions; enzyme substrates; gold; humans; ions; medical treatment; monitoring; nanogold; nanoparticles; point-of-care systems; silver
Abstract:
... The first appeal of clinical assay is always accurate and rapid. For alkaline phosphatase (ALP) monitoring in medical treatment, a rapid, reliable surface-enhanced Raman scattering (SERS) test kit is designed based on a “hot spots” amplification strategy. Consisting of alkyne-tagged Au nanoparticles (NPs), Ag⁺, and enzyme substrate, the packaged test kit can achieve one-step clinical assay of ALP ...
DOI:
10.1021/acsami.7b09336

16. Rational Design of Ultrabright SERS Probes with Embedded Reporters for Bioimaging and Photothermal Therapy

Author:
Jin, Xiulong; Khlebtsov, Boris N.; Khanadeev, Vitaly A.; Khlebtsov, Nikolai G.; Ye, Jian
Source:
ACS applied materials & interfaces 2017 v.9 no.36 pp. 30387-30397
ISSN:
1944-8252
Subject:
Raman spectroscopy; heat; image analysis; membrane potential; mitochondrial membrane; monitoring; nanoparticles; neoplasm cells; neoplasms; silver; surface plasmon resonance; therapeutics; wavelengths
Abstract:
... Plasmonic nanoparticles can be utilized as surface-enhanced Raman scattering (SERS) probes for bioimaging and as photothermal (PT) agents for cancer therapy. Typically, their SERS and PT efficiencies reach maximal values under the on-resonant condition, when the excitation wavelength overlaps the localized surface plasmon resonance (LSPR) wavelength preferably in the near-infrared (NIR) biological ...
DOI:
10.1021/acsami.7b08733

17. Sensitive Surface-Enhanced Raman Scattering Detection Using On-Demand Postassembled Particle-on-Film Structure

Author:
Wang, Xuejiao; Zhu, Xupeng; Chen, Yiqin; Zheng, Mengjie; Xiang, Quan; Tang, Zhixiang; Zhang, Guanhua; Duan, Huigao
Source:
ACS applied materials & interfaces 2017 v.9 no.36 pp. 31102-31110
ISSN:
1944-8252
Subject:
Raman spectroscopy; films (materials); fruits; gels; gold; nanoparticles; pesticide residues
Abstract:
... Highly sensitive and low-cost surface-enhanced Raman scattering (SERS) substrates are essential for practical applications of SERS. In this work, we report an extremely simple but effective approach to achieve sensitive SERS detection of molecules (down to 10–¹⁰ M) by using a particle/molecule/film sandwich configuration. Compared to conventional SERS substrates which are preprepared to absorb ana ...
DOI:
10.1021/acsami.7b08818

18. Block-Copolymer-Templated Hierarchical Porous Carbon Nanostructures with Nitrogen-Rich Functional Groups for Molecular Sensing

Author:
Sun, Ya-Sen; Lin, Chien-Fu; Luo, Shih-Ting; Su, Ching-Yuan
Source:
ACS applied materials & interfaces 2017 v.9 no.37 pp. 31235-31244
ISSN:
1944-8252
Subject:
Raman spectroscopy; carbon; composite polymers; fluorescence; micelles; molecular weight; nanospheres; nitrogen; porosity; pyrolysis; surface area
Abstract:
... The self-assembly of a block copolymer offers access to micellar nanodomains with tunable dimensions and structural diversity through control of such molecular parameters as the volume fraction and molecular mass. We fabricated hierarchical porous carbon (HPC) nanostructures with bundles of aggregated nanospheres and with nitrogen-rich functional groups through pyrolysis of diblock copolymer micel ...
DOI:
10.1021/acsami.6b15317

19. Highly Sensitive, Uniform, and Reproducible Surface-Enhanced Raman Spectroscopy Substrate with Nanometer-Scale Quasi-periodic Nanostructures

Author:
Jin, Yuanhao; Wang, Yingcheng; Chen, Mo; Xiao, Xiaoyang; Zhang, Tianfu; Wang, Jiaping; Jiang, Kaili; Fan, Shoushan; Li, Qunqing
Source:
ACS applied materials & interfaces 2017 v.9 no.37 pp. 32369-32376
ISSN:
1944-8252
Subject:
Raman spectroscopy; carbon nanotubes; cost effectiveness; electromagnetic field; gold; pesticide residues; silicon
Abstract:
... We introduce a simple and cost-effective approach for fabrication of effective surface-enhanced Raman spectroscopy (SERS) substrates. It is shown that the as-fabricated substrates show excellent SERS effects in various probe molecules with high sensitivity, that is, picomolar level detection, and also good reliability. With a SERS enhancement factor beyond 10⁸ and excellent reproducibility (deviat ...
DOI:
10.1021/acsami.7b08807

20. Structural Basis of Polydopamine Film Formation: Probing 5,6-Dihydroxyindole-Based Eumelanin Type Units and the Porphyrin Issue

Author:
Alfieri, Maria L.; Micillo, Raffaella; Panzella, Lucia; Crescenzi, Orlando; Oscurato, Stefano L.; Maddalena, Pasqualino; Napolitano, Alessandra; Ball, Vincent; d’Ischia, Marco
Source:
ACS applied materials & interfaces 2017 v.10 no.9 pp. 7670-7680
ISSN:
1944-8252
Subject:
Raman spectroscopy; atomic force microscopy; eumelanin; folic acid; models; nitrogen; nuclear magnetic resonance spectroscopy; oxidation; polymers; porphyrins; quartz; spectral analysis; stable isotopes
Abstract:
... The role of 5,6-dihydroxyindole (DHI)-based oligomers, including porphyrin-like tetramers, in polydopamine (PDA) film formation was addressed by a comparative structural investigation against model polymers from DHI and its 2,7′-dimer. MALDI-MS data showed that (a) PDA is structurally different from DHI melanin and does not contain species compatible with DHI-based oligomers as primary building bl ...
DOI:
10.1021/acsami.7b09662

21. Flexible Microsphere-Embedded Film for Microsphere-Enhanced Raman Spectroscopy

Author:
Xing, Cheng; Yan, Yinzhou; Feng, Chao; Xu, Jiayu; Dong, Peng; Guan, Wei; Zeng, Yong; Zhao, Yan; Jiang, Yijian
Source:
ACS applied materials & interfaces 2017 v.9 no.38 pp. 32896-32906
ISSN:
1944-8252
Subject:
Raman spectroscopy; Sudan dyes; aqueous solutions; chemical elements; cost effectiveness; detection limit; gentian violet; microstructure; optical properties; photons
Abstract:
... Dielectric microspheres with extraordinary microscale optical properties, such as photonic nanojets, optical whispering-gallery modes (WGMs), and directional antennas, have drawn interest in many research fields. Microsphere-enhanced Raman spectroscopy (MERS) is an alternative approach for enhanced Raman detection by dielectric microstructures. Unfortunately, fabrication of microsphere monolayer a ...
DOI:
10.1021/acsami.7b09884

22. Annealing Induced Morphology of Silver Nanoparticles on Pyramidal Silicon Surface and Their Application to Surface-Enhanced Raman Scattering

Author:
Roy, Abhijit; Maiti, Arpan; Chini, Tapas Kumar; Satpati, Biswarup
Source:
ACS applied materials & interfaces 2017 v.9 no.39 pp. 34405-34415
ISSN:
1944-8252
Subject:
Raman spectroscopy; annealing; cost effectiveness; durability; nanoparticles; nanosilver; nitrogen; oxidation; oxygen; probability; silicon; silver
Abstract:
... This paper reports on a simple and cost-effective process of developing a stable surface-enhanced Raman scattering (SERS) substrate based on silver (Ag) nanoparticles deposited on silicon (Si) surface. Durability is an important issue for preparing SERS active substrate as silver nanostructures are prone to rapid surface oxidation when exposed to ambient conditions, which may result in the loss of ...
DOI:
10.1021/acsami.7b08493

23. Composite Gel Polymer Electrolyte for Improved Cyclability in Lithium–Oxygen Batteries

Author:
Chamaani, Amir; Safa, Meer; Chawla, Neha; El-Zahab, Bilal
Source:
ACS applied materials & interfaces 2017 v.9 no.39 pp. 33819-33826
ISSN:
1944-8252
Subject:
Raman spectroscopy; batteries; carbonates; cathodes; dielectric spectroscopy; electrolytes; glass; lithium; polymers; probability; scanning electron microscopy; solvents; superoxide anion
Abstract:
... Gel polymer electrolytes (GPE) and composite GPE (cGPE) using one-dimensional glass microfillers have been developed for their use in lithium–oxygen batteries. Using glass microfillers, tetraglyme solvent, UV-curable polymer, and lithium salt at various concentrations, the preparation of cGPE yielded free-standing films. These cGPEs, with 1 wt % of microfillers, demonstrated increased ionic conduc ...
DOI:
10.1021/acsami.7b08448

24. Efficient Removal of Heavy Metals from Polluted Water with High Selectivity for Mercury(II) by 2-Imino-4-thiobiuret–Partially Reduced Graphene Oxide (IT-PRGO)

Author:
Awad, Fathi S.; AbouZeid, Khaled M.; El-Maaty, Weam M. Abou; El-Wakil, Ahmad M.; El-Shall, M. Samy
Source:
ACS applied materials & interfaces 2017 v.9 no.39 pp. 34230-34242
ISSN:
1944-8252
Subject:
Fourier transform infrared spectroscopy; Raman spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; adsorbents; adsorption; aqueous solutions; arsenic; cadmium; chlorides; chromium; copper; desorption; graphene oxide; heavy metals; kinetics; lead; mercury; metal ions; nanosheets; nickel; remediation; sorption isotherms; toxicity; wastewater; water pollution; zinc
Abstract:
... A novel chelating adsorbent, based on the chemical modification of graphene oxide by functionalization amidinothiourea to form 2-imino-4-thiobiuret–partially reduced graphene oxide (IT-PRGO), is used for the effective extraction of the toxic metal ions Hg(II), Cu(II), Pb(II), Cr(VI), and As(V) from wastewater. FTIR and Raman spectroscopy, XRD, and XPS confirm the successful incorporation of the am ...
DOI:
10.1021/acsami.7b10021

25. Deep Eutectic Solvent Functionalized Graphene Composite as an Extremely High Potency Flame Retardant

Author:
Pethsangave, Dattatray A.; Khose, Rahul V.; Wadekar, Pravin H.; Some, Surajit
Source:
ACS applied materials & interfaces 2017 v.9 no.40 pp. 35319-35324
ISSN:
1944-8252
Subject:
Fourier transform infrared spectroscopy; Raman spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; chlorides; choline; cost effectiveness; flame retardants; graphene; graphene oxide; orthophosphates; phosphorus; scanning electron microscopy; smoke; solvents; thermogravimetry
Abstract:
... We report a simple and green approach to develop the deep eutectic solvent functionalized graphene derivative as an effective flame retardant. The deep eutectic solvent functionalized graphene oxide (DESGO) was synthesized by introducing nitrogen-supported phosphorus functional groups on the surface of graphene derivative via a deep eutectic solvent, which is prepared by the treatment of monosodiu ...
DOI:
10.1021/acsami.7b09587

26. Enhanced Electrocatalytic Oxygen Reduction on NiWOx Solid Solution with Induced Oxygen Defects

Author:
Shi, Meiqin; Tong, Xue; Li, Wang; Fang, Jun; Chen, Litao; Ma, Chun-an
Source:
ACS applied materials & interfaces 2017 v.9 no.40 pp. 34990-35000
ISSN:
1944-8252
Subject:
Raman spectroscopy; X-ray absorption spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; catalysts; crystallization; electrochemistry; nanoparticles; nickel; oxygen; transmission electron microscopy
Abstract:
... The continuous solid solution NiWOₓ is successfully prepared by using precursor W₁₈O₄₉ with plenty of oxygen defects. The NiWOₓ nanoparticles are characterized by X-ray diffraction, high-resolution transmission electron microscopy, X-ray photoelectron spectroscopy, Raman spectroscopy, and X-ray absorption spectroscopy. The crystallographic phase of NiWOₓ is stable and characterized by the same fea ...
DOI:
10.1021/acsami.7b10891

27. Synthesis and Structural and Optical Properties of Ga(As1–xPx)Ge3 and (GaP)yGe5–2y Semiconductors Using Interface-Engineered Group IV Platforms

Author:
Wallace, Patrick M.; Sims, Patrick E.; Xu, Chi; Poweleit, Christian D.; Kouvetakis, John; Menéndez, José
Source:
ACS applied materials & interfaces 2017 v.9 no.40 pp. 35105-35113
ISSN:
1944-8252
Subject:
Raman spectroscopy; absorption; alloys; arsenic; crystal structure; energy; optical properties; photoluminescence; semiconductors; silicon; solar energy; vapors; wavelengths
Abstract:
... Epitaxial synthesis of Ga(As₁–ₓPₓ)Ge₃ alloys on Si(100) substrates is demonstrated using chemical vapor deposition reactions of [D₂GaN(CH₃)₂]₂ with P(GeH₃)₃ and As(GeH₃)₃ precursors. These compounds are chosen to promote the formation of GaAsGe₃ and GaPGe₃ building blocks which interlink to produce the desired crystalline product. Ge-rich (GaP)yGe₅–₂y analogues have also been grown with tunable Ge ...
DOI:
10.1021/acsami.7b09272

28. Visible-Light Neural Stimulation on Graphitic-Carbon Nitride/Graphene Photocatalytic Fibers

Author:
Zhang, Zhongyang; Xu, Ruodan; Wang, Zegao; Dong, Mingdong; Cui, Bianxiao; Chen, Menglin
Source:
ACS applied materials & interfaces 2017 v.9 no.40 pp. 34736-34743
ISSN:
1944-8252
Subject:
Raman spectroscopy; X-ray photoelectron spectroscopy; ascorbic acid; biocompatibility; carbon nitride; cell culture; cell viability; coatings; colorimetry; culture media; electrical conductivity; gelatin; graphene; graphene oxide; lactate dehydrogenase; neurites; photocatalysts; photoluminescence; scanning electron microscopy; staining; surface area; wavelengths
Abstract:
... Light stimulation allows remote and spatiotemporally accurate operation that has been applied as effective, noninvasive means of therapeutic interventions. Here, visible-light neural stimulation of graphitic carbon nitride (g-C₃N₄), an emerging photocatalyst with visible-light optoelectronic conversion, was for the first time investigated. Specifically, g-C₃N₄ was combined with graphene oxide (GO) ...
DOI:
10.1021/acsami.7b12733

29. Ultrathin Nanocrystalline Diamond Films with Silicon Vacancy Color Centers via Seeding by 2 nm Detonation Nanodiamonds

Author:
Stehlik, Stepan; Varga, Marian; Stenclova, Pavla; Ondic, Lukas; Ledinsky, Martin; Pangrac, Jiri; Vanek, Ondrej; Lipov, Jan; Kromka, Alexander; Rezek, Bohuslav
Source:
ACS applied materials & interfaces 2017 v.9 no.44 pp. 38842-38853
ISSN:
1944-8252
Subject:
Raman spectroscopy; atomic force microscopy; color; information processing; nanocrystals; nanodiamonds; photoluminescence; photonics; roughness; scanning electron microscopy; silicon; vapors; zeta potential
Abstract:
... Color centers in diamonds have shown excellent potential for applications in quantum information processing, photonics, and biology. Here we report chemical vapor deposition (CVD) growth of nanocrystalline diamond (NCD) films as thin as 5–6 nm with photoluminescence (PL) from silicon-vacancy (SiV) centers at 739 nm. Instead of conventional 4–6 nm detonation nanodiamonds (DNDs), we prepared and emp ...
DOI:
10.1021/acsami.7b14436

30. Controlled Patterning of Plasmonic Dimers by Using an Ultrathin Nanoporous Alumina Membrane as a Shadow Mask

Author:
Hao, Qi; Huang, Hao; Fan, Xingce; Yin, Yin; Wang, Jiawei; Li, Wan; Qiu, Teng; Ma, Libo; Chu, Paul K.; Schmidt, Oliver G.
Source:
ACS applied materials & interfaces 2017 v.9 no.41 pp. 36199-36205
ISSN:
1944-8252
Subject:
Raman spectroscopy; aluminum oxide; nanopores
Abstract:
... We report on design and fabrication of patterned plasmonic dimer arrays by using an ultrathin anodic aluminum oxide (AAO) membrane as a shadow mask. This strategy allows for controllable fabrication of plasmonic dimers where the location, size, and orientation of each particle in the dimer pairs can be independently tuned. Particularly, plasmonic dimers with ultrasmall nanogaps down to the sub-10 ...
DOI:
10.1021/acsami.7b11428

31. Effect of Concentration on the Electrochemistry and Speciation of the Magnesium Aluminum Chloride Complex Electrolyte Solution

Author:
See, Kimberly A.; Liu, Yao-Min; Ha, Yeyoung; Barile, Christopher J.; Gewirth, Andrew A.
Source:
ACS applied materials & interfaces 2017 v.9 no.41 pp. 35729-35739
ISSN:
1944-8252
Subject:
magnesium chloride; cations; magnesium; electrochemistry; batteries; mass spectrometry; anodes; Raman spectroscopy; aluminum chloride
Abstract:
... Magnesium batteries offer an opportunity to use naturally abundant Mg and achieve large volumetric capacities reaching over four times that of conventional Li-based intercalation anodes. High volumetric capacity is enabled by the use of a Mg metal anode in which charge is stored via electrodeposition and stripping processes, however, electrolytes that support efficient Mg electrodeposition and str ...
DOI:
10.1021/acsami.7b08088

32. Morphological Control of Mesoporosity and Nanoparticles within Co3O4–CuO Electrospun Nanofibers: Quantum Confinement and Visible Light Photocatalysis Performance

Author:
Pradhan, Amaresh C; Uyar, Tamer
Source:
ACS applied materials & interfaces 2017 v.9 no.41 pp. 35757-35774
ISSN:
1944-8252
Subject:
Raman spectroscopy; absorption; cobalt; cupric oxide; dielectric spectroscopy; equations; mixing; nanofibers; nanoparticles; oxygen; phenolic compounds; photocatalysis; photoluminescence; polyethylene glycol; polyvinylpyrrolidone; porous media; reflectance spectroscopy; transmission electron microscopy; ultraviolet-visible spectroscopy
Abstract:
... The one-dimensional (1D) mesoporous and interconnected nanoparticles (NPs) enriched composite Co₃O₄–CuO nanofibers (NFs) in the ratio Co:Cu = 1/4 (Co₃O₄–CuO NFs) composite have been synthesized by electrospinning and calcination of mixed polymeric template. Not merely the mesoporous composite Co₃O₄–CuO NFs but also single mesoporous Co₃O₄ NFs and CuO NFs have been produced for comparison. The choi ...
DOI:
10.1021/acsami.7b09026

33. Ultrafast-Charging and Long-Life Li-Ion Battery Anodes of TiO2-B and Anatase Dual-Phase Nanowires

Author:
Li, Kaikai; Li, Baohua; Wu, Junxiong; Kang, Feiyu; Kim, Jang-Kyo; Zhang, Tong-Yi
Source:
ACS applied materials & interfaces 2017 v.9 no.41 pp. 35917-35926
ISSN:
1944-8252
Subject:
lithium batteries; energy; lithium; electrolytes; cathodes; diffusivity; titanium dioxide; durability; electrochemistry; nanowires; functional properties; cost effectiveness; nanoparticles; anodes; Raman spectroscopy
Abstract:
... Ideal lithium-ion batteries (LIBs) should possess a high power density, be charged extremely fast (e.g., 100C), and have a long service life. To achieve them all, all battery components, including anodes, cathodes, and electrolytes should have excellent structural and functional characteristics. The present work reports ultrafast-charging and long-life LIB anodes made from TiO₂-B/anatase dual-phas ...
DOI:
10.1021/acsami.7b11652

34. Bioplasmonic Alloyed Nanoislands Using Dewetting of Bilayer Thin Films

Author:
Kang, Minhee; Ahn, Myeong-Su; Lee, Youngseop; Jeong, Ki-Hun
Source:
ACS applied materials & interfaces 2017 v.9 no.42 pp. 37154-37159
ISSN:
1944-8252
Subject:
Raman spectroscopy; biophotonics; evaporation; films (materials); fluorescence; gold; silver; wavelengths
Abstract:
... Unlike monometallic materials, bimetallic plasmonic materials offer extensive benefits such as broadband tuning capability or high environmental stability. Here we report a broad range tuning of plasmon resonance of alloyed nanoislands by using solid-state dewetting of gold and silver bilayer thin films. Thermal dewetting after successive thermal evaporation of thin metal double-layer films readil ...
DOI:
10.1021/acsami.7b10715

35. Droplet-Guiding Superhydrophobic Arrays of Plasmonic Microposts for Molecular Concentration and Detection

Author:
Kang, Hyelim; Heo, Yong Joon; Kim, Dong Jae; Kim, Ju Hyeon; Jeon, Tae Yoon; Cho, Soojeong; So, Hye-Mi; Chang, Won Seok; Kim, Shin-Hyun
Source:
ACS applied materials & interfaces 2017 v.9 no.42 pp. 37201-37209
ISSN:
1944-8252
Subject:
Raman spectroscopy; contact angle; droplets; evaporation; hydrophobicity
Abstract:
... Droplet-guiding superhydrophobic SERS substrates are created by a combinatorial lithographic technique. Photolithography defines the pattern of a micropillar array with a radial density gradient, whereas colloidal lithography features a nanotip array on the top surface of each micropillar. The nanotip array renders the surface superhydrophobic, and the pattern of micropillars endows the radial gra ...
DOI:
10.1021/acsami.7b11506

36. Interface Modification of Bernal- and Rhombohedral-Stacked Trilayer-Graphene/Metal Electrode on Resistive Switching of Silver Electrochemical Metallization Cells

Author:
Wang, Jer-Chyi; Chan, Ya-Ting; Chen, Wei-Fan; Wu, Ming-Chung; Lai, Chao-Sung
Source:
ACS applied materials & interfaces 2017 v.9 no.42 pp. 37031-37040
ISSN:
1944-8252
Subject:
Raman spectroscopy; atomic force microscopy; electric power; electrochemistry; electrodes; endurance testing; energy; graphene; iridium; nickel; silver; van der Waals forces
Abstract:
... Bernal- and rhombohedral-stacked trilayer graphene (B- and r-TLG) on nickel (Ni) and iridium (Ir) films acting as bottom electrodes (BEs) of silver electrochemical metallization cells (Ag-EMCs) have been investigated in this study. Prior to the fabrication of the EMC devices, Raman mapping and atomic force microscopy are applied to identify the B- and r-TLG sheets, with the latter revealing a sign ...
DOI:
10.1021/acsami.7b10407

37. Mechanism of Surface-Enhanced Raman Scattering Based on 3D Graphene–TiO2 Nanocomposites and Application to Real-Time Monitoring of Telomerase Activity in Differentiation of Stem Cells

Author:
Zheng, Tingting; Feng, Enduo; Wang, Zhiqiang; Gong, Xueqing; Tian, Yang
Source:
ACS applied materials & interfaces 2017 v.9 no.42 pp. 36596-36605
ISSN:
1944-8252
Subject:
Raman spectroscopy; X-ray photoelectron spectroscopy; biosensors; cell differentiation; copper; drugs; electrochemistry; enzyme activity; graphene; humans; irradiation; monitoring; nanocomposites; nanomaterials; screening; stem cells; telomerase; telomeres; titanium dioxide
Abstract:
... With a burst development of new nanomaterials for plasmon-free surface-enhanced Raman scattering (SERS), the understanding of chemical mechanism (CM) and further applications have become more and more attractive. Herein, a novel SERS platform was specially designed through electrochemical deposition of graphene onto TiO₂ nanoarrays (EG–TiO₂). The developed EG–TiO₂ nanocomposite SERS platform posse ...
DOI:
10.1021/acsami.7b11028

38. One-Pot Synthesis of Reduced Graphene Oxide/Metal (Oxide) Composites

Author:
Wu, Xu; Xing, Yuqian; Pierce, David; Zhao, Julia Xiaojun
Source:
ACS applied materials & interfaces 2017 v.9 no.43 pp. 37962-37971
ISSN:
1944-8252
Subject:
Fourier transform infrared spectroscopy; Raman spectroscopy; X-ray diffraction; ascorbic acid; catalysts; dopamine; electrochemistry; electrodes; energy-dispersive X-ray analysis; gluconic acid; glucose; gold; graphene; graphene oxide; nanoparticles; physicochemical properties; reducing agents; scanning electron microscopy; silver; stabilizers; ultraviolet-visible spectroscopy; uric acid
Abstract:
... Graphene, one of the most attractive two-dimensional nanomaterials, has demonstrated a broad range of applications because of its excellent electronic, mechanical, optical, and chemical properties. In this work, a general, environmentally friendly, one-pot method for the fabrication of reduced graphene oxide (RGO)/metal (oxide) (e.g., RGO/Au, RGO/Cu₂O, and RGO/Ag) composties was developed using gl ...
DOI:
10.1021/acsami.7b12539

39. Overcoming Catalyst Residue Inhibition of the Functionalization of Single-Walled Carbon Nanotubes via the Billups–Birch Reduction

Author:
Zhang, Kevin S.; Pham, David; Lawal, Olawale; Ghosh, Saunab; Gangoli, Varun Shenoy; Smalley, Preston; Kennedy, Katherine; Brinson, Bruce E.; Billups, W. Edward; Hauge, Robert H.; Adams, W. Wade; Barronβ, Andrew R.
Source:
ACS applied materials & interfaces 2017 v.9 no.43 pp. 37972-37980
ISSN:
1944-8252
Subject:
Raman spectroscopy; carbon; carbon nanotubes; catalysts; chemical reactions; evaporation; iron; solvents
Abstract:
... The Billups–Birch Reduction chemistry has been shown to functionalize single-walled carbon nanotubes (SWCNTs) without damaging the sidewalls, but has challenges in scalability. Currently published work uses a large mole ratio of Li to carbon atoms in the SWCNT (Li:C) to account for lithium amide formation, however this increases the cost and hazard of the reaction. We report here the systematic un ...
DOI:
10.1021/acsami.7b12857

40. Steric-Hindrance-Functionalized Polydiarylfluorenes: Conformational Behavior, Stabilized Blue Electroluminescence, and Efficient Amplified Spontaneous Emission

Author:
Bai, Lubing; Liu, Bin; Han, Yamin; Yu, Mengna; Wang, Jiong; Zhang, Xinwen; Ou, Changjin; Lin, Jinyi; Zhu, Wensai; Xie, Linghai; Yin, Chengrong; Zhao, Jianfeng; Wang, Jianpu; Bradley, Donal D. C.; Huang, Wei
Source:
ACS applied materials & interfaces 2017 v.9 no.43 pp. 37856-37863
ISSN:
1944-8252
Subject:
Raman spectroscopy; annealing; composite polymers; copolymerization; electrochemiluminescence; light emitting diodes; organofluorine compounds; photoluminescence
Abstract:
... Control of the hierarchical molecular organization of polydiarylfluorenes by synthetic strategies is significant for optimizing photophysical properties as well as the performance of light-emitting devices. Herein, for the suppression of molecular aggregation and enhancement of luminescence efficiency, a series of steric units were introduced into polydiarylfluorenes by copolymerization, with the ...
DOI:
10.1021/acsami.7b08980

41. Tunable and Linker Free Nanogaps in Core–Shell Plasmonic Nanorods for Selective and Quantitative Detection of Circulating Tumor Cells by SERS

Author:
Zhang, Yang; Yang, Peng; Habeeb Muhammed, Madathumpady Abubaker; Alsaiari, Shahad K.; Moosa, Basem; Almalik, Abdulaziz; Kumar, Anjli; Ringe, Emilie; Khashab, Niveen M.
Source:
ACS applied materials & interfaces 2017 v.9 no.43 pp. 37597-37605
ISSN:
1944-8252
Subject:
DNA; Raman spectroscopy; blood; breast neoplasms; coordination compounds; doxorubicin; encapsulation; gold; hydrophobicity; image analysis; ions; nanorods; neoplasm cells; oligonucleotides; silver; therapeutics
Abstract:
... Controlling the size, number, and shape of nanogaps in plasmonic nanostructures is of significant importance for the development of novel quantum plasmonic devices and quantitative sensing techniques such as surface-enhanced Raman scattering (SERS). Here, we introduce a new synthetic method based on coordination interactions and galvanic replacement to prepare core–shell plasmonic nanorods with tu ...
DOI:
10.1021/acsami.7b10959

42. Capacitive Sensing of Glucose in Electrolytes Using Graphene Quantum Capacitance Varactors

Author:
Zhang, Yao; Ma, Rui; Zhen, Xue V.; Kudva, Yogish C.; Bühlmann, Philippe; Koester, Steven J.
Source:
ACS applied materials & interfaces 2017 v.9 no.44 pp. 38863-38869
ISSN:
1944-8252
Subject:
Raman spectroscopy; capacitance; electric power; electrical equipment; electrolytes; glucose; graphene; monitoring
Abstract:
... A novel graphene-based variable capacitor (varactor) that senses glucose based on the quantum capacitance effect was successfully developed. The sensor utilizes a metal–oxide–graphene varactor device structure that is inherently compatible with passive wireless sensing, a key advantage for in vivo glucose sensing. The graphene varactors were functionalized with pyrene-1-boronic acid (PBA) by self- ...
DOI:
10.1021/acsami.7b14864

43. Click-Functionalized SERS Nanoprobes with Improved Labeling Efficiency and Capability for Cancer Cell Imaging

Author:
Liu, Renyong; Zhao, Jun; Han, Guangmei; Zhao, Tingting; Zhang, Ruilong; Liu, Bianhua; Liu, Zhengjie; Zhang, Cheng; Yang, Linlin; Zhang, Zhongping
Source:
ACS applied materials & interfaces 2017 v.9 no.44 pp. 38222-38229
ISSN:
1944-8252
Subject:
Raman spectroscopy; azides; biocompatibility; disulfide bonds; folate receptors; folic acid; image analysis; nanogold; nanoparticles; neoplasm cells; neoplasms; therapeutics
Abstract:
... Precise identification and detection of cancer cells using nanoparticle probes are critically important for early cancer diagnosis and subsequent therapy. We herein develop novel folate receptor (FR)-targeted surface-enhanced Raman scattering (SERS) nanoprobes for cancer cell imaging based on a click coupling strategy. A Raman-active derivative (5,5′-dithiobis(2-nitrobenzoic acid)-N₃ (DNBA-N₃)) is ...
DOI:
10.1021/acsami.7b10409

44. Hierarchically-Designed 3D Flower-Like Composite Nanostructures as an Ultrastable, Reproducible, and Sensitive SERS Substrate

Author:
Yüksel, Sezin; Ziegler, Mario; Goerke, Sebastian; Huebner, Uwe; Weber, Karina; Schaaf, Peter; Meyer, Hans-Georg; Cialla-May, Dana; Popp, Jürgen
Source:
ACS applied materials & interfaces 2017 v.9 no.44 pp. 38854-38862
ISSN:
1944-8252
Subject:
Raman spectroscopy; gold; hydrophobicity; models; nanocomposites; nanosilver; optical properties; periodicity; riboflavin; silica; silver
Abstract:
... Surface-enhanced Raman spectroscopy (SERS) is an attractive tool in the analytical sciences due to its high specificity and sensitivity. Because SERS-active substrates are only available as two-dimensional arrays, the fabrication of three-dimensional (3D) nanostructures allows for an increased number of hot spots in the focus volume, thus further amplifying the SERS signal. Although a great number ...
DOI:
10.1021/acsami.7b14833

45. Plasmon-Induced Selective Oxidation Reaction at Single-Walled Carbon Nanotubes

Author:
Yasuda, Satoshi; Yoshii, Takahiro; Chiashi, Shohei; Maruyama, Shigeo; Murakoshi, Kei
Source:
ACS applied materials & interfaces 2017 v.9 no.44 pp. 38992-38998
ISSN:
1944-8252
Subject:
Raman spectroscopy; carbon nanotubes; gold; irradiation; oxidation; singlet oxygen; surface plasmon resonance
Abstract:
... Local surface plasmon resonance (LSPR)-induced oxidation of semiconducting and metallic single-walled nanotubes (SWNTs) on the nanometer scale was investigated using surface-enhanced Raman scattering (SERS) measurements. An isolated SWNT was supported on a well-defined Au nanodimer structure that possesses an LSPR field at the nanogap under light irradiation, and highly intense SERS spectra of the ...
DOI:
10.1021/acsami.7b07636

46. Au/Graphene Oxide Nanocomposite Synthesized in Supercritical CO2 Fluid as Energy Efficient Lubricant Additive

Author:
Meng, Yuan; Su, Fenghua; Chen, Yangzhi
Source:
ACS applied materials & interfaces 2017 v.9 no.45 pp. 39549-39559
ISSN:
1944-8252
Subject:
Raman spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; carbon dioxide; crystal structure; energy efficiency; friction; gold; graphene oxide; lubricants; nanocomposites; nanogold; nanosheets; oils; scanning electron microscopy; thermogravimetry; transmission electron microscopy
Abstract:
... Au nanoparticles are successfully decorated onto graphene oxide (GO) sheets with the aid of supercritical carbon dioxide (ScCO₂) fluid. The synthesized nanocomposite (Sc–Au/GO) was characterized by X-ray diffraction (XRD), Raman spectroscopy, thermal gravimetric analysis (TGA), and transmission electron microscopy (TEM). The characterization results show that the Au nanoparticles are featured with ...
DOI:
10.1021/acsami.7b10276

47. Design of Porous/Hollow Structured Ceria by Partial Thermal Decomposition of Ce-MOF and Selective Etching

Author:
Chen, Guozhu; Guo, Zeyi; Zhao, Wei; Gao, Daowei; Li, Cuncheng; Ye, Chen; Sun, Guoxin
Source:
ACS applied materials & interfaces 2017 v.9 no.45 pp. 39594-39601
ISSN:
1944-8252
Subject:
Raman spectroscopy; X-ray photoelectron spectroscopy; carbon monoxide; catalytic activity; coordination polymers; crystallites; cupric oxide; heat treatment; hydrogen; oxidation; surface area; thermal degradation
Abstract:
... Metal–organic frameworks (MOFs) have been widely used to prepare corresponding porous metal oxides via thermal treatment. However, high temperature treatment always leads to obtained metal oxides with a large crystallite size, thus decreasing their specific surface area. Different from the conventional complete thermal decomposition of MOFs, herein, using Ce-MOF as a demonstration, we choose parti ...
DOI:
10.1021/acsami.7b11916

48. Detection of Dithiocarbamate Pesticides with a Spongelike Surface-Enhanced Raman Scattering Substrate Made of Reduced Graphene Oxide-Wrapped Silver Nanocubes

Author:
Zhu, Chuhong; Wang, Xiujuan; Shi, Xiaofei; Yang, Feng; Meng, Guowen; Xiong, Qizhong; Ke, Yan; Wang, Hua; Lu, Yilin; Wu, Nianqiang
Source:
ACS applied materials & interfaces 2017 v.9 no.45 pp. 39618-39625
ISSN:
1944-8252
Subject:
Raman spectroscopy; adsorption; graphene; graphene oxide; nanomaterials; pesticide residues; pesticides; quantitative analysis; silver
Abstract:
... Dithiocarbamate (DTC) pesticides are widely used for fruits, vegetables, and mature crops to control fungal diseases. Their residues in food could pose a threat to human health. Therefore, a surface-enhanced Raman scattering-based (SERS-based) sensor is developed to detect DTC pesticides because SERS can provide the characteristic spectrum of pesticides and avoid the use of a molecular recognition ...
DOI:
10.1021/acsami.7b13479

49. Direct Metal Writing and Precise Positioning of Gold Nanoparticles within Microfluidic Channels for SERS Sensing of Gaseous Analytes

Author:
Lee, Mian Rong; Lee, Hiang Kwee; Yang, Yijie; Koh, Charlynn Sher Lin; Lay, Chee Leng; Lee, Yih Hong; Phang, In Yee; Ling, Xing Yi
Source:
ACS applied materials & interfaces 2017 v.9 no.45 pp. 39584-39593
ISSN:
1944-8252
Subject:
Raman spectroscopy; ethylene glycol; gold; microstructure; monitoring; nanogold; optical properties; polyols; surface roughness
Abstract:
... We demonstrate a one-step precise direct metal writing of well-defined and densely packed gold nanoparticle (AuNP) patterns with tunable physical and optical properties. We achieve this by using two-photon lithography on a Au precursor comprising poly(vinylpyrrolidone) (PVP) and ethylene glycol (EG), where EG promotes higher reduction rates of Au(III) salt via polyol reduction. Hence, clusters of ...
DOI:
10.1021/acsami.7b11649

50. Fabrication of Plasmonically Active Substrates Using Engineered Silver Nanostructures for SERS Applications

Author:
Sakir, Menekse; Pekdemir, Sami; Karatay, Ahmet; Küçüköz, Betül; Ipekci, Hasan H.; Elmali, Ayhan; Demirel, Gokhan; Onses, M. Serdar
Source:
ACS applied materials & interfaces 2017 v.9 no.45 pp. 39795-39803
ISSN:
1944-8252
Subject:
Raman spectroscopy; brushes; catalytic activity; hydroquinone; nanogold; polyethylene glycol; reducing agents; silver
Abstract:
... Demanding applications in sensing, metasurfaces, catalysis, and biotechnology require fabrication of plasmonically active substrates. Herein, we demonstrate a bottom-up, versatile, and scalable approach that relies on direct growth of silver nanostructures from seed particles that were immobilized on polymer brush-grafted substrates. Our approach is based on (i) the uniform and tunable assembly of ...
DOI:
10.1021/acsami.7b12279