PubAg

Main content area

You searched for: Publication Year 2015 Remove constraint Publication Year: 2015 Source 2015 v.7 no.28 Remove constraint Source: 2015 v.7 no.28
Start Over

Search

65  Search Results

« Previous | 1 - 20 of 65 |
Number of results to display per page

Search Results

1. Abnormal Behavior of Threshold Voltage Shift in Bias-Stressed a-Si:H Thin Film Transistor under Extremely High Intensity Illumination

Author:
Han, Sang Youn; Park, Kyung Tea; Kim, Cheolkyu; Jeon, Sanghyun; Yang, Sung-Hoon; Kong, Hyang-Shik
Source:
ACS Applied Materials & Interfaces 2015 v.7 no.28 pp. 15442-15446
ISSN:
1944-8252
Subject:
aluminum; copper; electric power; electrodes; electronic equipment; electrons; energy; films (materials); lighting; photons; silicon; wavelengths
Abstract:
... We report on the unusual behavior of threshold voltage turnaround in a hydrogenated amorphous silicon (a-Si:H) thin film transistor (TFT) when biased under extremely high intensity illumination. The threshold voltage shift changes from negative to positive gate bias direction after ∼30 min of bias stress even when the negative gate bias stress is applied under high intensity illumination (>400 000 ...
DOI:
10.1021/acsami.5b03609

2. Acute in Vivo Toxicity Mitigation of PEI-Coated Maghemite Nanoparticles Using Controlled Oxidation and Surface Modifications toward siRNA Delivery

Author:
Israel, Liron Limor; Lellouche, Emmanuel; Ostrovsky, Stella; Yarmiayev, Valeria; Bechor, Moshe; Michaeli, Shulamit; Lellouche, Jean-Paul (Moshe)
Source:
ACS Applied Materials & Interfaces 2015 v.7 no.28 pp. 15240-15255
ISSN:
1944-8252
Subject:
Lewis acids; Lewis bases; amines; animals; cations; ceric ammonium nitrate; death; drugs; erythrocytes; gene silencing; hydrogen peroxide; ligands; luciferase; maghemite; magnetic resonance imaging; nanoparticles; oxidation; polymers; potassium persulfate; small interfering RNA; thrombosis; toxicity
Abstract:
... A ceric ammonium nitrate (CAN)-based doping step was used for the fabrication of core maghemite nanoparticles (NPs) that enabled the obtainment of colloid particles with a view to a high-level nanoparticle (NP) surface doping by Ce(III/IV). Such doping of Ce(III/IV) cations enables one to exploit their quite rich coordination chemistry for ligand coordinative binding. In fact, they were shown to a ...
DOI:
10.1021/acsami.5b02743

3. Adhesive Force Measurement between HOPG and Zinc Oxide as an Indicator for Interfacial Bonding of Carbon Fiber Composites

Author:
Patterson, Brendan A.; Galan, Ulises; Sodano, Henry A.
Source:
ACS applied materials 2015 v.7 no.28 pp. 15380-15387
ISSN:
1944-8252
Subject:
X-ray photoelectron spectroscopy; adhesion; atomic force microscopy; carbon fibers; chemical interactions; composite materials; graphene; interphase; nanoparticles; nanowires; oxygen; zinc oxide
Abstract:
... Vertically aligned zinc oxide (ZnO) nanowires have recently been utilized as an interphase to increase the interfacial strength of carbon fiber composites. It was shown that the interaction between the carbon fiber and the ZnO nanowires was a critical parameter in adhesion; however, fiber based testing techniques are dominated by local defects and cannot be used to effectively study the bonding in ...
DOI:
10.1021/acsami.5b03322

4. Adsorption-Induced Conformational Isomerization of Alkyl-Substituted Thiophene Oligomers on Au(111): Impact on the Interfacial Electronic Structure

Author:
Taber, Benjamen N.; Kislitsyn, Dmitry A.; Gervasi, Christian F.; Mannsfeld, Stefan C. B.; Zhang, Lei; Briseno, Alejandro L.; Nazin, George V.
Source:
ACS applied materials 2015 v.7 no.28 pp. 15138-15142
ISSN:
1944-8252
Subject:
adsorption; crystals; energy; gold; isomerization; scanning tunneling microscopy; spectroscopy; thiophene
Abstract:
... Alkyl-substituted quaterthiophenes on Au(111) form dimers linked by their alkyl substituents and, instead of adopting the trans conformation found in bulk oligothiophene crystals, assume cis conformations. Surprisingly, the impact of the conformation is not decisive in determining the lowest unoccupied molecular orbital energy. Scanning tunneling microscopy and spectroscopy of the adsorption geome ...
DOI:
10.1021/acsami.5b03516

5. (Ag,Cu)–Ta–O Ternaries As High-Temperature Solid-Lubricant Coatings

Author:
Gao, Hongyu; Otero-de-la-Roza, Alberto; Gu, Jingjing; Stone, D’Arcy; Aouadi, Samir M.; Johnson, Erin R.; Martini, Ashlie
Source:
ACS Applied Materials & Interfaces 2015 v.7 no.28 pp. 15422-15429
ISSN:
1944-8252
Subject:
coatings; copper; energy; friction; lubricants; methodology; molecular dynamics; oxides; silver; temperature
Abstract:
... Ternary oxides have gained increasing attention due to their potential use as solid lubricants at elevated temperatures. In this work, the tribological properties of three ternary oxidesAgTaO₃, CuTaO₃, and CuTa₂O₆were studied using a combination of density-functional theory (DFT), molecular dynamics (MD) simulations with newly developed empirical potential parameters, and experimental measuremen ...
DOI:
10.1021/acsami.5b03543

6. Amplified and Localized Photoswitching of TiO2 by Micro- and Nanostructuring

Author:
Hoshian, Sasha; Jokinen, Ville; Hjort, Klas; Ras, Robin H. A.; Franssila, Sami
Source:
ACS Applied Materials & Interfaces 2015 v.7 no.28 pp. 15593-15599
ISSN:
1944-8252
Subject:
geometry; heat; hydrophilicity; hydrophobicity; rolling; titanium dioxide
Abstract:
... Fast photoswitching of wetting properties is important for the development of micro/nanofluidic systems and lab-on-a-chip devices. Here, we show how structuring the surface amplifies photoswitching properties. Atomic layer-deposited titanium dioxide (TiO₂) has phototunable hydrophilic properties due to its surface chemistry, but microscale overhang pillars and additional nanoscale topography can o ...
DOI:
10.1021/acsami.5b04309

7. Anodic, Cathodic, and Annihilation Electrochemiluminescence Emissions from Hydrophilic Conjugated Polymer Dots in Aqueous Medium

Author:
Dai, Ruiping; Wu, Fanmin; Xu, Huifeng; Chi, Yuwu
Source:
ACS Applied Materials & Interfaces 2015 v.7 no.28 pp. 15160-15167
ISSN:
1944-8252
Subject:
aqueous solutions; biocompatibility; carbon; chemical bonding; cytotoxicity; electrochemiluminescence; emissions; hydrophilicity; nanomaterials; octoxynol
Abstract:
... Hydrophilic poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV) conjugated polymer dots (CP-dots) capped by Triton X-100 were synthesized. For the first time, the electrochemiluminescence (ECL) emission of CP-dots was investigated in aqueous solution. At the glassy carbon/water interface, the CP-dots have excellent and multichannel ECL properties, such as having annihilation ECL ac ...
DOI:
10.1021/acsami.5b04305

8. Chemiresistive Sensing Behavior of SnO2 (n)–Cu2O (p) Core–Shell Nanowires

Author:
Kim, Jae-Hun; Katoch, Akash; Kim, Soo-Hyun; Kim, Sang Sub
Source:
ACS applied materials 2015 v.7 no.28 pp. 15351-15358
ISSN:
1944-8252
Subject:
cuprous oxide; nanowires; tin dioxide; vapors
Abstract:
... We report the synthesis of SnO₂–Cu₂O n–p core–shell nanowires (C–S NWs) and their use as chemiresistive sensors for detecting trace amounts of gas. The n–p C–S NWs were synthesized by a two-step process, in which the core SnO₂ nanowires were prepared by the vapor growth technique and subsequently the Cu₂O shell layers were deposited by atomic layer deposition. A systematic investigation of the sen ...
DOI:
10.1021/acsami.5b03224

9. Composition-Dependent Electrocatalytic Activity of Palladium–Iridium Binary Alloy Nanoparticles Supported on the Multiwalled Carbon Nanotubes for the Electro-Oxidation of Formic Acid

Author:
Bao, Jianming; Dou, Meiling; Liu, Haijing; Wang, Feng; Liu, Jingjun; Li, Zhilin; Ji, Jing
Source:
ACS Applied Materials & Interfaces 2015 v.7 no.28 pp. 15223-15229
ISSN:
1944-8252
Subject:
X-ray diffraction; alloy nanoparticles; carbon monoxide poisoning; carbon nanotubes; formic acid; iridium; palladium; transmission electron microscopes; transmission electron microscopy
Abstract:
... Surface-functionalized multiwalled carbon nanotubes (MWCNTs) supported Pd₁₀₀–ₓIrₓ binary alloy nanoparticles (Pd₁₀₀–ₓIrₓ/MWCNT) with tunable Pd/Ir atomic ratios were synthesized by a thermolytic process at varied ratios of bis(acetylacetonate) palladium(II) and iridium(III) 2,4-pentanedionate precursors and then applied as the electrocatalyst for the formic acid electro-oxidation. The X-ray diffra ...
DOI:
10.1021/acsami.5b01848

10. Computational Analysis of Stable Hard Structures in the Ti–B System

Author:
Li, Pengfei; Zhou, Rulong; Zeng, Xiao Cheng
Source:
ACS Applied Materials & Interfaces 2015 v.7 no.28 pp. 15607-15617
ISSN:
1944-8252
Subject:
boron compounds; crystal structure; crystals; energy; modulus of elasticity; thermodynamics; titanium
Abstract:
... The lowest energy crystalline structures of various stoichiometric titanium boride (Ti–B) intermetallic compounds are sought based on density functional theory combined with the particle-swarm optimization (PSO) technique. Besides three established experimental structures, i.e., FeB-type TiB, AlB₂-type, and Ta₃B₄-type Ti₃B₄, we predict additional six metastable phases at these stoichiometric ratio ...
DOI:
10.1021/acsami.5b04332

11. Coupling of Metals and Biominerals: Characterizing the Interface between Ferromagnetic Shape-Memory Alloys and Hydroxyapatite

Author:
Allenstein, Uta; Selle, Susanne; Tadsen, Meike; Patzig, Christian; Höche, Thomas; Zink, Mareike; Mayr, Stefan G.
Source:
ACS applied materials 2015 v.7 no.28 pp. 15331-15338
ISSN:
1944-8252
Subject:
alloys; biomimetics; chemistry; coatings; delamination; energy; hydroxyapatite; models; orthopedics; transmission electron microscopy
Abstract:
... Durable, mechanically robust osseointegration of metal implants poses one of the largest challenges in contemporary orthopedics. The application of biomimetic hydroxyapatite (HAp) coatings as mediators for enhanced mechanical coupling to natural bone constitutes a promising approach. Motivated by recent advances in the field of smart metals that might open the venue for alternate therapeutic conce ...
DOI:
10.1021/acsami.5b03189

12. Dopamine-Assisted Synthesis of Carbon-Coated Silica for PCR Enhancement

Author:
Park, Ji Young; Back, Seung Hun; Chang, Sung-Jin; Lee, Seok Jae; Lee, Kyoung G.; Park, Tae Jung
Source:
ACS applied materials 2015 v.7 no.28 pp. 15633-15640
ISSN:
1944-8252
Subject:
analytical methods; biosensors; carbonization; dopamine; genes; genetic disorders; genomics; nanocomposites; nanoparticles; polymerization; quantitative polymerase chain reaction; silica; tissues
Abstract:
... Polymerase chain reaction (PCR) has become one of the most popular methods to identify genomic information on cells and tissues as well as to solve crimes and check genetic diseases. Recently, the nanomaterials including nanocomposite and nanoparticles have been considered as a next generation of solution to improve both quality and productivity of PCR. Herein, taking into these demands, carbon-co ...
DOI:
10.1021/acsami.5b04404

13. Dual-Peptide-Functionalized Albumin-Based Nanoparticles with pH-Dependent Self-Assembly Behavior for Drug Delivery

Author:
Chen, Bin; He, Xiao-Yan; Yi, Xiao-Qing; Zhuo, Ren-Xi; Cheng, Si-Xue
Source:
ACS Applied Materials & Interfaces 2015 v.7 no.28 pp. 15148-15153
ISSN:
1944-8252
Subject:
drug therapy; drugs; electrical charges; electrostatic interactions; ligands; nanoparticles; neoplasm cells; neoplasms; pH
Abstract:
... Drug delivery has become an important strategy for improving the chemotherapy efficiency. Here we developed a multifunctionalized nanosized albumin-based drug-delivery system with tumor-targeting, cell-penetrating, and endolysosomal pH-responsive properties. cRGD-BSA/KALA/DOX nanoparticles were fabricated by self-assembly through electrostatic interaction between cell-penetrating peptide KALA and ...
DOI:
10.1021/acsami.5b03866

14. Effect of AIE Substituents on the Fluorescence of Tetraphenylethene-Containing BODIPY Derivatives

Author:
Gomez-Duran, Cesar F. Azael; Hu, Rongrong; Feng, Guangxue; Li, Tingzhong; Bu, Fan; Arseneault, Mathieu; Liu, Bin; Peña-Cabrera, Eduardo; Tang, Ben Zhong
Source:
ACS applied materials 2015 v.7 no.28 pp. 15168-15176
ISSN:
1944-8252
Subject:
crystal structure; fluorescence; image analysis; nanoparticles
Abstract:
... A series of BODIPY derivatives with tetraphenylethene (TPE) moieties were designed and synthesized. The effect of positions and numbers of substitution groups on the fluorescence of the BODIPYs was investigated. Theoretical calculation and single crystal structures proved that the TPE substitution groups on the 8-position of BODIPY contributed little to the conjugation, but benefited the aggregate ...
DOI:
10.1021/acsami.5b05033

15. Effects of Graphene Modification on the Bioactivation of Polyethylene-Terephthalate-Based Artificial Ligaments

Author:
Wang, Chun-Hui; Guo, Zhong-Shang; Pang, Fei; Zhang, Li-Yuan; Yan, Ming; Yan, Jin-Hong; Li, Ke-Wen; Li, Xiao-Jie; Li, Yong; Bi, Long; Han, Yi-Sheng
Source:
ACS Applied Materials & Interfaces 2015 v.7 no.28 pp. 15263-15276
ISSN:
1944-8252
Subject:
anterior cruciate ligament; biomechanics; coatings; genes; graphene; in vitro studies; in vivo studies; micro-computed tomography; models; polyethylene terephthalates; quantitative polymerase chain reaction; rabbits; staining; surgery; transcription (genetics)
Abstract:
... The objective of this study was to investigate whether surface coating with graphene could enhance the surface bioactivation of PET-based artificial ligaments to accelerate graft-to-bone healing after anterior cruciate ligament reconstruction. In an in vitro study, the proliferation of MC3T3-E1 cells and their differentiation on the scaffolds were quantified via 3-(4,5-dimethylthiazol-2-yl)-2,5-di ...
DOI:
10.1021/acsami.5b02893

16. Efficient Electrochemical CO2 Conversion Powered by Renewable Energy

Author:
Kauffman, Douglas R.; Thakkar, Jay; Siva, Rajan; Matranga, Christopher; Ohodnicki, Paul R.; Zeng, Chenjie; Jin, Rongchao
Source:
ACS Applied Materials & Interfaces 2015 v.7 no.28 pp. 15626-15632
ISSN:
1944-8252
Subject:
batteries; carbon dioxide; catalysts; electricity; electrochemistry; electrolysis; greenhouse gas emissions; nanoparticles; renewable energy sources
Abstract:
... The catalytic conversion of CO₂ into industrially relevant chemicals is one strategy for mitigating greenhouse gas emissions. Along these lines, electrochemical CO₂ conversion technologies are attractive because they can operate with high reaction rates at ambient conditions. However, electrochemical systems require electricity, and CO₂ conversion processes must integrate with carbon-free, renewab ...
DOI:
10.1021/acsami.5b04393

17. Electron Backscatter Diffraction Study of Hexagonal Boron Nitride Growth on Cu Single-Crystal Substrates

Author:
Hite, Jennifer K.; Robinson, Zachary R.; Eddy, Charles R.; Feigelson, Boris N.
Source:
ACS Applied Materials & Interfaces 2015 v.7 no.28 pp. 15200-15205
ISSN:
1944-8252
Subject:
Gibbs free energy; X-ray diffraction; X-ray photoelectron spectroscopy; boron nitride; copper; crystal structure; foil; scanning electron microscopy
Abstract:
... Hexagonal boron nitride (h-BN) is an important material for the development of new 2D heterostructures. To enable this development, the relationship between crystal growth and the substrate orientation must be explored and understood. In this study, we simultaneously grew h-BN on different orientations of Cu substrates to establish the impact of substrate structure on the growth habit of thin h-BN ...
DOI:
10.1021/acsami.5b00723

18. Enhanced Interfacial Adhesion and Osteogenesis for Rapid “Bone-like” Biomineralization by PECVD-Based Silicon Oxynitride Overlays

Author:
Ilyas, Azhar; Lavrik, Nickolay V.; Kim, Harry K. W.; Aswath, Pranesh B.; Varanasi, Venu G.
Source:
ACS Applied Materials & Interfaces 2015 v.7 no.28 pp. 15368-15379
ISSN:
1944-8252
Subject:
X-ray absorption spectroscopy; X-ray photoelectron spectroscopy; adhesion; annealing; apatite; bioactive properties; biomineralization; bone formation; coatings; glass; humans; in vitro studies; models; nitrogen; silica; silicon; temperature; titanium dioxide; transmission electron microscopy
Abstract:
... Structurally unstable fracture sites require metal fixative devices, which have long healing times due to their lack of osteoinductivity. Bioactive glass coatings lack in interfacial bonding, delaminate, and have reduced bioactivity due to the high temperatures used for their fabrication. Here, we test the hypothesis that low-temperature PECVD amorphous silica can enhance adhesion to the underlyin ...
DOI:
10.1021/acsami.5b03319

19. Enhanced Red Upconversion Emission, Magnetoluminescent Behavior, and Bioimaging Application of NaSc0.75Er0.02Yb0.18Gd0.05F4@AuNPs Nanoparticles

Author:
Rai, Monika; Singh, Sunil Kumar; Singh, Akhilesh Kumar; Prasad, Ritika; Koch, Biplob; Mishra, Kavita; Rai, Shyam Bahadur
Source:
ACS applied materials 2015 v.7 no.28 pp. 15339-15350
ISSN:
1944-8252
Subject:
cytotoxicity; energy transfer; humans; image analysis; lung neoplasms; nanogold; nanoparticles; particle size; uterine cervical neoplasms
Abstract:
... The present study reports significant enhancement in the red upconversion emission of Er³⁺ in NaSc₀.₈Er₀.₀₂Yb₀.₁₈F₄ upconversion nanoparticles (UCNPs), via a two step process, (i) codoping of Gd³⁺ ion at Sc³⁺ site and (ii) attaching gold nanoparticles (AuNPs) at the surface of these codoped nanostructures, and further probes the use of these Gd:UCNPs@AuNPs for bioimaging application. The Gd³⁺ codo ...
DOI:
10.1021/acsami.5b03218

20. Enhancing the Energy Density of Asymmetric Stretchable Supercapacitor Based on Wrinkled CNT@MnO2 Cathode and CNT@polypyrrole Anode

Author:
Tang, Qianqiu; Chen, Mingming; Yang, Chongyang; Wang, Wenqiang; Bao, Hua; Wang, Gengchao
Source:
ACS Applied Materials & Interfaces 2015 v.7 no.28 pp. 15303-15313
ISSN:
1944-8252
Subject:
anodes; carbon nanotubes; cathodes; electrolytes; energy density; hydrogels; manganese dioxide; nanoparticles; polyacrylamide; silica; stickiness; tensile strength
Abstract:
... With the advantages of high stickiness and stretchability of the hydrogel electrolyte as well as the resilient properties of film electrodes, the facile “prestrain-stick-release” strategy can be utilized for the assembly of a stretchable supercapacitor. Two major issues of concern are the relatively low mechanical strength of the hydrogel electrolyte and the low energy density of the assembled dev ...
DOI:
10.1021/acsami.5b03148