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You searched for: Journal Journal of the American Chemical Society Remove constraint Journal: Journal of the American Chemical Society Publication Year 2017 Remove constraint Publication Year: 2017 Subject carbon nanotubes Remove constraint Subject: carbon nanotubes
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1. Chemical Gating of a Synthetic Tube-in-a-Tube Semiconductor

Author:
Ng Allen L.; Chen Chien-Fu; Kwon Hyejin; Peng Zhiwei; Lee Cheng. S.; Wang YuHuang
Source:
Journal of the American Chemical Society 2017 v.139 no.8 pp. 3045-3051
ISSN:
1520-5126
Subject:
biomarkers; carbon nanotubes; electrodes; semiconductors; tuberculosis
Abstract:
... A critical challenge to translating field effect transistors into biochemical sensor platforms is the requirement of a gate electrode, which imposes restrictions on sensor device architectures and results in added expense, poorer scalability, and electrical noise. Here we show that it is possible to eliminate the need of the physical gate electrode and dielectrics altogether using a synthetic tube ...
DOI:
10.1021/jacs.6b12111
PubMed:
28169545
PubMed Central:
PMC5335872

2. Chirality-Selective Functionalization of Semiconducting Carbon Nanotubes with a Reactivity-Switchable Molecule

Author:
Powell Lyndsey R.; Kim Mijin; Wang YuHuang
Source:
Journal of the American Chemical Society 2017 v.139 no.36 pp. 12533-12540
ISSN:
1520-5126
Subject:
carbon; carbon nanotubes; isomers; moieties; optical isomerism; pH; photoluminescence; thermodynamics
Abstract:
... Chirality-selective functionalization of semiconducting single-walled carbon nanotubes (SWCNTs) has been a difficult synthetic goal for more than a decade. Here we describe an on-demand covalent chemistry to address this intriguing challenge. Our approach involves the synthesis and isolation of a chemically inert diazoether isomer that can be switched to its reactive form in situ by modulation of ...
DOI:
10.1021/jacs.7b05906
PubMed:
28844140
PubMed Central:
PMC6016552

3. Defect-Induced Near-Infrared Photoluminescence of Single-Walled Carbon Nanotubes Treated with Polyunsaturated Fatty Acids

Author:
Chiu Cheuk Fai; Saidi Wissam A.; Kagan Valerian E.; Star Alexander
Source:
Journal of the American Chemical Society 2017 v.139 no.13 pp. 4859-4865
ISSN:
1520-5126
Subject:
DNA; biocompatibility; carbon nanotubes; drugs; hydroperoxides; hydrophobicity; image analysis; lipid peroxidation; photoluminescence; photooxidation; polymers; polyunsaturated fatty acids; proteins; surfactants; therapeutics
Abstract:
... Single-walled carbon nanotubes (SWCNTs) have been incorporated in many emerging applications in the biomedical field including chemical sensing, biological imaging, drug delivery, and photothermal therapy. To overcome inherent hydrophobicity and improve their biocompatibility, pristine SWCNTs are often coated with surfactants, polymers, DNA, proteins, or lipids. In this paper, we report the effect ...
DOI:
10.1021/jacs.7b00390
PubMed:
28288512
PubMed Central:
PMC6540762

4. Determination of Enantiomeric Purity of Single-Wall Carbon Nanotubes Using Flavin Mononucleotide

Author:
Wei Xiaojun; Tanaka Takeshi; Hirakawa Takuya; Yomogida Yohei; Kataura Hiromichi
Source:
Journal of the American Chemical Society 2017 v.139 no.45 pp. 16068-16071
ISSN:
1520-5126
Subject:
aqueous solutions; carbon nanotubes; chromatography; circular dichroism spectroscopy; dispersants; enantiomers; gels; mixing; wavelengths
Abstract:
... Although enantiomeric separation of single-wall carbon nanotubes is possible, their enantiomeric purity (EP) remains an issue due to a lack of effective evaluation methods. In this work, we report the EP of (6,5) carbon nanotube enantiomers using flavin mononucleotide (FMN) as an enantiomer-sensitive dispersant. The enantiomers (6,5) and (11,–5) were separated by a gel column chromatography method ...
DOI:
10.1021/jacs.7b09142

5. Direct Microscopic Analysis of Individual C60 Dimerization Events: Kinetics and Mechanisms

Author:
Satoshi Okada; Satori Kowashi; Luca Schweighauser; Kaoru Yamanouchi; Koji Harano; Eiichi Nakamura
Source:
Journal of the American Chemical Society 2017 v.139 no.50 pp. 18281-18287
ISSN:
1520-5126
Subject:
activation energy; carbon nanotubes; cations; cycloaddition reactions; dimerization; ionization; reaction kinetics; statistical analysis; transmission electron microscopy
Abstract:
... Modern transition state theory states that the statistical behavior of a chemical reaction is the sum of individual chemical events that occur randomly. Statistical analysis of each event for individual molecules in a three-dimensional space however is practically impossible. We report here that kinetics and mechanisms of chemical reactions can be investigated by using a one-dimensional system whe ...
DOI:
10.1021/jacs.7b09776

6. Enhanced Photoelectrochemical Performance of Cuprous Oxide/Graphene Nanohybrids

Author:
Kecsenovity Egon; Endrődi Balázs; Tóth Péter S.; Zou Yuqin; Dryfe Robert A. W.; Rajeshwar Krishnan; Janáky Csaba
Source:
Journal of the American Chemical Society 2017 v.139 no.19 pp. 6682-6692
ISSN:
1520-5126
Subject:
carbon dioxide; carbon nanotubes; cuprous oxide; dielectric spectroscopy; electrochemistry; electron microscopy; energy conversion; engineering; foams; graphene; nanocrystals; semiconductors; solar energy; standard operating procedures; surface area
Abstract:
... Combination of an oxide semiconductor with a highly conductive nanocarbon framework (such as graphene or carbon nanotubes) is an attractive avenue to assemble efficient photoelectrodes for solar fuel generation. To fully exploit the possible synergies of the hybrid formation, however, precise knowledge of these systems is required to allow rational design and morphological engineering. In this pap ...
DOI:
10.1021/jacs.7b01820
PubMed:
28460518
PubMed Central:
PMC5456415

7. General Oriented Formation of Carbon Nanotubes from Metal–Organic Frameworks

Author:
Jiashen Meng; Chaojiang Niu; Linhan Xu; Jiantao Li; Xiong Liu; Xuanpeng Wang; Yuzhu Wu; Xiaoming Xu; Wenyi Chen; Qi Li; Zizhong Zhu; Dongyuan Zhao; Liqiang Mai
Source:
Journal of the American Chemical Society 2017 v.139 no.24 pp. 8212-8221
ISSN:
1520-5126
Subject:
carbon; carbon nanotubes; coordination polymers; crystals; density functional theory; energy conversion; nanoparticles; oxygen; pyrolysis; synergism
Abstract:
... Carbon nanotubes (CNTs) are of great interest for many potential applications because of their extraordinary electronic, mechanical and structural properties. However, issues of chaotic staking, high cost and high energy dissipation in the synthesis of CNTs remain to be resolved. Here we develop a facile, general and high-yield strategy for the oriented formation of CNTs from metal–organic framewo ...
DOI:
10.1021/jacs.7b01942

8. Ionic Strength-Mediated Phase Transitions of Surface-Adsorbed DNA on Single-Walled Carbon Nanotubes

Author:
Salem Daniel P.; Gong Xun; Liu Albert Tianxiang; Koman Volodymyr B.; Dong Juyao; Strano Michael S.
Source:
Journal of the American Chemical Society 2017 v.139 no.46 pp. 16791-16802
ISSN:
1520-5126
Subject:
adhesion; ascorbic acid; carbon nanotubes; colloids; cytosine; dissolved oxygen; fluorescence; ionic strength; models; nanoparticles; oligonucleotides; optical properties; oxygen; pH; phase transition; phosphates; riboflavin; single-stranded DNA
Abstract:
... Single-stranded DNA oligonucleotides have unique, and in some cases sequence-specific molecular interactions with the surface of carbon nanotubes that remain the subject of fundamental study. In this work, we observe and analyze a generic, ionic strength-mediated phase transition exhibited by over 25 distinct oligonucleotides adsorbed to single-walled carbon nanotubes (SWCNTs) in colloidal suspens ...
DOI:
10.1021/jacs.7b09258

9. Observation of the Marcus Inverted Region of Electron Transfer from Asymmetric Chemical Doping of Pristine (n,m) Single-Walled Carbon Nanotubes

Author:
Kunai Yuichiro; Liu Albert Tianxiang; Cottrill Anton L.; Koman Volodymyr B.; Liu Pingwei; Kozawa Daichi; Gong Xun; Strano Michael S.
Source:
Journal of the American Chemical Society 2017 v.139 no.43 pp. 15328-15336
ISSN:
1520-5126
Subject:
carbon nanotubes; electric power; electron transfer; energy; models; optical isomerism
Abstract:
... The concept of electrical energy generation based on asymmetric chemical doping of single-walled carbon nanotube (SWNT) papers is presented. We explore 27 small, organic, electron-acceptor molecules that are shown to tune the output open-circuit voltage (VOC) across three types of pristine SWNT papers with varying (n,m) chirality distributions. A considerable enhancement in the observed VOC, from ...
DOI:
10.1021/jacs.7b04314

10. The Performance of Nanoparticulate Graphitic Carbon Nitride as an Amphiphile

Author:
Xu Jingsan; Antonietti Markus
Source:
Journal of the American Chemical Society 2017 v.139 no.17 pp. 6026-6029
ISSN:
1520-5126
Subject:
carbon nanotubes; carbon nitride; colloids; drying; emulsions; graphene; hydrophobicity; semiconductors; solvents
Abstract:
... Graphitic carbon nitride (g-C₃N₄), a polymeric semiconductor that finds potential applications in multiple areas, is shown to feature amphiphilic behavior. Since the feasibility of g-C₃N₄ aqueous colloids is well-established, g-C₃N₄ can be viewed as an effective and well-accessible colloidal amphiphile. Its activity at different interfaces (liquid–liquid, liquid–solid, and liquid–air) is illustrat ...
DOI:
10.1021/jacs.6b11346

11. Photoelectrochemical Behavior of a Molecular Ru-Based Water-Oxidation Catalyst Bound to TiO2-Protected Si Photoanodes

Author:
Matheu Roc; Moreno-Hernandez Ivan A.; Sala Xavier; Gray Harry B.; Brunschwig Bruce S.; Llobet Antoni; Lewis Nathan S.
Source:
Journal of the American Chemical Society 2017 v.139 no.33 pp. 11345-11348
ISSN:
1520-5126
Subject:
carbon nanotubes; catalysts; electrodes; lighting; oxidation; oxygen production; pH; silicon; titanium dioxide
Abstract:
... A hybrid photoanode based on a molecular water oxidation precatalyst was prepared from TiO₂-protected n- or p⁺-Si coated with multiwalled carbon nanotubes (CNT) and the ruthenium-based water oxidation precatalyst [Ruᴵⱽ(tda)(py-pyr)₂(O)], 1(O) (tda²– is [2,2′:6′,2″-terpyridine]-6,6″-dicarboxylato and py-pir is 4-(pyren-1-yl)-N-(pyridin-4-ylmethyl)butanamide). The Ru complex was immobilized by π–π s ...
DOI:
10.1021/jacs.7b06800

12. Role of Organic Solvents in Immobilizing Fungus Laccase on Single-Walled Carbon Nanotubes for Improved Current Response in Direct Bioelectrocatalysis

Author:
Wu Fei; Su Lei; Yu Ping; Mao Lanqun
Source:
Journal of the American Chemical Society 2017 v.139 no.4 pp. 1565-1574
ISSN:
1520-5126
Subject:
acetone; acetonitrile; biosensors; carbon nanotubes; catalytic activity; circular dichroism spectroscopy; dimethyl sulfoxide; electrodes; ethanol; fungi; infrared spectroscopy; laccase; microbial fuel cells; oxygen; reflectance; solvents
Abstract:
... Improving bioelectrocatalytic current response of redox enzymes on electrodes has been a focus in the development of enzymatic biosensors and biofuel cells. Herein a mediatorless electroreduction of oxygen is effectively improved in terms of a remarkable enhancement by ca. 600% in maximum reductive current by simply adding 20% ethanol into laccase solution during its immobilization onto single-wal ...
DOI:
10.1021/jacs.6b11469

13. Self-Templated Formation of Interlaced Carbon Nanotubes Threaded Hollow Co3S4 Nanoboxes for High-Rate and Heat-Resistant Lithium–Sulfur Batteries

Author:
Chen Tao; Zhang Zewen; Cheng Baorui; Chen Renpeng; Hu Yi; Ma Lianbo; Zhu Guoyin; Liu Jie; Jin Zhong
Source:
Journal of the American Chemical Society 2017 v.139 no.36 pp. 12710-12715
ISSN:
1520-5126
Subject:
batteries; carbon nanotubes; cathodes; chemical bonding; electrochemistry; energy; energy density; nanocomposites; sulfur; synergism; temperature
Abstract:
... Lithium–sulfur batteries (Li–S) have attracted soaring attention due to the particularly high energy density for advanced energy storage system. However, the practical application of Li–S batteries still faces multiple challenges, including the shuttle effect of intermediate polysulfides, the low conductivity of sulfur and the large volume variation of sulfur cathode. To overcome these issues, her ...
DOI:
10.1021/jacs.7b06973

14. Single Cell Electrochemiluminescence Imaging: From the Proof-of-Concept to Disposable Device-Based Analysis

Author:
Valenti Giovanni; Scarabino Sabina; Goudeau Bertrand; Lesch Andreas; Jović Milica; Villani Elena; Sentic Milica; Rapino Stefania; Arbault Stéphane; Paolucci Francesco; Sojic Neso
Source:
Journal of the American Chemical Society 2017 v.139 no.46 pp. 16830-16837
ISSN:
1520-5126
Subject:
antibodies; carbon nanotubes; cell membranes; electrochemiluminescence; electrochemistry; electrodes; fluorescence; fluorescent dyes; free radicals; image analysis; membrane proteins; microscopy; neoplasm cells; neoplasms
Abstract:
... We report here the development of coreactant-based electrogenerated chemiluminescence (ECL) as a surface-confined microscopy to image single cells and their membrane proteins. Labeling the entire cell membrane allows one to demonstrate that, by contrast with fluorescence, ECL emission is only detected from fluorophores located in the immediate vicinity of the electrode surface (i.e., 1–2 μm). Then ...
DOI:
10.1021/jacs.7b09260

15. Site-Specific One-to-One Click Coupling of Single Proteins to Individual Carbon Nanotubes: A Single-Molecule Approach

Author:
Freeley Mark; Worthy Harley L.; Ahmed Rochelle; Bowen Ben; Watkins Daniel; Macdonald J. Emyr; Zheng Ming; Jones D. Dafydd; Palma Matteo
Source:
Journal of the American Chemical Society 2017 v.139 no.49 pp. 17834-17840
ISSN:
1520-5126
Subject:
atomic force microscopy; azides; bioengineering; carbon nanotubes; fluorescence; green fluorescent protein
Abstract:
... We report the site-specific coupling of single proteins to individual carbon nanotubes (CNTs) in solution and with single-molecule control. Using an orthogonal Click reaction, Green Fluorescent Protein (GFP) was engineered to contain a genetically encoded azide group and then bound to CNT ends in different configurations: in close proximity or at longer distances from the GFP’s functional center. ...
DOI:
10.1021/jacs.7b07362

16. Sub-4 nm PtZn Intermetallic Nanoparticles for Enhanced Mass and Specific Activities in Catalytic Electrooxidation Reaction

Author:
Qi Zhiyuan; Xiao Chaoxian; Liu Cong; Goh Tian Wei; Zhou Lin; Maligal-Ganesh Raghu; Pei Yuchen; Li Xinle; Curtiss Larry A.; Huang Wenyu
Source:
Journal of the American Chemical Society 2017 v.139 no.13 pp. 4762-4768
ISSN:
1520-5126
Subject:
carbon nanotubes; catalysts; fuel cells; hydroxyl radicals; methanol; methodology; nanoparticles; oxidation; porous media; prediction; silica; temperature; zinc
Abstract:
... Atomically ordered intermetallic nanoparticles (iNPs) have sparked considerable interest in fuel cell applications by virtue of their exceptional electronic and structural properties. However, the synthesis of small iNPs in a controllable manner remains a formidable challenge because of the high temperature generally required in the formation of intermetallic phases. Here we report a general metho ...
DOI:
10.1021/jacs.6b12780

17. Tuning Product Selectivity for Aqueous CO2 Reduction with a Mn(bipyridine)-pyrene Catalyst Immobilized on a Carbon Nanotube Electrode

Author:
Reuillard Bertrand; Ly Khoa H.; Rosser Timothy E.; Kuehnel Moritz F.; Zebger Ingo; Reisner Erwin
Source:
Journal of the American Chemical Society 2017 v.139 no.41 pp. 14425-14435
ISSN:
1520-5126
Subject:
aqueous solutions; carbon dioxide; carbon monoxide; carbon nanotubes; catalysts; catalytic activity; electrochemistry; electrodes; electrolysis; formates; manganese; renewable energy sources; ultraviolet-visible spectroscopy
Abstract:
... The development of high-performance electrocatalytic systems for the controlled reduction of CO₂ to value-added chemicals is a key goal in emerging renewable energy technologies. The lack of selective and scalable catalysts in aqueous solution currently hampers the implementation of such a process. Here, the assembly of a [MnBr(2,2′-bipyridine)(CO)₃] complex anchored to a carbon nanotube electrode ...
DOI:
10.1021/jacs.7b06269
PubMed:
28885841
PubMed Central:
PMC5649446