Journal ArticleDOI
Extreme oxygen sensitivity of electronic properties of carbon nanotubes
TLDR
The results, although demonstrating that nanotubes could find use as sensitive chemical gas sensors, likewise indicate that many supposedly intrinsic properties measured on as-prepared nanotube may be severely compromised by extrinsic air exposure effects.Abstract:
The electronic properties of single-walled carbon nanotubes are shown here to be extremely sensitive to the chemical environment. Exposure to air or oxygen dramatically influences the nanotubes' electrical resistance, thermoelectric power, and local density of states, as determined by transport measurements and scanning tunneling spectroscopy. These electronic parameters can be reversibly "tuned" by surprisingly small concentrations of adsorbed gases, and an apparently semiconducting nanotube can be converted into an apparent metal through such exposure. These results, although demonstrating that nanotubes could find use as sensitive chemical gas sensors, likewise indicate that many supposedly intrinsic properties measured on as-prepared nanotubes may be severely compromised by extrinsic air exposure effects.read more
Citations
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Fast-Response, Sensitivitive and Low-Powered Chemosensors by Fusing Nanostructured Porous Thin Film and IDEs-Microheater Chip
TL;DR: A new sensor structure via the fusion of metal-oxide nanoporous films and micro-electro-mechanical systems (MEMS)-based sensing chip is presented, demonstrating mW-level low power, ultrafast response, and parts-per-billion lever detection for ethanol gas.
Journal ArticleDOI
Adsorption of NH3 and NO2 on single-walled carbon nanotubes
TL;DR: In this paper, the interaction of NH3 and NO2 with heterogeneous bundles of carbon single-walled nanotubes (SWNTs) has been studied using FTIR spectroscopy and temperature-programmed desorption (TPD).
Journal ArticleDOI
Preparation and characterization of gas-sensitive composites from multi-walled carbon nanotubes/polystyrene
TL;DR: In this paper, a new kind of conductive polymer composites was fabricated by in situ polymerization of styrene (PS) in the presence of multi-walled carbon nanotubes (MWCNTs) and solution mixing of polystyrene with MWCNTs, respectively.
Journal ArticleDOI
Photoinduced oxidation of carbon nanotubes
T. Savage,Sriparna Bhattacharya,B. Sadanadan,Jay Gaillard,Terry M. Tritt,Ya-Ping Sun,Yudong Wu,Saroj K. Nayak,Roberto Car,Nicola Marzari,Pulickel M. Ajayan,Apparao M. Rao +11 more
TL;DR: In this article, photo-induced molecular desorption of oxygen has been reported in carbon nanotubes using thermopower measurements, and two plausible mechanisms for the experimentally observed photoinduced oxidation are proposed: (i) a lower energy barrier for photo-generated singlet oxygen, or (ii) due to the presence of defects in carbon Nanotubes.
Journal ArticleDOI
Oxygen-induced p-type doping of a long individual single-walled carbon nanotube
TL;DR: In this paper, a transport measurement showed that a long individual single-walled nanotube can be doped as p-type upon oxygen adsorption, and the effect of O2 adaption on a nanotubes-based field effect transistor was investigated.
References
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Journal ArticleDOI
Crystalline Ropes of Metallic Carbon Nanotubes
Andreas Thess,R. S. Lee,Pavel Nikolaev,Hongjie Dai,Pierre Petit,J. Robert,Chunhui Xu,Young Hee Lee,Seong-Gon Kim,Andrew G. Rinzler,Daniel T. Colbert,Gustavo E. Scuseria,David Tománek,John E. Fischer,Richard E. Smalley +14 more
TL;DR: X-ray diffraction and electron microscopy showed that fullerene single-wall nanotubes (SWNTs) are nearly uniform in diameter and that they self-organize into “ropes,” which consist of 100 to 500 SWNTs in a two-dimensional triangular lattice with a lattice constant of 17 angstroms.
Book
Science of fullerenes and carbon nanotubes
TL;DR: In this paper, the authors present a detailed overview of the properties of Fullerenes and their properties in surface science applications, such as scanning tunnel microscopy, growth and fragmentation studies, and chemical synthesis.
Journal ArticleDOI
Storage of hydrogen in single-walled carbon nanotubes
A. C. Dillon,Kim M. Jones,T. A. Bekkedahl,Ching-Hwa Kiang,Donald S. Bethune,Michael J. Heben +5 more
TL;DR: In this article, a gas can condense to high density inside narrow, single-walled nanotubes (SWNTs) under conditions that do not induce adsorption within a standard mesoporous activated carbon.
Journal ArticleDOI
New one-dimensional conductors: Graphitic microtubules.
TL;DR: It is predicted that carbon microtubules exhibit striking variations in electronic transport, from metallic to semiconducting with narrow and moderate band gaps, depending on the diameter of the tubule and on the degree of helical arrangement of the carbon hexagons.
Journal ArticleDOI
Individual single-wall carbon nanotubes as quantum wires
Sander J. Tans,Michel Devoret,Hongjie Dai,Andreas Thess,Richard E. Smalley,L.J. Geerligs,Cees Dekker +6 more
TL;DR: In this article, electrical transport measurements on individual single-wall nanotubes have been performed to confirm the theoretical predictions of single-walled nanotube quantum wires, and they have been shown to act as genuine quantum wires.