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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Amphoteric doping of carbon nanotubes by encapsulation of organic molecules: Electronic properties and quantum conductance
Vincent Meunier,Bobby G. Sumpter +1 more
TL;DR: Large-scale quantum electronic structure calculations coupled with a Green's function formulation for determining the quantum conductance suggest that the electronic structure of a carbon nanotube can be easily manipulated by encapsulating appropriate organic molecules.
Journal ArticleDOI
Nitrogen and boron doping effects on the electrical conductivity of graphene and nanotube
Hamze Mousavi,Rostam Moradian +1 more
TL;DR: In this paper, the effects of nitrogen and boron doping on the density of states and the temperature dependence of the electrical conductivity of graphene plane and (10,0) single-walled carbon nanotube are studied.
Journal ArticleDOI
Localized charge trapping due to adsorption in nanotube field-effect transistor and its field-mediated transport
H. Lin,Sandip Tiwari +1 more
TL;DR: In this paper, the authors report that pulsed measurements, with a time constant below 500μs, provide reproducible characteristics of carbon nanotube field effect transistor with minimal hysteresis.
Journal ArticleDOI
Adsorption sensitivity of Pd-doped SWCNTs to small gas molecules
TL;DR: In this paper, the adsorption of three types of gas molecules (SO 2, CH 3 OH, and CH 4 ) on to Pd-doped (5,5) single-walled carbon nanotubes (Pd-SWCNTs) has been investigated within density functional theory.
Journal ArticleDOI
Carbon nanotubes and their toxicity
Amit K. Jain,Neelesh Kumar Mehra,Neeraj Lodhi,Vaibhav Dubey,Dinesh Mishra,Parijat Jain,Narendra K. Jain +6 more
TL;DR: The article underlines the various surface modifications on carbon nanotubes and its role in imparting biocompatibility to the CNTs, further suggesting their utility as a safer delivery module for bioactives.
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.