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Journal ArticleDOI

Extreme oxygen sensitivity of electronic properties of carbon nanotubes

Philip G. Collins, +3 more
- 10 Mar 2000 - 
- Vol. 287, Iss: 5459, pp 1801-1804
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.

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Citations
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Journal ArticleDOI

Self-assembled films of multi-wall carbon nanotubes used in gas sensors to increase the sensitivity limit for oxygen detection

TL;DR: In this paper, a self-assembly method was developed to obtain multi-wall carbon nanotube films applied in resistive gas sensor devices, which achieved a fast recovery time of 0.9 seconds at 160°C operation temperature.
Journal ArticleDOI

Fine control of carbon nanotubes-polyelectrolyte sensors sensitivity by electrostatic layer by layer assembly (eLbL) for the detection of volatile organic compounds (VOC).

TL;DR: Electrostatic layer by layer assembly (eLbL) is bringing an interesting input to tailor the sensitivity of carbon nanotubes (CNT)-polyelectrolyte sensors to VOCs for the first time.
Journal ArticleDOI

Origins and Characteristics of the Threshold Voltage Variability of Quasiballistic Single-Walled Carbon Nanotube Field-Effect Transistors

TL;DR: Analysis of experimental results from variable-temperature measurement as well as gate oxide thickness scaling studies shows that the random variation from fixed charges present on the oxide surface close to nanotubes dominates the VT variability of nanotube transistors.
Journal ArticleDOI

Noise in carbon nanotube field effect transistor

TL;DR: In this paper, the input-referred noise of carbon nanotubes increases quadratically as gate voltage is overdriven, suggesting that mobility fluctuation is the dominant mechanism contributing to the noise in carbon-nanotube field effect transistors.
Journal ArticleDOI

Binder-free nitrogen-doped graphene catalyst air-cathodes for microbial fuel cells

TL;DR: In this article, a binder-free nitrogen-doped graphene (NG) sheet in situ grown on nickel mesh was used as an efficient catalyst layer for MFC air-cathodes.
References
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Journal ArticleDOI

Crystalline Ropes of Metallic Carbon Nanotubes

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

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

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.
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