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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

Gas sensing characteristics of multi-wall carbon nanotubes

TL;DR: In this article, the gas sensing behavior of both capacitance and resistance based sensors employing multi-wall carbon nanotubes (MWNTs) as the active sensing element was studied.
Journal ArticleDOI

Gas sensor array based on metal-decorated carbon nanotubes.

TL;DR: Applications of these small-size, low-power, electronic sensor arrays are in the detection and identification of toxic/combustible gases for personal safety and air pollution monitoring.
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Gas sensors using carbon nanomaterials: A review

TL;DR: In this article, the state of the art for electrical gas sensors employing carbon nanomaterials, identifies the bottlenecks that impair their commercialisation and also some recent breakthroughs.
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Sensors for sub-ppm NO2 gas detection based on carbon nanotube thin films

TL;DR: In this article, carbon nanotubes (CNTs) deposited by plasmaenhanced chemical vapor deposition on Si3N4/Si substrates have been investigated as resistive gas sensors for NO2.
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Molecular Electronic Junctions

TL;DR: A review with 228 references on experimental investigation of conductor/molecule/metal molecular electronic junctions is presented in this paper, as characterized by scanning probe microscopy and microelectronic techniques.
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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