Carbon nanotube sensor

Details Carbon nanotube sensor Carbon nanotube sensor

2006-06-06

2006-06-06

Deb, Anjan (Department: 2858)

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

C324S464000

Reexamination Certificate

active

07057402

ABSTRACT:
Carbon nanotubes are formed on projections on a substrate. A metal, such as nickel is deposited on the substrate with optional platforms, and heated to form the projections. Carbon nanotubes are formed from the projections by heating in an ethylene, methane or CO atmosphere. A heat sensor is also formed proximate the carbon nanotubes. When exposed to IR radiation, the heat sensor detects changes in temperature representative of the IR radiation. In a gas sensor, a thermally isolated area, such as a pixel is formed on a substrate with an integrated heater. A pair of conductors each have a portion adjacent a portion of the other conductor with projections formed on the adjacent portions of the conductors. Multiple carbon nanotubes are formed between the conductors from one projection to another. IV characteristics of the nanotubes are measured between the conductors in the presence of a gas to be detected.

REFERENCES:
patent: 6097138 (2000-08-01), Nakamoto
patent: 6140045 (2000-10-01), Wohlstadter et al.
patent: 6445006 (2002-09-01), Brandes et al.
“Nanotube Molecular Wires as Chemical Sensors”, Science vol. 287 pp. 622-625, Kong et al.

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