Oxygen-chemical agent sensor

Details Oxygen-chemical agent sensor Oxygen-chemical agent sensor

2005-07-20

2009-10-06

Olsen, Kaj K (Department: 1795)

Chemistry: electrical and wave energy

Apparatus

Electrolytic

C204S431000, C205S775000, C977S957000, C422S082010

Reexamination Certificate

active

07597788

ABSTRACT:
A gas sensing mechanism and a gas sensor based on a semiconducting carbon nanotube diode structure are disclosed. The gas sensor operates by detecting the change in conductivity characteristic of the current vs. voltage behavior of an I—N, or I—P junction, in the carbon nanotube. In the presence of electrophilic gas species at the I—N junction, or nucleophilic gas species at the I—P junction, a P—N, or N—P, junction is created by doping of the carbon nanotube by the respective gas species. The resulting change from the undoped, instrinsic i-type to p-type, or n-type, creates a diode structure whose conductivity characteristics can be measured with high accuracy and selectivity.

REFERENCES:
patent: 5572031 (1996-11-01), Cooper et al.
patent: 6528020 (2003-03-01), Dai et al.
patent: 6946693 (2005-09-01), Scheible et al.
patent: 7052588 (2006-05-01), Gu et al.
patent: 2003/0089899 (2003-05-01), Lieber et al.
Sotiris Sotiropoulos et al., “Solid-state microelectrode oxygen sensors,”Analytica Chimica Acta, 388, 1999, pp. 51-62.
“Appendix B About Hydrocarbons,”Aviation Fuels Technical Review, 2000, pp. 82-85.
Philip G. Collins et al., “Extreme Oxygen Sensitivity of Electronic Properties of Carbon Nanotubes,”Science, Mar. 10, 2000, vol. 287, pp. 1801-1804.
George E. Froudakis et al., “Pathways for oxygen adsorption on single-wall carbon nanotubes,”Physical Review, B 68, 2003, pp. 1-5.
Andrea Goldoni et al., “Single-Wall Carbon Nanotube Interaction with Gases: Sample Contaminants and Environmental Monitoring,”JACS Articles, 2003, 125, pp. 11329-11333.
M. Grujicic et al., “The effect of topological defects and oxygen adsorption on the electronic transport properties of single-walled carbon-nanotubes,”Applied Surface Science, 211 2003, pp. 166-183.
Jing Kong et al., “Chemical profiling of single nanotubes: Intramolecular p-n-p junctions and on tube single-electron transistors,”Applied Physics Letters, vol. 80, No. 1, Jan. 7, 2002, pp. 73-75.
Kwanyong Seo et al., “Tuning Chirality of Single-Wall Carbon Nanotubes by Selective Etching with Carbon Dioxide,”JACS Communications, 2003, 125, 13946-13947.
J.P. Novak, et al., “Nerve agent detection using networks of single-walled carbon nanotubes,”Applied Physics Letters, vol. 83, No. 19, Nov. 10, 2003, pp. 4026-4028.
De Castro et al., “Reliable, maintenance-free oxygen sensor for aircraft using an oxygen-sensitive coating on potentiometric electrodes,”. Abstract, p. 1, 1990, available via the Internet at http://www.stormingmedia.us/69/6962/A696222.html.
Hendrik Ulbricht et al., “Interaction of molecular oxygen with single-wall carbon nanotube bundles and graphite,”Surface Science, 532-535, 2003, pp. 852-856.
Stephen P. Walch, “On the reaction of N and O atoms with carbon nanotubes,”Chemical Physics Letters, 374, 2003, pp. 501-505.
Chongwu Zhou et al., “Modulated Chemical Doping of Individual Carbon Nanotubes,”Science, vol. 290, Nov. 24, 2000, pp. 1552-1555.
J.P. Novak et al., “Nerve Agent Detection Using Networks of Single-Walled Carbon Nanotubes,”Applied Physics Letters, vol. 83, No. 19, Nov. 10, 2003, pp. 4026-4028.
Chongwu Zhou et al., “Modulated Chemical Doping of Individual Carbon Nanotubes,”Science, vol. 290, Nov. 24, 2000, pp. 1552-1555.
S. Chopra et al., “Carbon-nanotube-based resonant-circuit sensor for ammonia,”Applied Physics Letters, vol. 80, No. 24, Jun. 17, 2002, pp. 4632-4634.
Jing Kong et al., “Chemical profiling of single nanotubes: Intramolecular p-n-p junctions and on-tube single-electron transistors,”Applied Physics Letters, vol. 80, No. 1, Jan. 17, 2002, pp. 73-75.
Phillip G. Collins et al., “Extreme Oxygen Sensitivity of Electronic Properties of Carbon Nanotubes,”Science, vol. 287, Mar. 10, 2000, pp. 1801-1804.

Affiliated with

Also associated with

Rating

Oxygen-chemical agent sensor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Oxygen-chemical agent sensor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Oxygen-chemical agent sensor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4140444