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Content Provider | IEEE Xplore Digital Library |
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Author | Daihua Zhang Chao Li Xiaolei Liu Song Han Tao Tang Chongwu Zhou |
Copyright Year | 2003 |
Description | Author affiliation: Dept. of Electr. Eng. - Electrophys., Southern California Univ., Los Angeles, CA, USA (Daihua Zhang; Chao Li; Xiaolei Liu; Song Han; Tao Tang; Chongwu Zhou) |
Abstract | Single crystalline In/sub 2/O/sub 3/ nanowires were synthesized and then utilized to construct field effect transistors (FETs) consisting of individual nanowires. Chemical sensors based on these In/sub 2/O/sub 3/ nanowire FETs have been demonstrated. Upon exposure to gaseous molecules such as NO/sub 2/ and NH/sub 3/, the electrical conductance of the In/sub 2/O/sub 3/ nanowire FETs is found to be dramatically modified, accompanied by substantial shifts in the threshold gate voltage. Our In/sub 2/O/sub 3/ nanowire sensors exhibit significantly improved sensitivity to NO/sub 2/ gas, as well as shortened response times compared to most existing solid-state gas sensors. In addition, NH/sub 3/ gas sensing properties of In/sub 2/O/sub 3/ nanowires have also been carefully studied. Change of conductance in opposite directions was observed with different nanowire sensors. We suggest that this differential response is caused by various doping concentrations in the semiconducting In/sub 2/O/sub 3/ nanowires. |
Sponsorship | IEEE Nanotechnol. Council IEEE Region 6 Western USA |
Starting Page | 44 |
Ending Page | 47 |
File Size | 421127 |
Page Count | 4 |
File Format | |
ISBN | 0780379764 |
DOI | 10.1109/NANO.2003.1231710 |
Language | English |
Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Publisher Date | 2003-08-12 |
Publisher Place | USA |
Access Restriction | Subscribed |
Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Subject Keyword | Indium Nanowires FETs Gas detectors Crystallization Chemical sensors Threshold voltage Delay Solid state circuits Semiconductor device doping |
Content Type | Text |
Resource Type | Article |
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