Sensitivity-tuned CO gas sensors with tailored ga-doping in ZnO nanowires

Kyoungwon Kim; Deuk Hee Lee; Dawoon Jeong; Pulak Chandra Debnath; Dong Yun Lee; Sangsig Kim; Sang Yeol Lee

doi:10.1166/jnn.2012.5936

Sensitivity-tuned CO gas sensors with tailored ga-doping in ZnO nanowires

Kyoungwon Kim, Deuk Hee Lee, Dawoon Jeong, Pulak Chandra Debnath, Dong Yun Lee, Sangsig Kim, Sang Yeol Lee

School of Electrical Engineering

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

Sensitivity-customization of zinc oxide (ZnO) nanowire (NW) gas sensors has been demonstrated by controlling Ga-doping, thereby tuning the resistance of the NWs. Both un-doped and 5 weight% Ga-doped ZnO (GZO) NWs are synthesized for the highly sensitive sensing within a narrow detection window and a less sensitive one within an expanded window, respectively. We have employed hot-walled pulsed laser deposition (HW-PLD) for the NW synthesis. With CO gas injection, the resistance reduction of NWs is detected and analyzed in a self-designed gas chamber that guarantees the precise control of gas flow and, gas concentration, as well as temperature. NW sensitivity is proportional to the sensing temperature and inversely proportional to the doping concentration resulting in widening the sensing window up to 230 times by the 5 wt.% Ga-doping.

Original language	English
Pages (from-to)	4211-4214
Number of pages	4
Journal	Journal of Nanoscience and Nanotechnology
Volume	12
Issue number	5
DOIs	https://doi.org/10.1166/jnn.2012.5936
Publication status	Published - 2012

Keywords

CO Gas Sensor
Ga-Doped ZnO
Nanowires

ASJC Scopus subject areas

Bioengineering
Chemistry(all)
Biomedical Engineering
Materials Science(all)
Condensed Matter Physics

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10.1166/jnn.2012.5936

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title = "Sensitivity-tuned CO gas sensors with tailored ga-doping in ZnO nanowires",

abstract = "Sensitivity-customization of zinc oxide (ZnO) nanowire (NW) gas sensors has been demonstrated by controlling Ga-doping, thereby tuning the resistance of the NWs. Both un-doped and 5 weight% Ga-doped ZnO (GZO) NWs are synthesized for the highly sensitive sensing within a narrow detection window and a less sensitive one within an expanded window, respectively. We have employed hot-walled pulsed laser deposition (HW-PLD) for the NW synthesis. With CO gas injection, the resistance reduction of NWs is detected and analyzed in a self-designed gas chamber that guarantees the precise control of gas flow and, gas concentration, as well as temperature. NW sensitivity is proportional to the sensing temperature and inversely proportional to the doping concentration resulting in widening the sensing window up to 230 times by the 5 wt.% Ga-doping.",

keywords = "CO Gas Sensor, Ga-Doped ZnO, Nanowires",

author = "Kyoungwon Kim and Lee, {Deuk Hee} and Dawoon Jeong and Debnath, {Pulak Chandra} and Lee, {Dong Yun} and Sangsig Kim and Lee, {Sang Yeol}",

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doi = "10.1166/jnn.2012.5936",

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AU - Kim, Kyoungwon

AU - Lee, Deuk Hee

AU - Jeong, Dawoon

AU - Debnath, Pulak Chandra

AU - Lee, Dong Yun

AU - Kim, Sangsig

AU - Lee, Sang Yeol

PY - 2012

Y1 - 2012

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AB - Sensitivity-customization of zinc oxide (ZnO) nanowire (NW) gas sensors has been demonstrated by controlling Ga-doping, thereby tuning the resistance of the NWs. Both un-doped and 5 weight% Ga-doped ZnO (GZO) NWs are synthesized for the highly sensitive sensing within a narrow detection window and a less sensitive one within an expanded window, respectively. We have employed hot-walled pulsed laser deposition (HW-PLD) for the NW synthesis. With CO gas injection, the resistance reduction of NWs is detected and analyzed in a self-designed gas chamber that guarantees the precise control of gas flow and, gas concentration, as well as temperature. NW sensitivity is proportional to the sensing temperature and inversely proportional to the doping concentration resulting in widening the sensing window up to 230 times by the 5 wt.% Ga-doping.

KW - CO Gas Sensor

KW - Ga-Doped ZnO

KW - Nanowires

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Sensitivity-tuned CO gas sensors with tailored ga-doping in ZnO nanowires

Abstract

Keywords

ASJC Scopus subject areas

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