Gas sensing properties of single crystalline ZnO nanowires grown by thermal evaporation technique

Prabhakar Rai; Rizwan Khan; Rafiq Ahmad; Yoon Bong Hahn; In Hwan Lee; Yeon Tae Yu

doi:10.1016/j.cap.2013.06.005

Gas sensing properties of single crystalline ZnO nanowires grown by thermal evaporation technique

Prabhakar Rai, Rizwan Khan, Rafiq Ahmad, Yoon Bong Hahn, In Hwan Lee, Yeon Tae Yu

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

27 Citations (Scopus)

Abstract

The ZnO NWs were applied as effective material for the fabrication of ethanol (C₂H₅OH) and carbon monoxide (CO) gas sensor. The ZnO NWs were grown by thermal evaporation techniques on non-catalytic Si (100) substrates. The average width and length of ZnO NWs was 60 nm and 20 μm, respectively and they were single crystalline in nature. The maximum response was 51.64 at 300 C for 1000 ppm of CO gas, while 104.23 at 400 C for 250 ppm of ethanol gas. The response of ZnO NWs was very high for ethanol compared to the CO, whereas the recovery time for ethanol was very poor compare to CO gas. The response of ZnO NWs was about 25 times higher for ethanol compare to CO, at 400 C for 100 ppm of each gas. The high response for ethanol is related to electron donating effect of ethanol (10e^-) which was higher than the CO gas (2e^-). The high response of ZnO NWs was attributed to large contacting surface area for electrons, oxygen, target gas molecule, and abundant channels for gas diffusion.

Original language	English
Pages (from-to)	1769-1773
Number of pages	5
Journal	Current Applied Physics
Volume	13
Issue number	8
DOIs	https://doi.org/10.1016/j.cap.2013.06.005
Publication status	Published - 2013
Externally published	Yes

Keywords

CO
Ethanol
Gas sensor
Response
ZnO nanowires

ASJC Scopus subject areas

Materials Science(all)
Physics and Astronomy(all)

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10.1016/j.cap.2013.06.005

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title = "Gas sensing properties of single crystalline ZnO nanowires grown by thermal evaporation technique",

abstract = "The ZnO NWs were applied as effective material for the fabrication of ethanol (C2H5OH) and carbon monoxide (CO) gas sensor. The ZnO NWs were grown by thermal evaporation techniques on non-catalytic Si (100) substrates. The average width and length of ZnO NWs was 60 nm and 20 μm, respectively and they were single crystalline in nature. The maximum response was 51.64 at 300 C for 1000 ppm of CO gas, while 104.23 at 400 C for 250 ppm of ethanol gas. The response of ZnO NWs was very high for ethanol compared to the CO, whereas the recovery time for ethanol was very poor compare to CO gas. The response of ZnO NWs was about 25 times higher for ethanol compare to CO, at 400 C for 100 ppm of each gas. The high response for ethanol is related to electron donating effect of ethanol (10e-) which was higher than the CO gas (2e-). The high response of ZnO NWs was attributed to large contacting surface area for electrons, oxygen, target gas molecule, and abundant channels for gas diffusion.",

keywords = "CO, Ethanol, Gas sensor, Response, ZnO nanowires",

author = "Prabhakar Rai and Rizwan Khan and Rafiq Ahmad and Hahn, {Yoon Bong} and Lee, {In Hwan} and Yu, {Yeon Tae}",

note = "Funding Information: This paper was supported by research funds of Chonbuk National University in 2012 and National Research Foundation (NRF) grant funded by the Korea government (MEST) ( NRF-2010-0019626 , 2009-0093263, 20/2R/A2AA01006787 ). Copyright: Copyright 2013 Elsevier B.V., All rights reserved.",

year = "2013",

doi = "10.1016/j.cap.2013.06.005",

language = "English",

volume = "13",

pages = "1769--1773",

journal = "Current Applied Physics",

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AU - Rai, Prabhakar

AU - Khan, Rizwan

AU - Ahmad, Rafiq

AU - Hahn, Yoon Bong

AU - Lee, In Hwan

AU - Yu, Yeon Tae

N1 - Funding Information: This paper was supported by research funds of Chonbuk National University in 2012 and National Research Foundation (NRF) grant funded by the Korea government (MEST) ( NRF-2010-0019626 , 2009-0093263, 20/2R/A2AA01006787 ). Copyright: Copyright 2013 Elsevier B.V., All rights reserved.

PY - 2013

Y1 - 2013

N2 - The ZnO NWs were applied as effective material for the fabrication of ethanol (C2H5OH) and carbon monoxide (CO) gas sensor. The ZnO NWs were grown by thermal evaporation techniques on non-catalytic Si (100) substrates. The average width and length of ZnO NWs was 60 nm and 20 μm, respectively and they were single crystalline in nature. The maximum response was 51.64 at 300 C for 1000 ppm of CO gas, while 104.23 at 400 C for 250 ppm of ethanol gas. The response of ZnO NWs was very high for ethanol compared to the CO, whereas the recovery time for ethanol was very poor compare to CO gas. The response of ZnO NWs was about 25 times higher for ethanol compare to CO, at 400 C for 100 ppm of each gas. The high response for ethanol is related to electron donating effect of ethanol (10e-) which was higher than the CO gas (2e-). The high response of ZnO NWs was attributed to large contacting surface area for electrons, oxygen, target gas molecule, and abundant channels for gas diffusion.

AB - The ZnO NWs were applied as effective material for the fabrication of ethanol (C2H5OH) and carbon monoxide (CO) gas sensor. The ZnO NWs were grown by thermal evaporation techniques on non-catalytic Si (100) substrates. The average width and length of ZnO NWs was 60 nm and 20 μm, respectively and they were single crystalline in nature. The maximum response was 51.64 at 300 C for 1000 ppm of CO gas, while 104.23 at 400 C for 250 ppm of ethanol gas. The response of ZnO NWs was very high for ethanol compared to the CO, whereas the recovery time for ethanol was very poor compare to CO gas. The response of ZnO NWs was about 25 times higher for ethanol compare to CO, at 400 C for 100 ppm of each gas. The high response for ethanol is related to electron donating effect of ethanol (10e-) which was higher than the CO gas (2e-). The high response of ZnO NWs was attributed to large contacting surface area for electrons, oxygen, target gas molecule, and abundant channels for gas diffusion.

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KW - Gas sensor

KW - Response

KW - ZnO nanowires

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Gas sensing properties of single crystalline ZnO nanowires grown by thermal evaporation technique

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