Carbon nanotube-SnO2 composite gas sensor prepared by electron beam evaporation

Carbon nanotube (CNT) is a useful material for gas-sensing applications because of its high surface to volume ratio structure, In this work, multi-wall CNTs are incorporated into tin oxide thin film by the means of powder mixing and electron beam evaporation and the enhancement of gas-sensing proper...

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Main Authors: Wisitsoraat A., Tuantranont A., Thanachayanont C., Singjai P.
Format: Conference or Workshop Item
Language:English
Published: 2014
Online Access:http://www.scopus.com/inward/record.url?eid=2-s2.0-46149091953&partnerID=40&md5=fac57c6d762e92ef85c3d7b24f111744
http://cmuir.cmu.ac.th/handle/6653943832/5043
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Institution: Chiang Mai University
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spelling th-cmuir.6653943832-50432014-08-30T02:56:05Z Carbon nanotube-SnO2 composite gas sensor prepared by electron beam evaporation Wisitsoraat A. Tuantranont A. Thanachayanont C. Singjai P. Carbon nanotube (CNT) is a useful material for gas-sensing applications because of its high surface to volume ratio structure, In this work, multi-wall CNTs are incorporated into tin oxide thin film by the means of powder mixing and electron beam evaporation and the enhancement of gas-sensing properties is presented. The CNTs were combined with SnO2 powder with varying concentration in the range of 0.25-5% by weight and electron beam evaporated onto glass substrates. From AFM and TEM characterization, CNT inclusion in SnO2 thin film results in the production of circular cone protrusions of CNT clusters or single tube coated with SnO2 layer. Experimental results indicate that the sensitivity to ethanol of SnO2 thin film increases by the factors of 3-6. However, if the CNT concentration is too high, the sensitivity is decreased. Moreover, the CNT doped film can operate with good sensitivity and stability at a relatively low temperature of 250-300°C. The improved gas-sensing properties should be attributed to the increasing of metal oxide surface adsorption area produced by CNT protrusion. © 2006 IEEE. 2014-08-30T02:56:05Z 2014-08-30T02:56:05Z 2006 Conference Paper 1424401402; 9781424401406 10.1109/NEMS.2006.334813 72400 http://www.scopus.com/inward/record.url?eid=2-s2.0-46149091953&partnerID=40&md5=fac57c6d762e92ef85c3d7b24f111744 http://cmuir.cmu.ac.th/handle/6653943832/5043 English
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
language English
description Carbon nanotube (CNT) is a useful material for gas-sensing applications because of its high surface to volume ratio structure, In this work, multi-wall CNTs are incorporated into tin oxide thin film by the means of powder mixing and electron beam evaporation and the enhancement of gas-sensing properties is presented. The CNTs were combined with SnO2 powder with varying concentration in the range of 0.25-5% by weight and electron beam evaporated onto glass substrates. From AFM and TEM characterization, CNT inclusion in SnO2 thin film results in the production of circular cone protrusions of CNT clusters or single tube coated with SnO2 layer. Experimental results indicate that the sensitivity to ethanol of SnO2 thin film increases by the factors of 3-6. However, if the CNT concentration is too high, the sensitivity is decreased. Moreover, the CNT doped film can operate with good sensitivity and stability at a relatively low temperature of 250-300°C. The improved gas-sensing properties should be attributed to the increasing of metal oxide surface adsorption area produced by CNT protrusion. © 2006 IEEE.
format Conference or Workshop Item
author Wisitsoraat A.
Tuantranont A.
Thanachayanont C.
Singjai P.
spellingShingle Wisitsoraat A.
Tuantranont A.
Thanachayanont C.
Singjai P.
Carbon nanotube-SnO2 composite gas sensor prepared by electron beam evaporation
author_facet Wisitsoraat A.
Tuantranont A.
Thanachayanont C.
Singjai P.
author_sort Wisitsoraat A.
title Carbon nanotube-SnO2 composite gas sensor prepared by electron beam evaporation
title_short Carbon nanotube-SnO2 composite gas sensor prepared by electron beam evaporation
title_full Carbon nanotube-SnO2 composite gas sensor prepared by electron beam evaporation
title_fullStr Carbon nanotube-SnO2 composite gas sensor prepared by electron beam evaporation
title_full_unstemmed Carbon nanotube-SnO2 composite gas sensor prepared by electron beam evaporation
title_sort carbon nanotube-sno2 composite gas sensor prepared by electron beam evaporation
publishDate 2014
url http://www.scopus.com/inward/record.url?eid=2-s2.0-46149091953&partnerID=40&md5=fac57c6d762e92ef85c3d7b24f111744
http://cmuir.cmu.ac.th/handle/6653943832/5043
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