Effect of Facets of a- Fe2O3 Nanostructures on Gas-Sensing Performance

Author

Jing Wang ; Xiaoman Zhang ; Weihong Xu ; Liang Chen ; Xingjiu Huang ; Jinhuai Liu

Author_Institution

Dept. of Mater. Sci. & Eng., Univ. of Sci. & Technol. of China, Hefei, China

fYear

2013

fDate

20-23 Aug. 2013

Firstpage

1688

Lastpage

1691

Abstract

In order to investigate the effect of different facets on gas-sensing properties, we compare the gas-sensing performance between the gas sensors made from α-Fe₂O₃ nanocubes with dominant exposed {012} facets and α-Fe₂O₃ nanoplates with dominant exposed {001} facets. The nanocube-based gas sensor shows better gas-sensing performance than the nanoplate-based sensor. The difference in the gas-sensing performance suggests that the effect of exposed facets and the size effect are crucial to gas-sensing sensitivity. These findings indicate that controlling the exposed facet of nanocrystals can be a promising method to improve the gas-sensing performance.

Keywords

gas sensors; iron compounds; nanosensors; nanostructured materials; α-Fe₂O₃ nanocubes; α-Fe₂O₃ nanoplates; α-Fe₂O₃ nanostructures; Fe₂O₃; facet effect; gas-sensing performance; size effect; {001} facets; {012} facets; Ethanol; Gas detectors; Nanostructures; Scanning electron microscopy; Temperature; Temperature sensors; Á-Fe2O3; exposed facet; gas sensor; nanocubes; nanoplates;

fLanguage

English

Publisher

ieee

Conference_Titel

Green Computing and Communications (GreenCom), 2013 IEEE and Internet of Things (iThings/CPSCom), IEEE International Conference on and IEEE Cyber, Physical and Social Computing

Conference_Location

Beijing

Type

conf

DOI

10.1109/GreenCom-iThings-CPSCom.2013.309

Filename

6682321