High sensitivity gas sensors based on SnO2 nanowires

Author

Park, Kyung-Soo ; Choi, Young-Jin ; Hwang, In-Sung ; Park, Jae-Hwan ; Park, Jae-Gwan

Author_Institution

Mater. Sci. & Technol. Div., Korea Inst. of Sci. & Technol., Seoul

Volume

1

fYear

2006

fDate

22-25 Oct. 2006

Firstpage

458

Lastpage

459

Abstract

Network structure of SnO₂ nanowires were fabricated on the electrodes and its gas sensing propertires for NO₂ were examined. The nanowires were synthesized by thermal evaporation process at low temperature of 600~700degC. The diameter of the nanowires ranged from 50 nm to 200 nm depending on the processing temperature and the mixed oxygen content with Ar. X-ray diffraction analysis and transmission electron microscopy analysis indicated that the SnO₂ nanowires are single crystals. At the concentration of NO₂ of 20 ppm, the value of the sensitivity attaining 300, response time of 100 s, and recovery time of 200 s were observed.

Keywords

X-ray diffraction; argon; gas sensors; nanowires; nitrogen compounds; tin compounds; transmission electron microscopy; vacuum deposition; Ar; Ar - Element; NO₂; NO₂ - Interface; SnO₂; SnO₂ - Interface; X-ray diffraction analysis; gas sensors; nanowires; recovery time; response time; size 50 nm to 200 nm; temperature 600 degC to 700 degC; thermal evaporation; time 100 s; time 200 s; transmission electron microscopy; Argon; Electrodes; Electrons; Gas detectors; Nanowires; Network synthesis; Temperature dependence; Temperature distribution; Temperature sensors; X-ray diffraction; SnO2; chemical gas sensor; nanostructures;

fLanguage

English

Publisher

ieee

Conference_Titel

Nanotechnology Materials and Devices Conference, 2006. NMDC 2006. IEEE

Conference_Location

Gyeongju

Print_ISBN

978-1-4244-0540-4

Electronic_ISBN

978-1-4244-0541-1

Type

conf

DOI

10.1109/NMDC.2006.4388815

Filename

4388815