Title :
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
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;
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
DOI :
10.1109/NMDC.2006.4388815
