Temperature-induced evolution of novel mixture-phased particles at the tips of SnO2 whiskers
- Authors
- Kim, Sang Sub; Choi, Sun-Woo; Lee, Chongmu; Yang, Ju Chan; Na, Han Gil; Kwak, Dong Sub; Kim, Hyoun Woo
- Issue Date
- Jan-2012
- Publisher
- Elsevier BV
- Keywords
- Tin oxide; Nanostructures; Gas sensors; Whiskers
- Citation
- Chemical Engineering Journal, v.179, pp 381 - 387
- Pages
- 7
- Indexed
- SCI
SCIE
SCOPUS
- Journal Title
- Chemical Engineering Journal
- Volume
- 179
- Start Page
- 381
- End Page
- 387
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/166498
- DOI
- 10.1016/j.cej.2011.10.084
- ISSN
- 1385-8947
1873-3212
- Abstract
- A mixture of Sn, In, and Ge powders was thermally evaporated to synthesize SnO2 whiskers. Elevation of the growth temperature from 800 degrees C to 900 degrees C contributed to the generation of mixture-phased particles at the tips of whickers, due to the change of the dominant growth mechanism from base-growth vapor-liquid-solid (VLS) to a tip-growth VLS process. We observed that the particles were comprised of a mixture of tetragonal SnO2, rhomboheclral In2O3, and hexagonal GeO2. The composite materials exhibited stable and reproducible sensing properties with respect to NO2 and CO.
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