Abstract
SnO2 single crystals (columnar crystals and silver grass-like nanowhiskers) were synthesized by selective microwave heating of a TiO 2-SnO2 mixture. The shape of the as-grown SnO2 crystals is strongly dependent on the atmosphere during microwave irradiation. This is due to the difference in growth mechanisms, as revealed by in-situ surface observation under microwave irradiation, in addition to scanning and transmission electron microscopy observations of irradiated specimens. In a N2 atmosphere, silver grass-like SnO2 nanowhiskers were obtained. On the other hand, columnar SnO2 crystals were obtained in air or an O2 atmosphere. Photoluminescence and absorption spectra of the as-grown SnO2 crystals were examined. Based on the analysis of a TiO2-SnO2 pellet, it was found that the bottom was selectively heated, and SnO2 sublimated by microwave irradiation. A density gradient texture of the sample pellet was formed.
| Original language | English |
|---|---|
| Pages (from-to) | 879-884 |
| Number of pages | 6 |
| Journal | Materials Transactions |
| Volume | 49 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2008 Apr |
Keywords
- Color center
- Microstructural control
- Selective microwave heating
- SnO nanowhiskers
- SnO single crystal
- TiO- SnO
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering