Abstract
We report the effect of inorganic impurities on the photoinduced hydrophilic conversion on ultrasmooth SrTiO3 and TiO2 single crystal surfaces. A water droplet became well spread over on a TiO 2-terminated SrTiO3(100) surface after UV irradiation, whereas it remained beaded on a SrO-terminated SrTiO3(100) surfaces. ZnP and CuO impurities deposited onto a rutile TiO2(110) surfaces were found to suppress the hydrophilic conversion with increasing amounts of ZnP and CuO. No hydrophilicity characteristic of TiO2 was observed after UV irradiation at a nominal impurity thickness of only 5 Å, indicating that the surface-exposed atomic layer plays a crucial role in photoinduced hydrophilic conversion.
| Original language | English |
|---|---|
| Pages (from-to) | L562-L564 |
| Journal | Japanese Journal of Applied Physics, Part 2: Letters |
| Volume | 46 |
| Issue number | 20-24 |
| DOIs | |
| Publication status | Published - 2007 Jun 15 |
| Externally published | Yes |
Keywords
- Hydrophilic conversion
- Rutile
- SrTiO
- TiO
- Ultrasmooth surface
ASJC Scopus subject areas
- Engineering(all)
- Physics and Astronomy (miscellaneous)
- Physics and Astronomy(all)
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Katayama, M., Miyakawa, T., Ohsawa, T., Kuwano, J., Koinuma, H., & Matsumoto, Y. (2007). Inorganic impurity effect on the photoinduced hydrophilic conversion on ultrasmooth SrTiO3 and TiO2 single crystal surfaces. Japanese Journal of Applied Physics, Part 2: Letters, 46(20-24), L562-L564. https://doi.org/10.1143/JJAP.46.L562