| 졸-겔법에 의한 나노크기 Au 미립자 분산 TiO2 박막의 특성 |
| 박민정, 구세나, 이경석, 문종수1 |
경남대학교 대학원 재료공학과
1경남대학교 신소재공학과 |
| Characteristics of Nano-Size Au Fine Particles Doped TiO2 Thin Films by Sol-Gel Method |
| Min-Jung Park, Se-Na Koo, Kyoung-Seok Lee, Chong-Soo Mun1 |
Department of Materials Science and Engineering, Kyungnam University
1Department of Advanced Materials Engineering, Kyungnam University |
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| ABSTRACT |
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Nano-size Au particle doped $TiO_2$ films were prepared with $Ti(OC_3H_7^i)_4$, polyvinylpyrrolidone(PVP), $HAuCl_4$ and $C_3H_7OH$ etc. by sol-gel method. $TiO_2$ gel films were obtained by the dip-coating method on the $SiO_2$ glass substrates, and then heat-treated at $700^{circ}C$ for 10 min. The thickness of $TiO_2$ films were $0.7~1.8;{mu}m$. It was found that the thickness of films prepared from PVP containing solution was about $2~8$ times higher values than that of thin films without PVP. The size of Au particles doped in the films were about $350~750;nm$. Nano-size Au particle dispersed $TiO_2$ films showed high absorption peak at visible region 450nm, which made them good candidates for non-linear optical materials and photo-catalytic materials. The contact angle of $TiO_2$ film for water was $12.5^{circ}$, and therefore it is clear that $TiO_2$ films have very high hydrophilic properties and the self-cleaning effects. |
| Key words:
Nano-size, Photo-catalysis, Contact angle, Hydrophilic, Self-cleaning effects |
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