Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Characteristics of Nano-Size Au Fine Particles Doped TiO2 Thin Films by Sol-Gel Method

졸-겔법에 의한 나노크기 Au 미립자 분산 TiO2 박막의 특성

  • Park, Min-Jung (Department of Materials Science and Engineering, Kyungnam University) ;
  • Koo, Se-Na (Department of Materials Science and Engineering, Kyungnam University) ;
  • Lee, Kyoung-Seok (Department of Materials Science and Engineering, Kyungnam University) ;
  • Mun, Chong-Soo (Department of Advanced Materials Engineering, Kyungnam University)
  • 박민정 (경남대학교 대학원 재료공학과) ;
  • 구세나 (경남대학교 대학원 재료공학과) ;
  • 이경석 (경남대학교 대학원 재료공학과) ;
  • 문종수 (경남대학교 신소재공학과)
  • Published : 2006.02.01
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Abstract

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.

Keywords

References

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