Study on the Electrical and Thermal Conductivity of Ordered Mesoporous TiO₂ Thin Film Incorporated with Pt Nanoparticles

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概要

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• Ordered mesoporous TiO₂ films with incorporated Pt nanoparticles were prepared using titanium tetraisopropoxide, hexachloroplatinic acid hexahydrate, and Pluronic P-123 as a titania precursor, a Pt precursor, and a structure-directing agent, respectively. Pt nanoparticles were introduced to enhance the electrical properties of the mesoporous films, which have excellent thermal insulation properties. We confirmed that the synthesized composite films with Pt nanoparticles had an ordered pore structure with anatase phase TiO₂ by both small-angle and wide-angle X-ray diffraction analyses. Although the porosity of the composite film decreased from 37.6 to 29.3% when Pt nanoparticles were included, the conductivity ratio ($\sigma/\kappa$) of the film increased greatly, up to approximately 1370 K V-2, due to the greater increase in electrical conductivity than thermal conductivity. Based on our results, we conclude that by incorporating Pt nanoparticles into ordered mesoporous TiO₂ film, the thermoelectric properties of the mesoporous films can be improved.

• 2011-07-25

著者

• SEO Won-Seon

  Korea Institute of Ceramic Engineering and Technology

• Park Hyung-ho

  Department Of Ceramic Engineering Yonsei University

• CHOI Yong-June

  Department of Materials Science and Engineering, Yonsei University

• Cho Hyung

  School of Mechanical Engineering, Yonsei University, Seoul 120-749, Korea

• Lim Young

  Korea Institute of Ceramic Engineering and Technology, Seoul 153-801, Korea

• Ha Tae-Jung

  Department of Materials Science and Engineering, Yonsei University, Seoul 120-749, Korea

• Jung Sin-Young

  Department of Materials Science and Engineering, Yonsei University, Seoul 120-749, Korea

• Shin Sangwoo

  School of Mechanical Engineering, Yonsei University, Seoul 120-749, Korea

• Cho Hyung

  School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon 440-746, Korea

• Seo Won-Seon

  Korea Institute of Ceramic Engineering and Technology, Seoul 153-801, Korea

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