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제108회 대한화학회 학술발표회, 총회 및 기기전시회 안내 High-Yield Synthesis of Single Crystalline (110) TiO2 Nanowire with Rutile Strucutre

2011년 8월 1일 15시 38분 50초
Ⅳ-INOR.P-89 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
금 <발표Ⅳ>
저자 및
박이슬, 함아진, 이진석
숙명여자대학교 화학과, Korea
Nanocrystalline titanium dioxide(TiO2) has been widely studied during the past few years because of its many applications, such as electrodes for electrochemical detection, gas sensors, photocatalysis, dye-sensitization for solar cells, and solar water splitting for hydrogen production. In particular, one-dimensional(1D) TiO2 nanostructure have drawn the attention of worldwide researchers because of their unique characteristics. They have been reported in the published literature in various forms, such as nanotubes, nanowires (NWs), nanowhiskers, nanorods, nanobelts, and nonofibers. TiO2 1D nanostructures have been synthesized by ‘wet-chemistry’ methods (e.g. electrodeposition, sol-gel electrophoresis, hydrothermal methods, solvothermal methods) and ‘dry’ methods, such as thermal evaporation and metal-organic chemical vapor deposition. The ‘wet-chemistry’ processes lack the flexibility to be integrated into semiconductor device fabrication. They also require further heat treatment to improve the crystallinity of the nanostructure, which adds to the complexity of the processes. Here, we synthesized the high-yield TiO2 NWs using chemical vapor deposition (CVD) technique as ‘dry’ method. There are two processes to achieve high-yield TiO2 NWs which are different compared with previous papers. The one is that we mixed TiO powder and carbon powder to avoid aggregation of TiO powder which is used as a precursor of TiO2 NWs. The other is that we rubbed the wafer to distribute the powder evenly using mixed TiO powder with carbon powder. Comparing with conventional method of TiO2 NWs, we believe that our synthetic method can realize the high-yield single crystalline TiO2 NWs.