선택적 가스 센서를 위한 Au 나노입자가 장식된 TiO2 나노튜브의 합성

Well-ordered TiO2 nanotubes with Au nanoparticles are a desirable configuration to enhance the gas sensing properties such as response and selectivity due to their high surface area to volume ratio and catalytic effect of Au nanoparticles. We have synthesized the well-ordered TiO2 nanotubes directly on a Pt IDEs patterned SiO2/Si substrate and then decorated Au nanoparticles on inner and outer surface of TiO2 nanotubes using electrodeposition method. The Au-decorated TiO2 nanotubes shows ultrahigh response to C2H5OH and the highest increasing ratio to H2 compared with other gases.