Metallic Nanostructure for Plasmon-Enhanced Photocatalytic Water Splitting

• Main Authors: Kuang-Sheng Chung, 鍾光聖
• Other Authors: 蔡定平
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/49165915006200887190

碩士 === 國立臺灣大學 === 物理研究所 === 101 === This essay is based on the phenomenon about surface plasmon resonance (SPR), which happens to free electron in nanostructured metal when irradiated EM wave, and its application in enhancing photocatalysis material, Titanium dioxide. Surface plasmon is the behavior of collective electron oscillation at the metal/dielectric interface, and if surface plasmon couple with incident photon, it becomes surface plasmon polaritons (SPPs) and would propagate along the surface; the other case is localized surface plasmon resonance (LSPR), which usually excited by light in metallic nanoparticles, and both of SPPs and LSPR would have novel properties such as turning the incident light into near field intensive EM wave. Thus, surface plasmon is regarded as one of the new approaches to enhance photovoltaics materials by some scholars. Starting from this point, here we combine Titanium dioxide and nanostructured metal, Ag nanoparticles/spacer/Au thin film, and self-developed method to fabricate large grating Au film, to test the idea of plasmonic photovoltaics devices. By measuring the photocatalysis performance, the controversial idea and debates about the mechanism is much more clarified, and a new structure to enhance photovoltaics material by the coupling of surface plasmon is proposed in this essay, separately.