Self-Assembled Photonic Crystals of ZnO Microspheres with Surface Dispersed Gold Nanoparticles and Their Surface Plasmon Resonance Effects

• Main Author: 蔡亞螢
• Other Authors: 駱榮富
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/42079651650789645529

碩士 === 逢甲大學 === 材料科學與工程學系 === 103 === There are three key components in this study including (a) fabrication of narrowly size-distributed zinc oxide microsphere by sol-gel process, (b) production of photonic crystals (PhC) of ZnO microspheres via isothermal heating evaporation induced self-assembly (IHEISA) and electrophoretic self-assembly (EPSA) technique, and (c) formation of gold (Au) nanoparticles with various sizes by chemical reduction method and dispersed Au particles in PhC templates was used as target for surface-enhanced Raman scattering (SERS) effect. Our results strongly indicated that uniform ZnO microsphere with various sizes (120~360 nm) were produced by sol-gel, and the well-arrangement ZnO PhCs templates were formed by IHEISA method. We obtained Au nanoparticles with various sizes (avg. 12~28 nm) via chemical reduction method and then dispersed the Au particles on the PhCs of ZnO microspheres, which demonstrated high aspect ratio through aerodynamic spraying method. The results showed that the well-dispersed Au nanoparticles evenly dispersed into the surfaces and voids of PhCs templates displayed more than 30 times of signal enhancement due to SERS effect as compared the samples without PhC substrates.