Optical properties of metallic coating layers on ordered polystyrene particle films via Langmuir‐Blodgett technology

• Main Authors: Lin-Jiun Chiou, 邱麟鈞
• Other Authors: Ching-Ling Hsu
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/79014901238649495307

碩士 === 中原大學 === 應用物理研究所 === 97 === We constructed close-packed monolayer films through　Langmuir-Blodgett technology with different sizes of colloidal　polystyrene (PS) particles. In order to keep away from obtaining split-up polystyrene particle films and acquire large ordered area　of films, particles surfaces were functionalized hydrophobically.Then, the monolayer films were coated with 50 nm silver by thermal evaporation. By taking into account experimental data　from the optical transmittance, we studied the optical behavior.By using xenon light source with different angles of incidence, the relation between the resonance absorption and the differenceparticle sizes was observed. 　　The optical transmittance spectra show the localized surfaceplasmon effect, and the　individual peaks are blue shifted　with the particle size getting smaller. According to the Maxwell’s　dispersion formula, the result did not match as expected.It is a more complicated structures than the subwave-length hole　arrays.