Department of Physics, National Institute of Technology, Tiruchirappalli 620015, India.
Spectrochim Acta A Mol Biomol Spectrosc. 2012 Oct;96:456-60. doi: 10.1016/j.saa.2012.04.019. Epub 2012 May 14.
Au, Ag and Au:Ag-PVA nanocomposite polymer films were prepared through simple, cost effective way. Various sizes of metal nanoparticles and bimetal nanoparticles were prepared through polyol method through thermal annealing. Polyvinyl alcohol polymer is used as a reducing and capping agent. Prepared films are different in color due to the presence of different kind and size of nanoparticles. Optical absorption studies reveal the characteristic surface plasmon absorption of Au, Ag are at 532 and 410 nm. The spectra of Au:Ag films show absorption centered at different wavelengths depending upon the concentration. Thermal annealing of films increased the size, alloy and bimetallic nature of the nanoparticles. Optical absorption nanocomposite film was analyzed using the Mie theory.
通过简单、经济有效的方法制备了 Au、Ag 和 Au:Ag-PVA 纳米复合聚合物薄膜。通过热退火的多元醇法制备了各种尺寸的金属纳米粒子和双金属纳米粒子。聚乙烯醇聚合物用作还原剂和封端剂。由于存在不同种类和尺寸的纳米粒子，制备的薄膜具有不同的颜色。光学吸收研究表明 Au、Ag 的特征表面等离激元吸收分别在 532nm 和 410nm。Au:Ag 薄膜的光谱显示，吸收峰的中心波长取决于浓度的不同。薄膜的热退火增加了纳米粒子的尺寸、合金和双金属性质。使用 Mie 理论分析了光学吸收纳米复合材料薄膜。
