Tuning surface plasmon absorption in Au:Ag -alloy polymer nanocomposite free standing films

被引：0
|
作者：
Karthikeyan, B. [1 ]
机构：
[1] Natl Inst Technol, Dept Phys, Tiruchirappalli 620015, Tamil Nadu, India
来源：
NANOPHOTONIC MATERIALS VIII | 2011年 / 8094卷
关键词：
D O I：
10.1117/12.890028
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
This letter contains, synthesis procedure and optical properties of Au, Ag and Au:Ag -PVA nanocomposite polymer films. Various sizes of metallic nanoparticles and bimetallic nanoparticles are prepared through polyol method in ambient condition. Polyvinyl alcohol polymer is used as a reducing and capping agent. Prepared films show different colour due to the presence of different kind/shape and size of nanoparticles. Optical absorption studies show the characteristic surface plasmon absorption of Au, Ag are at 532 and 410 nm. For Au: Ag films, depending upon the concentration, the spectra show the absorption at different wavelengths. Thermal annealing of films show the size increases for Au and Ag nanoparticles but for bimetallic it forms alloy and core shell like nanoparticles. Optical absorption is analyzed based on the Mie theory.
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页数：7
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