揭示飞秒激光辐照玻璃-金属纳米复合材料中纳米颗粒的纵横比。

Revealing the nanoparticles aspect ratio in the glass-metal nanocomposites irradiated with femtosecond laser.

作者信息

Chervinskii S, Drevinskas R, Karpov D V, Beresna M, Lipovskii A A, Svirko Yu P, Kazansky P G

机构信息

Institute of Photonics, University of Eastern Finland, P.O.Box 111 Joensuu, FI-80101 Finland.

Institute of Physics, Nanotechnology and Telecommunications, Peter the Great St. Petersburg Polytechnic University, 29 Polytechnicheskaya, St. Petersburg, 195251 Russia.

出版信息

Sci Rep. 2015 Sep 8;5:13746. doi: 10.1038/srep13746.

DOI:10.1038/srep13746

PMID:26348691

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4562248/

Abstract

We studied a femtosecond laser shaping of silver nanoparticles embedded in soda-lime glass. Comparing experimental absorption spectra with the modeling based on Maxwell Garnett approximation modified for spheroidal inclusions, we obtained the mean aspect ratio of the re-shaped silver nanoparticles as a function of the laser fluence. We demonstrated that under our experimental conditions the spherical shape of silver nanoparticles changed to a prolate spheroid with the aspect ratio as high as 3.5 at the laser fluence of 0.6 J/cm2. The developed approach can be employed to control the anisotropy of the glass-metal composites.

摘要

我们研究了飞秒激光对嵌入钠钙玻璃中的银纳米颗粒的形貌塑造。将实验吸收光谱与基于针对椭球形夹杂物修正的麦克斯韦-加内特近似的模型进行比较，我们得到了重塑后的银纳米颗粒的平均纵横比与激光能量密度的函数关系。我们证明，在我们的实验条件下，银纳米颗粒的球形在激光能量密度为0.6 J/cm²时变为纵横比高达3.5的长椭球体。所开发的方法可用于控制玻璃-金属复合材料的各向异性。