Mansour Yehia, Battie Yann, Naciri Aotmane En, Chaoui Nouari
Opt Lett. 2022 Jul 1;47(13):3255-3258. doi: 10.1364/OL.460555.
In this Letter, we propose a new, to the best of our knowledge, approach to determine the shape distribution of gold (Au) nanorods from real-time extinction spectroscopy measurements. This method is based on the linearization of the shape distribution effective medium theory (SDEMT). The aspect ratio distribution of Au colloids is obtained in a few tens of ms without any a priori information on the distribution. Both bimodal and monomodal shape distributions of nanoparticles can be extracted by analyzing their extinction spectra. The proposed method is applied to monitor the change in the nanoparticle shape during their exposure to ns-laser pulses.
在本信函中，据我们所知，我们提出了一种全新的方法，用于从实时消光光谱测量中确定金（Au）纳米棒的形状分布。该方法基于形状分布有效介质理论（SDEMT）的线性化。无需关于分布的任何先验信息，就能在几十毫秒内获得金胶体的纵横比分布。通过分析纳米颗粒的消光光谱，可提取出纳米颗粒的双峰和单峰形状分布。所提出的方法用于监测纳米颗粒在暴露于纳秒激光脉冲期间其形状的变化。
