Mechanism of pulse laser interaction with colloidal nanoparticles
Mechanism of pulse laser interaction with colloidal nanoparticles
复制标题
DOI：
10.1002/lpor.201300013
复制
发表时间：
2013-07-01
影响因子：
11
通讯作者：
Tsuji, Takeshi
中科院分区：
文献类型：
--
作者：
Pyatenko, Alexander;Wang, Hongqiang;Tsuji, Takeshi
激光器是现代纳米科学和纳米技术中非常强大和非常有用的仪器。为了控制激光加工不同的纳米物体，需要了解激光束与纳米颗粒的相互作用机理。结果表明，粒子加热-熔化-蒸发模型可以成功地应用于胶体纳米粒子与脉冲激光相互作用时出现的许多现象。详细讨论了该模型的一般方法。该模型的两个主要组成部分，颗粒的光吸收，并在颗粒材料的相变热力学被认为是。特别注意的是，致力于正确估计可能的热损失。本文介绍了在激光能量密度-颗粒直径坐标系中描述颗粒材料不同相态的相图的产生方法。它示出了该模型可以如何应用于理解这样的复杂过程的机制，如颗粒尺寸减小和亚微米球形颗粒的生长，以及其他过程中发生的胶体颗粒时，由脉冲激光照射。
The laser is a very powerful and very useful instrument in modern nanoscience and nanotechnology. The knowledge of the interaction mechanism of the laser beam with nanoparticles is needed to control the laser processing of different nano-objects. It was shown that the particle heating-melting-evaporation model can be successfully applied for many phenomena arising when colloidal nanoparticle interact with pulsed laser beams. The general approach of this model is discussed in detail. The two main components of the model, light absorption by particles, and the thermodynamics of phase transitions in particulate material are considered. Special attention is devoted to the correct estimation of the possible heat losses. The way in which the phase diagrams, where the different phase conditions of particle material are presented in laser fluence-particle diameter coordinates, were produced is demonstrated. It is shown how this model can be applied for understanding the mechanism of such complicated processes as particle-size reduction and submicrometer spherical particle growth, as well as other processes that occur when colloidal particles are irradiated by a pulsed laser.