辐射诱导纳米气泡的分子动力学模拟  

Molecular Dynamics Simulation of Radiation-induced Nanobubbles

作　　者：赵畅 安巍[1] 张一帆 ZHAO Chang;AN Wei;ZHANG Yifan(College of Mechanical Engineering,Tongji University,Shanghai 201804,China)

机构地区：[1]同济大学机械与能源工程学院,上海201804

出　　处：《工程热物理学报》2024年第8期2437-2440,共4页Journal of Engineering Thermophysics

基　　金：上海市自然科学基金资助项目(No.20ZR1459600)。

摘　　要：辐射诱导下产生的纳米气泡在很多新兴产业中具有重要的应用价值;然而,在连续入射光照射下,小尺寸粒子表面气泡成核阈值高、产生气泡困难等问题限制了其在光流控、生物医学等领域中的应用。因此,本文提出将小尺寸纳米粒子组装成聚集阵列的方式,明显促进了其表面气泡的成核过程。不仅如此,当激发局域等离子共振效应时,发现局域增强电场能够进一步显著加快气泡生成。本文能够为促进纳米粒子表面气泡的成核过程提供新思路,为将小尺寸粒子应用于诸多新兴领域提供有力的理论指导。Radiation-induced nanobubbles have important applications in many emerging indus-tries such as optofluidics and biomedicine.However,their applications are severely constrained by the high bubble nucleation threshold and the challenging bubble generation on the surface of small-sized particles under continuous incident light irradiation.The results of the present work indicate that a regular-aggregated particle array can obviously facilitate the nucleation process of bubbles on their surfaces.Additionally,the results of molecular dynamics simulation show the localized enhanced electric field may further accelerate the bubble generation when the LSPR ef-fect is excited.This work provides a fresh perspective on the nucleation of nanoparticle surface bubbles as well as a theoretical direction for the use of small-sized particles in several growing domains.

关 键 词：纳米汽泡 表面等离子共振 分子模拟 

分 类 号：TK124[动力工程及工程热物理—工程热物理]