An experimental and computational study of high speed two-particle impacts of Ag nanoparticles
An experimental and computational study of high speed two-particle impacts of Ag nanoparticles
复制标题
银纳米粒子高速双粒子撞击的实验和计算研究
DOI：
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发表时间：
2019
影响因子：
3.2
通讯作者：
Desiderio Kovar
中科院分区：
文献类型：
--
作者：
T. V. Chitrakar;G. Noiseau;J. Keto;M. Becker;Desiderio Kovar
微粒气溶胶过程的激光烧蚀利用纳米颗粒的高速（~ 1000 m/s）冲击来产生厚膜。透射电子显微镜被用来研究几个粒子对粒子的影响事件的最终形态，努力了解高速冲击后发展的膜的微观结构和形态。一系列的颗粒形态和缺陷结构进行了观察，即使在名义上类似的影响条件下。在一些情况下，在受冲击颗粒内观察到晶界，而在其他情况下，受冲击颗粒没有晶界（即，外延沉积）。为了理解这些晶粒形态范围的原因，使用与典型实验条件类似的条件进行分子动力学模拟。模拟结果表明，碰撞粒子的最终状态不仅对碰撞速度敏感，而且粒子的结晶取向也强烈影响最终状态。这些研究结果的影响，以控制薄膜的微观结构的能力进行了讨论。
The laser ablation of the microparticle aerosol process utilizes high velocity (∼1000 m/s) impact of nanoparticles to produce thick films. Transmission electron microscopy was used to study the final morphologies of several particle-to-particle impact events in an effort to understand the film's microstructure and morphology that develop following high-speed impact. A range of particle morphologies and defect structures were observed, even under nominally similar impact conditions. In some instances, grain boundaries were observed within the impacted particles, whereas in other cases, the impacted particles were free of grain boundaries (i.e., epitaxial deposition). To understand the reasons for these ranges in grain morphologies, molecular dynamics simulations were conducted using conditions that were similar to typical experimental conditions. The simulations revealed that the final states of the impacted particles are not only sensitive to impact velocity but that particle crystallographic orientations also strongly influence the final states. The implications of these findings on the ability to control film microstructures are discussed.
透射电子显微镜
DOI：
10.1007/978-3-319-26651-0_3
发表时间：
2016
期刊：
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影响因子：
--
作者：
Burke M
通讯作者：
Burke M
铜纳米颗粒的塑性：位错枝晶引起的应变硬化和位移塑性的极限
影响因子：
3.1
作者：
Antti Tolvanen;Karsten Albe
通讯作者：
Karsten Albe