Temporal and spatial temperature modelling for understanding pulsed laser induced solution based nanomanufacturing
Temporal and spatial temperature modelling for understanding pulsed laser induced solution based nanomanufacturing
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DOI：
10.1088/1361-6528/ab8c09
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发表时间：
2020-08-07
期刊：
影响因子：
3.5
通讯作者：
Liu, C. Richard
中科院分区：
文献类型：
--
作者：
Liu, Siyu;Ou, Chun-yu;Liu, C. Richard
近年来，脉冲激光在溶液基纳米制造的靶向合成中显示出巨大的潜力，在空间、时间和能量输入上实现了高精度和高精度。独特的脉冲激光诱导温度历史对于了解相关原理和实现沉积的精确控制是必不可少的。本研究建立了一个热传递模型，并应用该模型预测了脉冲激光诱导温度变化在反应部位的时间演变和空间分布。以化学沉积ZnO晶体为例，研究了激光参数、加热条件与沉积晶体特性之间的关系。发现脉冲激光诱导的峰值温度和热积累会影响沉积晶体的数目、密度和尺寸。成核数密度分布与空间温度分布成正比，与晶体尺寸成反比。所提出的传热模型是理解结晶原理的重要工具，对促进脉冲激光器作为一种新的研究、设计、制造和控制工具具有重要意义。
Recently, pulsed lasers have demonstrated great potential in targeted synthesis in solution based nanomanufacturing, realizing high precision and accuracy in space, time and energy input. The unique temperature history induced by pulsed lasers is indispensable to understand the related fundamentals and to realize the precision control of deposition. In this study a heat transfer model was developed and applied to predict the temporal evolution and the spatial distribution of pulsed laser induced temperature change across the reaction sites. Chemically deposited ZnO crystals were studied as an example, showing the relationships among laser parameters and heating conditions, and deposited crystal characteristics. Peak temperature and heat accumulation induced by pulsed laser were found to affect deposited crystal number density and size. The nucleation number density distribution was found to be correlated with the spatial temperature distribution and inversely proportional to the crystal size. The presented heat transfer model is a crucial tool to understand crystallization fundamentals and it is essential for facilitating pulsed laser as a new tool for research, design, manufacturing and control.