Laser-induced actuation of individual microsize liquid metal droplets on an open solid surface

被引：2
|
作者：
Liu, Wei [1 ]
Wang, Chunqing [1 ]
Dou, Guangbin [2 ]
Tian, Yanhong [1 ]
Yang, Lei [1 ]
机构：
[1] Harbin Inst Technol, State Key Lab Adv Welding & Joining, Harbin 150001, Peoples R China
[2] Imperial Coll London, Elect & Elect Engn, London SW7 2AZ, England
来源：
APPLIED PHYSICS EXPRESS | 2017年 / 10卷 / 01期
基金：
中国国家自然科学基金;
关键词：
MOTIONS;
D O I：
10.7567/APEX.10.017202
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The actuation of microsize liquid metal droplets on an open solid surface with laser offset heating is reported in this work. The process allows the droplets to move towards the laser beam center. The analysis of the actuations showed that the droplets were predominantly driven by the thermally induced wettability alteration on the solid; in contrast, Marangoni flow and vapor recoil weakened the motion of the droplets. This indicates that a localized thermal gradient was the driving force for droplet motion and suggests that it may be an alternative actuation technique in manipulating liquid metal droplets for microsystems. (C) 2017 The Japan Society of Applied Physics
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页数：4
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