Jumping, nanodroplets
Jumping, nanodroplets
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DOI：
10.1126/science.1116505
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发表时间：
2005-09-23
期刊：
影响因子：
56.9
通讯作者：
Boneberg, J
中科院分区：
文献类型：
--
作者：
Habenicht, A;Olapinski, M;Boneberg, J
在惰性基底（如玻璃或石墨）上的平坦金纳米结构被单个强激光脉冲照射，其能量密度高于金。熔化阈值以这种方式产生的液体结构远离其平衡形状，并且开始去湿过程。在几纳秒的时间尺度上，液体收缩成一个球体。在这种收缩过程中，质心向上移动，这可能导致液滴由于惯性而从表面脱离。对于半径在100纳米范围内的液滴，所得到的速度为每秒10米的量级。
Flat gold nanostructures on inert substrates like glass or graphite were illuminated by single intensive laser pulses with fluences above the gold. melting threshold. The liquid structures produced in this way are far from their equilibrium shape, and a dewetting process sets in. On a time scale of a few nanoseconds, the liquid contracted toward a sphere. During this contraction, the center of mass moved upward, which could lead to detachment of droplets from the surface due to inertia. The resulting velocities were on the order of 10 meters per second for droplets with radii in the range of 100 nanometers.