Sequential deposition of overlapping droplets to form a liquid line
Sequential deposition of overlapping droplets to form a liquid line
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DOI：
10.1017/jfm.2014.621
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发表时间：
2014-11
影响因子：
3.7
通讯作者：
A. Thompson;Carl R. Tipton;A. Juel;A. Hazel;Mark C. Dowling
中科院分区：
文献类型：
--
作者：
A. Thompson;Carl R. Tipton;A. Juel;A. Hazel;Mark C. Dowling
摘要 微滴沉积是一项涵盖从组织工程到微电子学应用的技术。我们新的高速成像测量揭示了重叠液滴在平坦均匀基底上的顺序线性沉积如何导致中等接触角的显着不均匀形态。我们开发了一个简单的物理模型，首次逐滴捕获撞击后的动力学：表面张力驱动液体重新分布，接触角滞后是初始不均匀性的基础，而粘性效应则导致随后的周期性变化。
Abstract Microdroplet deposition is a technology that spans applications from tissue engineering to microelectronics. Our new high-speed imaging measurements reveal how sequential linear deposition of overlapping droplets on flat uniform substrates leads to striking non-uniform morphologies for moderate contact angles. We develop a simple physical model, which for the first time captures the post-impact dynamics drop-by-drop: surface-tension drives liquid redistribution, contact-angle hysteresis underlies initial non-uniformity, while viscous effects cause subsequent periodic variations.