Evaporation of Saline Droplets on a Superhydrophobic Substrate: Formation of Crystal Shell and "Legs".
Evaporation of Saline Droplets on a Superhydrophobic Substrate: Formation of Crystal Shell and "Legs".
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DOI：
10.3390/ma16145168
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发表时间：
2023-07-22
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我们研究了沉积在超疏水基材上的无水乙酸钠 (CH3COONa) 水溶液液滴中蒸发驱动的结晶。结果揭示了在相同的实验条件下饱和和不饱和液滴之间不同的结晶行为。具体来说，不饱和液滴可以在超疏水基底上形成准球形晶体壳，而饱和液滴可以在晶体壳形成时在液滴和基底之间形成晶腿。随后，饱和的液滴通过生长的晶腿从基板上升起。晶壳的形成与液滴表面的蒸发和液滴内部的对流密切相关。晶腿的形成是由SiO2纳米颗粒基质引起的异质成核效应诱导的。这些发现为通过调整盐溶液浓度和基材表面结构来调节盐结晶的形态提供了有价值的见解。
We studied the evaporation-driven crystallization in the droplets of sodium acetate anhydrous (CH3COONa) aqueous solution, which were deposited on superhydrophobic substrates. The results reveal distinct crystallization behaviors between saturated and unsaturated droplets under identical experimental conditions. Specifically, unsaturated droplets could form a quasi-spherical crystal shell on the superhydrophobic substrate, while saturated droplets could develop crystal legs between the droplet and substrate when the crystal shell formed. Subsequently, the saturated droplet was lifted off the substrate by the growing crystal legs. The formation of crystal shell was closely associated with the evaporation from the droplet surface and the internal convection inside the droplet. The formation of crystal legs was induced by the heterogeneous nucleation effect caused by the substrate of SiO2 nanoparticles. These findings provide valuable insights into regulating the morphology of salt crystallization through adjustments in salt solution concentration and substrate surface structure.
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DOI：
10.3390/ma16113989
发表时间：
2023-05-26
期刊：
Materials (Basel, Switzerland)
影响因子：
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通讯作者：
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影响因子：
4.6
作者：
Desarnaud J;Bonn D;Shahidzadeh N
通讯作者：
Shahidzadeh N
影响因子：
3.9
作者：
Dash, Susmita;Garimella, Suresh V.
通讯作者：
Garimella, Suresh V.
影响因子：
3.1
作者：
Ensikat HJ;Ditsche-Kuru P;Neinhuis C;Barthlott W
通讯作者：
Barthlott W
通过无电沉积或电沉积轻松制备具有分级微纳米结构的超疏水 Bi/Bi2O3 表面
影响因子：
6.7
作者：
Cao, Ling;Lu, Xiaoqing;Li, Zelin
通讯作者：
Li, Zelin