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硅表面微结构对表面润湿方向性影响的分子动力学研究 被引量：2

Effects of surface microstructure on wetting direction of silicon substrates by molecular dynamics study
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摘要 采用分子动力学方法研究了硅表面微结构对表面润湿方向性的影响,采用3种不同的微结构探讨了水滴在表面上的扩散方向问题,以及微结构尺寸对表面润湿性的影响.研究结果表明,表面微结构宽度存在临界宽度值,当微结构宽度小于临界宽度时表面表现为疏水性,反之,亲水性增强;在疏水性表面上,水的铺展性表现为各向同性,水滴稳定后俯视图近似为圆形,在亲水性表面,水的铺展性表现为各向异性,表面微结构形状不同,水滴稳定后呈现不同的特殊形状. Molecular dynamics simulation is used to study the wetting effects of silicon surface mi-crostructure on the wetting direction of microstructure.The spreading direction of water droplets on surfaces of three different microstructures,together with the influence of the size of micro-structures on the surface,are discussed.The results show that there is a critical width value for different micro-structures.A hydrophobic surface is formed when the microstructure width is smaller than its critical size.Otherwise,a hydrophilic surface is formed.When a surface is hydrophobic,the spread of wa-ter droplet is isotropic,showing a sphere shape approximately in a top view after it is stable.When a surface is hydrophilic,the micro-droplet spreads anisotropically,leading to different special steady shapes due to the difference of microstructure shape.
作者 王玉娟 郭亚杰 裘英华 陈云飞
机构地区 东南大学机械工程学院 东南大学江苏省微纳生物医疗器械设计与制造重点实验室
出处 《东南大学学报（自然科学版）》 EI CAS CSCD 北大核心 2014年第6期1161-1165,共5页 Journal of Southeast University：Natural Science Edition
基金 国家自然科学基金资助项目(51345012)
关键词 分子动力学 表面润湿性 表面微结构 molecular dynamics surface wetting surface micro-structure
分类号 TH117.2 [机械工程—机械设计及理论]
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参考文献16

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二级参考文献18

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共引文献18

同被引文献20

引证文献2

二级引证文献10

东南大学学报（自然科学版）
2014年 第6期

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