Surface structure and wettability tuning of porous silicon films by capillary-driven surface texturing under different current densities of electrochemical etching | |
Wang FG(王富国); Cao ZY(曹忠跃); Liang AM(梁爱民); Zhang XK(张兴凯); Qiang L(强力); Zhang JY(张俊彦); Zhang JY(张俊彦) | |
刊名 | Materials Letters |
2018 | |
卷号 | 218期号:0页码:249-252 |
关键词 | Porous Materials Biomimetic Inverted-pyramid Structures Electrochemical Etching Capillary-driven Surface Texturing |
ISSN号 | 0167-577X |
DOI | 10.1016/j.matlet.2018.01.161 |
英文摘要 | Silicon-based biomimetic surfaces with special wettabilities are difficult to be fabricated without lithographic techniques. In this report, superhydrophobic surfaces of porous silicon (PSi) with adjustable papillary microstructures have been prepared simply by electrochemical etching of n-type silicon, capillary-driven surface texturing (CDST) of PSi films and surface modification. According to the results of FE-SEM and Drop Shape Analyzer, surface morphologies (from 2D pore structures to 3D papillary microstructures) and corresponding wettabilities (Contact angles, CAs: 134.8°-158.9°; Sliding angles, SAs: 180°-1°) of PSi films can be adjusted efficiently by current density (<20 mA cm−2). The sizes and distribution of inverted-pyramid structures (IPSs) at the interfaces and symbiotic macropores in their centers are essential for such an adjustment. Considering the excellent biocompatibility of PSi, Such surfaces will be beneficial to the silicon-based biosensors, microarrays and microfluidics. |
学科主题 | 材料科学与物理化学 |
资助项目 | 纳米润滑研究组 |
语种 | 英语 |
WOS记录号 | WOS:000427452200063 |
资助机构 | the National Natural Science Foundation of China (51661135022 ; 51475447) |
内容类型 | 期刊论文 |
源URL | [http://ir.licp.ac.cn/handle/362003/23698] |
专题 | 兰州化学物理研究所_先进润滑与防护材料研究发展中心 兰州化学物理研究所_固体润滑国家重点实验室 |
通讯作者 | Zhang JY(张俊彦) |
作者单位 | Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Gansu, Peoples R China |
推荐引用方式 GB/T 7714 | Wang FG,Cao ZY,Liang AM,et al. Surface structure and wettability tuning of porous silicon films by capillary-driven surface texturing under different current densities of electrochemical etching[J]. Materials Letters,2018,218(0):249-252. |
APA | Wang FG.,Cao ZY.,Liang AM.,Zhang XK.,Qiang L.,...&Zhang JY.(2018).Surface structure and wettability tuning of porous silicon films by capillary-driven surface texturing under different current densities of electrochemical etching.Materials Letters,218(0),249-252. |
MLA | Wang FG,et al."Surface structure and wettability tuning of porous silicon films by capillary-driven surface texturing under different current densities of electrochemical etching".Materials Letters 218.0(2018):249-252. |
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