Surface structure and wettability tuning of porous silicon films by capillary-driven surface texturing under different current densities of electrochemical etching | |
Department | 先进润滑与防护材料研究发展中心 |
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) | |
The second department | 固体润滑国家重点实验室 |
2018 | |
Source Publication | Materials Letters |
ISSN | 0167-577X |
Volume | 218Issue:0Pages:249-252 |
Abstract | 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. |
Keyword | Porous Materials Biomimetic Inverted-pyramid Structures Electrochemical Etching Capillary-driven Surface Texturing |
Subject Area | 材料科学与物理化学 |
DOI | 10.1016/j.matlet.2018.01.161 |
Funding Organization | the National Natural Science Foundation of China (51661135022 ; 51475447) |
Indexed By | SCI |
If | 2.687 |
Language | 英语 |
Funding Project | 纳米润滑研究组 |
compositor | 第一作者单位 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.licp.cn/handle/362003/23698 |
Collection | 中国科学院材料磨损与防护重点实验室/先进润滑与防护材料研究发展中心 固体润滑国家重点实验室(LSL) |
Corresponding Author | Zhang JY(张俊彦) |
Affiliation | Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Gansu, Peoples R China |
Recommended Citation 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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