Effect of surface roughness and chemical composition on the wetting properties of silicon-based substrates

被引：53
作者：
Coffinier, Yannick [1 ,2 ]
Piret, Gaelle [1 ,2 ]
Das, Manash R. [1 ,2 ]
Boukherroub, Rabah [1 ,2 ]
机构：
[1] Univ Lille 1, IRI, CNRS USR 3078, F-59658 Villeneuve Dascq, France
[2] Univ Lille 1, IEMN, UMR CNRS 8520, F-59652 Villeneuve Dascq, France
来源：
COMPTES RENDUS CHIMIE | 2013年 / 16卷 / 01期
关键词：
Crystalline silicon; Porous silicon; Silicon nanowires; Surface roughness; Hydrosilylation; 1-octadecene; Undecylenic acid; Superhydrophobic; POROUS-SILICON; DNA HYBRIDIZATION; SI NANOWIRES; FUNCTIONALIZATION; PASSIVATION; MONOLAYERS; ACID; IMMOBILIZATION; WETTABILITY; REACTIVITY;
D O I：
10.1016/j.crci.2012.08.011
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The article reports on the wetting properties of silicon-based materials as a function of their roughness and chemical composition. The investigated surfaces consist of hydrogen-terminated and chemically modified atomically flat crystalline silicon, porous silicon and silicon nanowires. The hydrogenated surfaces are functionalized with 1-octadecene or undecylenic acid under thermal conditions. The changes occurring upon surface functionalization are characterized using Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS) spectroscopy and water contact angle measurements. By increasing the surface roughness, the static water contact angle increases. The combination of high surface roughness with chemical functionalization with water repellent coating (1-octadecene) enables reaching superhydrophobicity (water contact angle greater than 150 degrees) for silicon nanowires. (C) 2012 Academie des sciences. Published by Elsevier Masson SAS. All rights reserved.
引用
收藏
页码：65 / 72
页数：8
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