کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1490180 992319 2012 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Inspired superhydrophobic surfaces by a double-metal-assisted chemical etching route
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Inspired superhydrophobic surfaces by a double-metal-assisted chemical etching route
چکیده انگلیسی

Silicon substrates treated by metal-assisted chemical etching have been studied for many years since they could be employed in a variety of electronic and optical devices such as integrated circuits, photovoltaics, sensors and detectors. However, to the best of our knowledge, the chemical etching treatment on the same silicon substrate with the assistance of two or more kinds of metals has not been reported. In this paper, we mainly focus on the etching time and finally obtain a series of superhydrophobic silicon surfaces with novel etching structures through two successive etching processes of Cu-assisted and Ag-assisted chemical etching. It is shown that large-scale homogeneous but locally irregular wire-like structures are obtained, and the superhydrophobic surfaces with low hysteresis are prepared after the modifications with low surface energy materials. It is worth noting that the final silicon substrates not only possess high static contact angle and low hysteresis angle, but also show a black color, indicating that the superhydrophobic silicon substrate has an extremely low reflectance in a certain range of wavelengths. In our future work, we will go a step further to discuss the effect of temperature, the size of Cu nanoparticles and solution concentration on the final topography and superhydrophobicity.

A double-metal-assisted chemical etching method is employed to fabricate superhydrophobic surfaces, showing a good superhydrophobicity with the contact angle of about 170°, and the sliding angle of about 0°. Meanwhile, the potential formation mechanism about it is also presented.Figure optionsDownload as PowerPoint slideHighlights
► A double-metal-assisted chemical etching method is employed to fabricate superhydrophobic surfaces.
► The obtained surfaces show good superhydrophobicity with a high contact angle and low sliding angle.
► The color of the etched substrate dark brown or black and it is so-called black silicon.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Research Bulletin - Volume 47, Issue 7, July 2012, Pages 1687–1692
نویسندگان
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