Hydrophobic diamond films

被引：20

作者：

Ostrovskaya, L. Yu. ^{[1
]}

Ral'chenko, V. G. ^{[2
]}

Vlasov, I. I. ^{[2
]}

Khomich, A. A. ^{[2
]}

Bol'shakov, A. P. ^{[2
]}

机构：

[1] Fed Agcy Tech Regulat & Metrol, Res Ctr Surface & Vacuum Properties, Moscow 119421, Russia

[2] Russian Acad Sci, Prokhorov Inst Gen Phys, Moscow 119991, Russia

来源：

PROTECTION OF METALS AND PHYSICAL CHEMISTRY OF SURFACES | 2013年 / 49卷 / 03期

关键词：

ULTRANANOCRYSTALLINE DIAMOND; WETTABILITY; SURFACE; CVD; SPECTROSCOPY; FABRICATION; PRINCIPLES; NANOWIRES; COATINGS; DESIGN;

D O I：

10.1134/S2070205113030118

中图分类号：

TF [冶金工业];

学科分类号：

080601 [冶金物理化学];

摘要：

The peculiarities of wettability of diamond that was obtained in a nanostructured form as ultrananocrystalline diamond (UNCD) films by deposition from a gas phase are considered. Surface hydrogenation leads to hydrophobicity: advancing contact angle theta for UNCD films reaches 106 +/- 1A degrees (for diamond single crystals theta = 93A degrees). Even higher values of theta equal to 124 +/- 3A degrees were detected for nanoporous samples of UNCD, in which a graphite-like component was removed by etching. High hydrophobicity is achieved owing to the specific surface morphology of the nanostructured diamond (anisotropic, with high content of nanopores) and chemical modification, which on the whole provides for very low values of free surface energy of the films. It was shown that laser-drilled microholes in polycrystalline diamond also can enhance the hydrophobicity. The wetting behavior of the nanostructured surfaces agrees well with the Cassie-Baxter equation for heterophase porous surfaces. The oxidation and hydrogenation of UNCD films allows controlling of theta in considerably wider ranges compared to single crystal diamond.

引用

页码：325 / 331

页数：7

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