Hydrophobic coating of carbon nanotubes by CH4 glow plasma at low pressure, and their resulting wettability

被引：45

作者：

Cho, Soon Cheon ^{[1
]}

Hong, Yong Cheol ^{[1
]}

Uhm, Han Sup ^{[1
]}

机构：

[1] Ajou Univ, Dept Mol Sci & Technol, Suwon 443749, South Korea

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2007年 / 17卷 / 03期

关键词：

SURFACE FREE-ENERGY;

D O I：

10.1039/b611368k

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

This study demonstrates the hydrophobic coating of carbon nanotubes (CNTs) by methane (CH4) glow discharge plasma at low pressure and investigates the superhydrophobic behavior of the treated CNTs. Carbonaceous species produced from the CH4 glow plasma were identified by optical emission spectroscopy. The treated CNTs floated on water for several months, exhibiting hydrophobic properties. Contact angles (CAs) with test liquids were measured from the capillary rise method based on the Washburn equation, to identify the total surface free energies of CNTs with and without CH4 plasma treatment. The total surface free energy of the CNTs can be determined by making use of the measured CA and the van Oss-Chaudhury-Good equation. It was shown that the surface free energy of the plasma-treated CNTs decreased drastically from 27.04 mN m(-1) to 1.32 x 10(-7) mN m(-1), revealing super-hydrophobic modification of CNTs by the CH4 plasma.

引用

页码：232 / 237

页数：6

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