Formation of functional groups on graphite during oxygen plasma treatment
Formation of functional groups on graphite during oxygen plasma treatment
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DOI：
10.1016/j.apsusc.2006.03.028
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发表时间：
2006-12-15
影响因子：
6.7
通讯作者：
Spaic, Savo
中科院分区：
文献类型：
--
作者：
Cvelbar, Uros;Markoli, Bostjan;Spaic, Savo
通过氧等离子体功能化热解石墨获得改善的样品润湿性。样品暴露于密度为1 × 10 ~（16）m ~（-3）、电子温度约为5.5eV、中性氧原子密度为8 × 10 ~（21）m ~（-3）的高度离解氧等离子体中20 s。通过水滴接触角测量表面润湿性。接触角从最初的112度下降到约1度。通过XPS分析检测官能团。测量光谱显示表面上的氧浓度大幅增加，而高分辨率分析显示额外的氧以C-O极性官能团的形式键合到石墨表面上，从而增加表面能。(c)2006 Elsevier B. V.保留所有权利。
Improved sample wettability was obtained by oxygen plasma functionalization of pyrolytic graphite. The samples were exposed to highly dissociated oxygen plasma with the density of 1 X 10(16) m(-3), the electron temperature of about 5.5 eV and the density of neutral oxygen atoms of 8 X 10(21) m(-3) for 20 s. The surface wettability was measured by a contact angle of water drop. The contact angle dropped from original 112 degrees down to about 1 degrees. The functional groups were detected by XPS analyses. The survey spectrum showed a substantial increase of oxygen concentration on the surface, while high-resolution analyses showed additional oxygen was bonded onto the graphite surface in the form of C-O polar functional group responsible for the increase of the surface energy. (c) 2006 Elsevier B.V. All rights reserved.