Surface-Energy Engineering of Graphene
Surface-Energy Engineering of Graphene
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DOI：
10.1021/la100231u
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发表时间：
2010-03-16
期刊：
影响因子：
3.9
通讯作者：
Yang, Hyunsoo
中科院分区：
文献类型：
--
作者：
Shin, Young Jun;Wang, Yingying;Yang, Hyunsoo
对SiC外延石墨烯进行了接触角测量。虽然SiC上只有一层外延石墨烯，但接触角从SiC衬底上的69度急剧变化到石墨烯上的92度。从单层、双层、多层石墨烯和高度有序热解石墨（HOPG）的测量中发现，接触角与厚度无关。石墨烯经氧等离子体处理后，用拉曼光谱研究了石墨烯的损伤程度，并报道了其无序程度与润湿性之间的相关性。通过使用低功率氧等离子体处理，石墨烯的润湿性得到了改善，而不会造成额外的损伤，这可以解决石墨烯器件制造中涉及的粘附问题。
Contact angle goniometry is conducted for epitaxial graphene on SiC. Although only a single layer of epitaxial graphene exists on SiC, the contact angle drastically changes from 69 degrees on SiC substrates to 92 degrees on graphene. It is found that there is no thickness dependence of the contact angle from the measurements of single-, bi-, and multilayer graphene and highly ordered pyrolytic graphite (HOPG). After graphene is treated with oxygen plasma, the level of damage is investigated by Raman spectroscopy and the correlation between the level of disorder and wettability is reported. By using a low-power oxygen plasma treatment, the wettability of graphene is improved without additional damage, which can solve the adhesion issues involved in the fabrication of graphene devices.