Vertical graphene nanosheets synthesized by thermal chemical vapor deposition and the field emission properties
Vertical graphene nanosheets synthesized by thermal chemical vapor deposition and the field emission properties
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热化学气相沉积法合成垂直石墨烯纳米片及其场致发射性能
DOI：
10.1088/0022-3727/49/38/385301
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发表时间：
2016-09-28
影响因子：
3.4
通讯作者：
He, Deyan
中科院分区：
文献类型：
--
作者：
Guo, Xin;Qin, Shengchun;He, Deyan
本文探索了用热化学气相沉积法（CVD）制备垂直石墨烯纳米片（VGNs）的方法。通过优化实验条件，利用热化学气相沉积法首次在镀镍不锈钢衬底上生长出了取向良好、形貌均匀的VGN。同时，基于含碳自由基浓度和动能之间的平衡，了解了生长参数对VGN形貌的影响。结构表征表明，所获得的VGN通常由几个石墨烯层组成，并且与通过其他方法（例如等离子体增强（PE）CVD）合成的VGN相比，波纹较少。场发射测试表明，VGN具有相对稳定的场发射特性，场增强因子约为1470，与PECVD法制备的VGN相当。
In this paper, we explored synthesis of vertical graphene nanosheets (VGNs) by thermal chemical vapor deposition (CVD). Through optimizing the experimental condition, growth of well aligned VGNs with uniform morphologies on nickel-coated stainless steel (SS) was realized for the first time by thermal CVD. In the meantime, influence of growth parameters on the VGN morphology was understood based on the balancing between the concentration and kinetic energy of carbon-containing radicals. Structural characterizations demonstrate that the achieved VGNs are normally composed of several graphene layers and less corrugated compared to the ones synthesized by other approaches, e.g. plasma enhanced (PE) CVD. The field emission measurement indicates that the VGNs exhibit relatively stable field emission and a field enhancement factor of about 1470, which is comparable to the values of VGNs prepared by PECVD can be achieved.