Direct Growth of Doping-Density-Controlled Hexagonal Graphene on SiO2 Substrate by Rapid-Heating Plasma CVD

作者：Kato Toshiaki^*; Hatakeyama Rikizo

来源：ACS Nano, 2012, 6(10): 8508-8515.

DOI：10.1021/nn302290z

• graphene sheet
• direct growth
• plasma CVD
• carrier doping

A transfer-free method for growing carrier-density-controlled graphene directly on a SiO2 substrate has been realized for the first time by rapid-heating plasma chemical vapor deposition (RH-PCVD). Using this method, high-quality single-layer graphene sheets with a hexagonal domain can be selectively grown between a Ni film and a SiO2 substrate. Systematic investigations reveal that the relatively thin NI layer, rapid heating, and plasma CVD are critical to the success of this unique method of graphene growth. By applying this technique, an easy and scalable graphene-based field effect transistor (FET) fabrication is also demonstrated. The electrical transport type of the graphene-based FET can be precisely tuned by adjusting the NH3 gas concentration during the RH-PCVD process.

• 出版日期2012-10