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Synthesis of Nitrogen-Doped Graphene via Thermal Annealing Graphene with Urea
Xin-jing Li1, Xin-xin Yu2, Jin-yang Liu1, Xiao-dong Fan1, Kun Zhang2, Hong-bing Cai2, Nan Pan1, Xiao-ping Wang*1,2
1.Department of Physics, University of Science and Technology of China, Hefei 230026, China;2.Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Tech-nology of China, Hefei 230026, China
Abstract:
Chemical doping is an effective method to intrinsically modify the chemical and electronic property of graphene. We propose a novel approach to synthesize the nitrogen-doped graphene via thermal annealing graphene with urea, in which the nitrogen source can be controllably released from the urea by varying the annealed temperature and time. The doped N content and the configuration N as well as the thermal stabilities are also evaluated with X-ray photoelectron spectroscopy and Raman spectra. Electrical measurements indi-cate that the conductivity of doped graphene can be well regulated with the N content. The method is expected to produce large scale and controllable N-doped graphene sheets for a variety of potential applications.
Key words:  Graphene, Doping, Conductivity, X-ray photoelectron spectroscopy, Raman spectrum
FundProject:
利用尿素热退火方法制备氮掺杂石墨
李新静1, 于欣欣2, 刘金养1, 范晓东1, 张琨2, 蔡洪冰2, 潘楠1, 王晓平*1,2
1.中国科学技术大学物理系,合肥230026;2.中国科学技术大学合肥微尺度物质科学国家实验室(筹),合肥230026
摘要:
在尿素气氛中,通过热退火实验实现石墨烯的氮掺杂. 结合光电子能谱和拉曼光谱,确定了氮在石墨烯中的掺杂构型,并发现掺杂量可以通过退火温度和时间加以调控. 电性测量表明掺杂石墨烯的电导同氮掺杂量有很好的关联性.
关键词:  石墨烯,掺杂,电导,光电子能谱,拉曼光谱
DOI:10.1088/1674-0068/25/03/325-329
分类号: