Optical Spectroscopy Investigation of the Structural and Electrical Evolution of Controllably Oxidized Graphene by a Solution Method

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• 作者：Shengnan Wang ; Rui Wang ; Xinfeng Liu ; Xiaowei Wang ; Dongdong Zhang ; Yanjun Guo ; Xiaohui Qiu
• 刊名：The Journal of Physical Chemistry C
• 出版年：2012
• 出版时间：May 17, 2012
• 年：2012
• 卷：116
• 期：19
• 页码：10702-10707
• 全文大小：339K
• 年卷期：v.116,no.19(May 17, 2012)
• ISSN：1932-7455

文摘

A precisely controlled chemical modification of exfoliated graphene on a substrate was achieved by solution-phase oxidation. The structural and electrical evolution of graphene induced by oxygen-related defects was investigated using micro-Raman and photoluminescence spectroscopy. The sp²-hybrid carbon network in monolayer graphene was found to gradually decrease with increasing degree of oxidation. The size of the graphene quantum dots was finally reduced to about 1 nm, which exhibited an energy band gap of 2 eV. The double-layer graphene showed a symmetry breaking induced by the defects. The process of solution modification may provide a facile method to tailor the electrical properties of graphene on a chip for constructing carbon-based nanoelectronics.