Electron-irradiation-induced reinforcement of reduced graphene oxide papers

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• 作者：Enze Jin ; Jianying He ; Kaixuan Sheng ; Zhiliang Zhang ; Gaoquan Shi ; Quanshui Zheng
• 关键词：Reduced graphene oxide paper ; Irradiation ; Enhancement
• 刊名：Acta Materialia
• 出版年：2013
• 出版时间：October, 2013
• 年：2013
• 卷：61
• 期：17
• 页码：6466-6473
• 全文大小：2315 K

文摘

Here we show that the graphene sheets in reduced graphene oxide papers (rGOPs) can be cross-linked by electron-irradiation-induced sp³ carbon atoms, resulting in significant enhancements in both the mechanical and electrical properties compared to unirradiated rGOPs. We find that the residual oxygen-containing functional groups in rGOPs are removed during irradiation. We also observe that the Wigner energy release temperature in rGOPs is 102-188 ¡ãC, which is lower than that (¡«200 ¡ãC) in pure graphite. The mechanisms to form sp³ cross-links and the evolutions of sp³ carbon atoms under irradiation are revealed through molecular dynamics simulations.