Synthesis of Edge-Closed Graphene Ribbons with Enhanced Conductivity

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• 作者：Woo Jong Yu ; Sang Hoon Chae ; David Perello ; Si Young Lee ; Gang Hee Han ; Minhee Yun ; Young Hee Lee
• 刊名：ACS Nano
• 出版年：2010
• 出版时间：September 28, 2010
• 年：2010
• 卷：4
• 期：9
• 页码：5480-5486
• 全文大小：479K
• 年卷期：0
• ISSN：1936-086X

文摘

Edge-closed and edge-opened graphene ribbons were synthesized on Pd nanowire templates using plasma-enhanced chemical vapor deposition (PECVD). After metal nanowire etching, the tubular shaped thin graphene layers were collapsed to edge-closed graphene ribbon. In order to make edge-opened graphene ribbons, the graphene layers on the top part of the metal nanowire were selectively etched by O₂ plasma. The protected graphene layers at the bottom of nanowire are transformed to edge-opened graphene ribbon after nanowire etching. Because of defect-free edges, edge-closed graphene ribbon showed reduced D-band intensity compared to edge-opened graphene ribbons, and moreover, the conductivity of edge-closed graphene ribbon was much higher than that of edge-opened graphene ribbon.