In Situ Synthesis of Reduced Graphene Oxide and Gold Nanocomposites for Nanoelectronics and Biosensing

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• 作者：Xiaochen Dong (1)
  Wei Huang (1)
  Peng Chen (2)
  
• 关键词：Graphene oxide ; Gold nanoparticles ; Nanoelectronics ; Biosensing
• 刊名：Nanoscale Research Letters
• 出版年：2011
• 出版时间：December 2011
• 年：2011
• 卷：6
• 期：1
• 全文大小：868KB
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• 作者单位：Xiaochen Dong (1)
  Wei Huang (1)
  Peng Chen (2)
  
  1. Key Laboratory for Organic Electronics and Information Displays (KLOEID) and Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications (NUPT), 9 Wenyuan Road, 210046, Nanjing, China
  2. School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, 637457, Singapore
  
• ISSN：1556-276X

文摘

In this study, an in situ chemical synthesis approach has been developed to prepare graphene–Au nanocomposites from chemically reduced graphene oxide (rGO) in aqueous media. UV–Vis absorption, atomic force microscopy, scanning electron microscopy, transmission electron microscopy, and Raman spectroscopy were used to demonstrate the successful attachment of Au nanoparticles to graphene sheets. Configured as field-effect transistors (FETs), the as-synthesized single-layered rGO-Au nanocomposites exhibit higher hole mobility and conductance when compared to the rGO sheets, promising its applications in nanoelectronics. Furthermore, we demonstrate that the rGO-Au FETs are able to label-freely detect DNA hybridization with high sensitivity, indicating its potentials in nanoelectronic biosensing.