Silver Nanostructures on Graphene Oxide as the Substrate for Surface-Enhanced Raman Scattering (SERS) |
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| Authors: | Ying Zhang Hao Zhou Qi Shen Zhouwei Shao Lin Xu |
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| Affiliation: | 1. Key Laboratory of Radio Frequency and Micro-Nano Electronics of Jiangsu Province, College of Electronic and optical Engineering &2. College of Microelectronic Key Laboratory for Organic Electronics and Information Displays &3. Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM) Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM) Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing, China;4. Jiangsu Key Laboratory of New Power Batteries, Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, China |
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| Abstract: | Nanosized surface-enhanced Raman scattering (SERS) substrates fabricated by the controlled growth of metal nanostructures on water-dispersed two-dimensional nanomaterials can open a new avenue for SERS analysis of liquid samples in biological fields. In this work, regular and uniform Ag nanostructures were grown on the surface of graphene oxide (GO) through a microwave-assisted hydrothermal method. Polyamidoamine (PAMAM) dendrimers were assembled on the surface of GO to form GO/PAMAM templates for growing Ag nanostructures, which are primarily comprised of Ag dimers and trimers. The prepared Ag/GO nanocomposites are highly dispersed and stable in aqueous solution and may be used as substrates for enhanced Raman detection of rhodamine 6?G (R6G) in aqueous solution. This special substrate provides high-performance SERS and suppresses R6G fluorescence in aqueous solution and is promising as a nanosized material for the enhanced Raman detection of liquid samples in biological diagnostics. |
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| Keywords: | Fouriertransform infrared (FTIR) spectroscopy graphene oxide (GO) polyamidoamine (PAMAM) dendrimers rhodamine 6G (R6G) Surface-enhanced Raman scattering (SERS) transmission electron microscopy (TEM) |
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