title: Bio-inspired in situ growth of monolayer silver nanoparticles on graphene oxide paper as multifunctional substrate.
abstract: In this study, we report a facile bio-inspired method for large-scale preparation of highly dispersed Ag nanoparticles (NPs) on the surface of flexible reduced graphene oxide (rGO) paper with using dopamine (DA) both as a reductant and a surface modifier. Through the self-polymerization of dopamine, free-standing GO paper can be simultaneously reduced and modified with following in situ growth of monolayer Ag NPs on such a substrate. The spherical Ag NPs with an average diameter of 80 nm have a narrow size distribution and tunable cover density. Such a flexible rGO/Ag hybrid paper presents enhanced antibacterial activity against E. coli and a high active and sensitive SERS response toward Rhodamine 6G (R6G) molecules. The detection signals can be obtained while the R6G concentration is as low as to 10(-8) M. This work provides a simple strategy for large-scale fabrication of monolayer Ag NPs on flexible rGO paper as a portable antibacterial substrate and a potential SERS substrate for molecular detection applications.
authors.affiliation: Division of Nanomaterials & Chemistry, Hefei National Laboratory for Physical Sciences at Microscale, Department of Chemistry, Collaborative Innovation Center of Suzhou Nano Science and Technology, University of Science and Technology of China, Hefei 230026, P. R. China. shyu@ustc.edu.cn.
authors.forename: Shi-Kuo
authors.initials: SK
authors.lastname: Li
authors.forename: You-Xian
authors.initials: YX
authors.lastname: Yan
authors.forename: Jin-Long
authors.initials: JL
authors.lastname: Wang
authors.forename: Shu-Hong
authors.initials: SH
authors.lastname: Yu