title: Ultrafast self-assembly of silver nanostructures on carbon-coated copper grids for surface-enhanced Raman scattering detection of trace melamine.
abstract: Structurally well-defined assemblies of silver nanoparticles, including the dendritic nano-flowers (NFs), planar nano-spheres (NSs) and nano-dendrites (NDs) were obtained by a surfactant-free and ultrafast (≈15min) self-assembly process on as-purchased carbon-coated copper TEM grids. The silver nano-assemblies, especially the NFs modified TEM grids, when serving as surface-enhanced Raman spectroscopy (SERS) substrates for detecting melamine molecules, demonstrated a long-lived limit of detection (LOD) of as low as 10-11M, suggesting the potential of these silver-assemblies modified carbon-coated copper grids as novel potable and cost-effective SERS substrates for trace detection toward various food contaminants like melamine.
authors.affiliation: Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan; Laboratory of Advanced Materials and Department of Materials Science, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Fudan University, 2205 Songhu Road, Shanghai 200438, People's Republic of China.
authors.forename: Qi
authors.initials: Q
authors.lastname: Cao
authors.affiliation: State Key Laboratory of ASIC and System, School of Microelectronics, Fudan University, 220 Handan Road, Shanghai 200433, People's Republic of China; Laboratory of Advanced Materials and Department of Materials Science, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Fudan University, 2205 Songhu Road, Shanghai 200438, People's Republic of China.
authors.forename: Kaiping
authors.initials: K
authors.lastname: Yuan
authors.affiliation: Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
authors.forename: Jun
authors.initials: J
authors.lastname: Yu
authors.affiliation: Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
authors.forename: Jean-Jacques
authors.initials: JJ
authors.lastname: Delaunay
authors.affiliation: Laboratory of Advanced Materials and Department of Materials Science, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Fudan University, 2205 Songhu Road, Shanghai 200438, People's Republic of China. Electronic address: rcche@fudan.edu.cn.
authors.forename: Renchao
authors.initials: R
authors.lastname: Che
mesh_terms: D000818:Animals; D002244:Carbon / Q000737:chemistry*; D003300:Copper / Q000737:chemistry*; D005506:Food Contamination / Q000032:analysis*; D057230:Limit of Detection; D053768:Metal Nanoparticles / Q000737:chemistry / Q000648:ultrastructure; D008892:Milk / Q000737:chemistry; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D012834:Silver / Q000737:chemistry*; D013059:Spectrum Analysis, Raman / Q000379:methods*; D014227:Triazines / Q000032:analysis*
chemical_list: D014227:Triazines; D012834:Silver; D002244:Carbon; D003300:Copper; C011907:melamine
keywords: Food contamination; Melamine; Noble metals; SERS detection; Self-assembly