title: Synthesis of highly stable fluorescent Ag nanocluster @ polymer nanoparticles in aqueous solution.
abstract: Water-soluble, highly stable fluorescent Ag nanoclusters have been synthesized using a novel core/shell solid polymer (PMMA/PMMA-PMAA) nanoparticles as a novel template. The photoluminescence, ultraviolet-visible absorption, X-ray photoelectron (XPS), laser desorption time of flight mass spectroscopies (LDI-ToF-MS) and transmission electron microscopy (TEM) were carried out to characterize the optical properties and morphologies of Ag nanoclusters. The quantum yield of Ag nanoclusters reached 6% and the lifetime of Ag nanoclusters was 0.460 ns. Because of the protective structure of three-dimensional network of the polymer template, the Ag nanoclusters have high stability. And this highly stable fluorescent Ag nanoclusters have successfully been applied for bioimaging.
authors.affiliation: State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun, PR China.
authors.forename: Xumei
authors.initials: X
authors.lastname: Wang
authors.forename: Shuping
authors.initials: S
authors.lastname: Xu
authors.forename: Weiqing
authors.initials: W
authors.lastname: Xu
mesh_terms: D003460:Crystallization / Q000379:methods*; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D019904:Polymethyl Methacrylate / Q000737:chemistry*; D012834:Silver / Q000737:chemistry*; D012996:Solutions; D013050:Spectrometry, Fluorescence / Q000379:methods*; D013499:Surface Properties; D014867:Water / Q000737:chemistry*
chemical_list: D046911:Macromolecular Substances; D012996:Solutions; D014867:Water; D012834:Silver; D019904:Polymethyl Methacrylate