title: Synthesis of fluorescent metal nanoparticles in aqueous solution by photochemical reduction.
abstract: A facile green chemistry approach for the synthesis of sub-5 nm silver and gold nanoparticles is reported. The synthesis was achieved by a photochemical method using tyrosine as the photoreducing agent. The size of the gold and silver nanoparticles was about 3 and 4 nm, respectively. The nanoparticles were characterized using x-ray diffraction, transmission electron microscopy, Fourier transform infrared spectroscopy and photoluminescence spectroscopy. Both silver and gold nanoparticles synthesized by this method exhibited fluorescence properties and their use for cell imaging applications has been demonstrated.
authors.affiliation: Istituto Italiano di Tecnologia, Center for Biomolecular Nanotechnologies@Unile, Via Barsanti, I-73010 Arnesano, LE, Italy.
authors.forename: Prakash
authors.initials: P
authors.lastname: Kshirsagar
authors.forename: Shiv Shankar
authors.initials: SS
authors.lastname: Sangaru
authors.forename: Virgilio
authors.initials: V
authors.lastname: Brunetti
authors.forename: Maria Ada
authors.initials: MA
authors.lastname: Malvindi
authors.forename: Pier Paolo
authors.initials: PP
authors.lastname: Pompa
mesh_terms: D045744:Cell Line, Tumor; D005456:Fluorescent Dyes / Q000737:chemistry*; D006046:Gold / Q000737:chemistry; D055772:Green Chemistry Technology; D006367:HeLa Cells; D006801:Humans; D053768:Metal Nanoparticles / Q000737:chemistry*; D008670:Metals / Q000737:chemistry; D018613:Microscopy, Confocal; D046529:Microscopy, Electron, Transmission; D036103:Nanotechnology / Q000379:methods*; D010100:Oxygen / Q000737:chemistry; D010777:Photochemistry / Q000379:methods*; D012834:Silver / Q000737:chemistry; D012997:Solvents / Q000737:chemistry; D013053:Spectrophotometry; D017550:Spectroscopy, Fourier Transform Infrared; D013778:Tetrazolium Salts / Q000737:chemistry; D014867:Water / Q000737:chemistry; D014961:X-Ray Diffraction
chemical_list: C476329:2-(2-methoxy-4-nitrophenyl)-3-(4-nitrophenyl)-5-(2,4-disulfophenyl)-2H tetrazolium monosodium salt; D005456:Fluorescent Dyes; D008670:Metals; D012997:Solvents; D013778:Tetrazolium Salts; D014867:Water; D012834:Silver; D006046:Gold; D010100:Oxygen