title: [Synthesis and spectral studies of functionalized L-Cys-CdS nanoparticles as fluorescence probes].
abstract: In this work, nano-CdS was successfully prepared. The nano-CdS was also modified with L-cysteine. Absorption and fluorescence spectra of CdS nanoparticles for different pH values, reaction times and different Cys/Cd2+/S ratios were investigated. Meanwhile a fluorescence enhancing effect was observed between trace zinc ions and the functionalized L-Cys-CdS nanoparticles. The response is linearly proportional to the concentration of zinc ions from 1.0 to 15 micromol x L(-1). The functionalized nanoparticles are hopeful of use as fluorescence probes in detecting trace elements in biological samples.
authors.affiliation: Department of Analytical Chemistry, China Pharmaceutical University, Nanjing 210038, China.
authors.forename: Mei-Ling
authors.initials: ML
authors.lastname: Dai
authors.forename: Zheng-Yu
authors.initials: ZY
authors.lastname: Yan
authors.forename: Dai-Wen
authors.initials: DW
authors.lastname: Pang
authors.forename: Xiu-Fen
authors.initials: XF
authors.lastname: Shao
authors.forename: Ping
authors.initials: P
authors.lastname: Qu
authors.forename: Jing-Tian
authors.initials: JT
authors.lastname: Zhao
mesh_terms: D019187:Cadmium Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D003545:Cysteine / Q000737:chemistry*; D005456:Fluorescent Dyes / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D053758:Nanoparticles / Q000737:chemistry*; D013050:Spectrometry, Fluorescence / Q000379:methods*; D013056:Spectrophotometry, Ultraviolet; D013440:Sulfides / Q000138:chemical synthesis / Q000737:chemistry*
chemical_list: D019187:Cadmium Compounds; D005456:Fluorescent Dyes; D013440:Sulfides; C034939:cadmium sulfide; D003545:Cysteine