title: Study on the fluorescence resonance energy transfer between CdS quantum dots and Eosin Y.
abstract: Water-soluble CdS quantum dots (QDs) were prepared using mercaptoacetic acid (TGA) as the stabilizer in an aqueous system. A fluorescence resonance energy transfer (FRET) system was constructed between water-soluble CdS QDs (donor) and Eosin Y (acceptor). Several factors that impacted the fluorescence spectra of the FRET system, such as pH (3.05-10.10), concentration of Eosin Y (2-80 mg/L) and concentration of CdS QDs (2-80 mg/L), were investigated and refined. Donor-to-acceptor ratios, the energy transfer efficiency (E) and the distance (r) between CdS QDs and Eosin Y were obtained. The results showed that a FRET system could be established between water-soluble CdS QDs and Eosin Y at pH 5.0; donor-to-acceptor ratios demonstrated a 1: 8 proportion of complexes; the energy transfer efficiency (E) and the distance (r) between the QDs and Eosin Y were 20.07% and 4.36 nm,respectively.
authors.affiliation: Department of Analytical Chemistry, China Pharmaceutical University, Nanjing, China.
authors.forename: Zhengyu
authors.initials: Z
authors.lastname: Yan
authors.forename: Zhengwei
authors.initials: Z
authors.lastname: Zhang
authors.forename: Yan
authors.initials: Y
authors.lastname: Yu
authors.forename: Jianqiu
authors.initials: J
authors.lastname: Chen
mesh_terms: D019187:Cadmium Compounds / Q000032:analysis* / Q000138:chemical synthesis; D004801:Eosine Yellowish-(YS) / Q000032:analysis*; D031541:Fluorescence Resonance Energy Transfer; D006863:Hydrogen-Ion Concentration; D045663:Quantum Dots; D013440:Sulfides / Q000032:analysis* / Q000138:chemical synthesis
chemical_list: D019187:Cadmium Compounds; D013440:Sulfides; C034939:cadmium sulfide; D004801:Eosine Yellowish-(YS)
keywords: CdS quantum dots; Eosin Y; FRET