title: Easily prepared high-quantum-yield CdS quantum dots in water using hyperbranched polyethylenimine as modifier.
abstract: Some research has reported interaction between polyamidoamine dendrimers or polyethylenimine and quantum dots causing a quantum yield decrease of quantum dots. In this work, however, polyethylenimines of different molecular weight that were used to modify CdS quantum dots gave rise to the enhancement of CdS quantum yield to nearly 100%. Herein, we present the synthesis of a kind of easily prepared high-quantum-yield CdS quantum dot in aqueous solution and the study of the interaction between CdS and polyethylenimine.
authors.affiliation: College of Chemistry and Chemical Engineering and State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, PR China.
authors.forename: Jie
authors.initials: J
authors.lastname: Mao
authors.forename: Jun-Na
authors.initials: JN
authors.lastname: Yao
authors.forename: Li-Na
authors.initials: LN
authors.lastname: Wang
authors.forename: Wei-Sheng
authors.initials: WS
authors.lastname: Liu