title: Biomolecule-quantum dot systems for bioconjugation applications.
abstract: In the present work, it is reported for the first time the bioconjugation of CdS quantum dots (QDs) directly with bovine serum albumin (BSA) using a one-step procedure via aqueous route at room temperature by methods of colloidal chemistry. Essentially, the bioconjugates were developed based on BSA as capping ligand for the nucleation and stabilization of CdS nanoparticles using cadmium perchlorate and thioacetamide as precursors. UV-visible spectroscopy was used to characterize the kinetics and the relative stability of CdS nanoparticles. The CdS nanocrystals were produced with the calculated average particle size below 4.0 nm, indicating they were in the so-called "quantum-size confinement range". The results have clearly indicated that BSA was effective on nucleating and stabilizing the colloidal CdS quantum dots.
authors.affiliation: Department of Metallurgical and Materials Engineering, Federal University of Minas Gerais, Av. Antônio Carlos, 6627, School of Engineering, 31270-901, Belo Horizonte, MG, Brazil. hmansur@demet.ufmg.br
authors.forename: Herman S
authors.initials: HS
authors.lastname: Mansur
authors.forename: J C
authors.initials: JC
authors.lastname: González
authors.forename: Alexandra A P
authors.initials: AA
authors.lastname: Mansur
mesh_terms: D000818:Animals; D019187:Cadmium Compounds / Q000737:chemistry*; D002417:Cattle; D003102:Colloids / Q000737:chemistry; D008954:Models, Biological; D053758:Nanoparticles / Q000737:chemistry; D045663:Quantum Dots; D012710:Serum Albumin, Bovine / Q000737:chemistry*; D013440:Sulfides / Q000737:chemistry*
chemical_list: D019187:Cadmium Compounds; D003102:Colloids; D013440:Sulfides; C034939:cadmium sulfide; D012710:Serum Albumin, Bovine