生物结合
乙烯醇
材料科学
纳米颗粒
聚合物
纳米晶
水溶液
羧酸
部分
量子点
高分子化学
化学工程
化学
有机化学
纳米技术
工程类
作者
Herman S. Mansur,Alexandra A.P. Mansur,J. C. González
出处
期刊:Polymer
[Elsevier]
日期:2011-01-12
卷期号:52 (4): 1045-1054
被引量:81
标识
DOI:10.1016/j.polymer.2011.01.004
摘要
In the present research it is reported the synthesis and characterization of CdS nanoparticles (NPs) prepared using carboxylic-functionalized poly (vinyl alcohol) (PVA) as the ligand via aqueous route at room temperature and ambient pressure. Different molar concentrations of carboxylic-PVA and PVA were investigated aiming at producing stable colloidal systems. Carboxylic-PVA was conjugated with BSA (bovine serum albumin) and used as capping ligand in the preparation of CdS nanocrystals. UV–visible spectroscopy, photoluminescence spectroscopy, and transmission electron microscopy were used to characterize the kinetics and the relative stability of polymer-capped CdS nanocrystals. The results have clearly indicated that the carboxylic-functionalized PVA was much more effective on nucleating and stabilizing colloidal CdS nanoparticles in aqueous suspensions compared to PVA. In addition, the CdS nanocrystals were obtained in the so-called "quantum-size confinement regime", with the calculated average size below 4.0 nm and fluorescent activity. Thus, a novel simple route was successfully developed for synthesizing nanohybrids based on quantum dots and water-soluble chemically functionalized polymers with incorporated carboxylic moiety with the possibility of direct bioconjugation.
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