Fluorescent-Magnetic Nanostructures Based on Polymer-Quantum Dots Conjugates

被引：1
作者：
da Silva, Maria I. N. [1 ]
Mansur, Alexandra A. P. [1 ]
Schatkoski, Vanessa [1 ]
Krambrock, Klaus W. H. [2 ]
Gonzalez, Juan [2 ]
Mansur, Herman S. [1 ]
机构：
[1] Univ Fed Minas Gerais, Dept Met & Mat Engn, Sch Engn, BR-31270901 Belo Horizonte, MG, Brazil
[2] Univ Fed Minas Gerais, Dept Phys, BR-31270901 Belo Horizonte, MG, Brazil
来源：
MACROMOLECULAR SYMPOSIA | 2012年 / 319卷 / 01期
关键词：
biological applications of polymers; colloids; conjugated polymers; nanocomposites; nanoparticles; quantum dots; water-soluble polymers;
D O I：
10.1002/masy.201100178
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
In this study it is presented the synthesis and the characterization of Fluorescent-Magnetic Nanostructures based on polymer-quantum dots conjugates. Polyvinyl alcohol (PVA) was used as the capping-ligand for the preparation of CdxMn1-xS semiconductor nanocrystals via aqueous colloidal chemistry. Different substitution ratios of Cd2+ by Mn+2 ions were investigated aiming at the formation of stable nanoparticles with photo-luminescent and semi-magnetic properties. UV-visible spectroscopy (UV-vis), photoluminescence spectroscopy (PL), Electric Paramagnetic Resonance Spectroscopy (EPR), and transmission electron microscopy (TEM) were used to characterize the formation and the relative stability of CdxMn1-xS nanoparticles. The results have showed the influence of the Mn2+ partially replacing Cd2+ in the optical behavior of the quantum dots (QDs) produced. In addition, the CdxMn1-xS QDs have evidenced luminescent and semi-magnetic properties. Thus, the biocompatible water-soluble polymer was effective as ligand for synthesizing and stabilizing QDs conjugates with properties allowing them to be potentially applied as imaging and labeling probes in the biomedical field.
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页码：114 / 120
页数：7
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