Journal
MACROMOLECULAR RESEARCH
Volume 15, Issue 4, Pages 330-336Publisher
POLYMER SOC KOREA
DOI: 10.1007/BF03218795
Keywords
CdSe/ZnS QDs; PEG-PLA diblock copolymer; polymer micelle; encapsulation
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Luminescent CdSe/Z,nS QDs, with emission in the red region of the spectrum, were synthesized and encapsulated in poly(ethylene glycol)-poly(D,L-lactide) diblock copolymer micelles, to prepare water-soluble, bio-compatible QD micelles. PEG-PLA dibtock copolymers were synthesized by ring opening polymerization of D,Lactide, in the presence of methoxy PEG as a macroinitiator. QDs were encapsulated with PEG-PLA polymers using a solid dispersion method in chloroform. The resultant polymer micelles, with encapsulated QDs, were characterized using various analytical techniques, such as UV-Vis measurement, light scattering, fluorescence spectroscopy, transmission electron microscopy (TEM) and atomic forced microscopy (AFM). The polymer micelles, with encapsulated QDs, were spherical and showed diameters in the range of 20-150 nm. The encapsulated QDs were highly luminescent, and have high potential for applications in biomedical imaging and detection.
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