Fabrication and characterization of CdSe/ZnS quantum dots-doped polystyrene microspheres prepared by self-assembly

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题名:	Fabrication and characterization of CdSe/ZnS quantum dots-doped polystyrene microspheres prepared by self-assembly
作者:	李宇翔;Lee, Yu-Hsiang;Tseng, Ching-Shiow;Wei, Yen-Lin
贡献者:	生醫理工學院生醫科學與工程學系
关键词:	Applied and Technical Physics;Biomaterials;Cadmium selenides;Inorganic Chemistry;Intermetallics;Luminescence;Materials Engineering;Materials research;Materials Science;Microspheres;Nanoparticles;Nanotechnology;Optical properties;Polystyrene resins;Quantum dots;Scanning electron microscopy;Self assembly;Semiconductors;Ultrasonic imaging
日期:	2012-11-28
上传时间:	2026-04-23 11:16:02 (UTC+8)
出版者:	Cambridge University Press;New York, USA: Cambridge University Press
摘要:	摘要： Semiconductor quantum dots (QDs)-doped polystyrene (PS) microspheres with high luminescence were prepared using a self-assembly approach. Hydrophobic CdSe/ZnS QDs were first carboxylized by ligand exchange using mercaptocarboxylic acid. PS microspheres were separately encapsulated with polyethyleneimine via electrostatic interactions and then adsorbed with the carboxyl QDs to form QDs-doped microspheres. We then characterized the combinations using optical, electrical, and mechanical approaches and obtained the following findings: (i) microspheres can be fully coated by QD nanoparticles with a coverage rate of 1.0 pmole/cm2, in which QDs were evenly distributed on the surfaces; (ii) the anchored QDs exhibited similar optical property as they performed in isolated suspension; and (iii) the fluorescence of QDs-doped microspheres remained intact after stressed by ultrasound-induced cavitation, demonstrating the robustness of interactions between QDs and microspheres. The self-assembly approach developed in this study offered a facile and controllable strategy for preparation of QDs-encoded microparticles with high luminescence and stability. 其他題名： Journal of Materials Research 其他題名： J. Mater. Res 出版者： New York, USA: Cambridge University Press 出版日期： 2012-11-22 出處： Journal of materials research, 2012-11, Vol.27 (22), p.2829-2836 資源來源： ABI/INFORM Collection 版權： Copyright © Materials Research Society 2012 版權： The Materials Research Society 2012 識別號： ISSN: 0884-2914 識別號： EISSN: 2044-5326 識別號： DOI: 10.1557/jmr.2012.332 識別號： CODEN: JMREEE
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