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首页> 外文期刊>Journal of Materials Research >Fabrication and characterization of CdSe/ZnS quantum dots-doped polystyrene microspheres prepared by self-assembly
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Fabrication and characterization of CdSe/ZnS quantum dots-doped polystyrene microspheres prepared by self-assembly

机译：自组装制备CdSe / ZnS量子点掺杂聚苯乙烯微球的制备与表征

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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/cm~2, 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.
机译：使用自组装方法制备了具有高发光度的掺有半导体量子点（QDs）的聚苯乙烯（PS）微球。首先通过巯基羧酸通过配体交换将疏水的CdSe / ZnS QDs羧基化。 PS微球通过静电相互作用分别用聚乙烯亚胺封装，然后与羧基QD吸附形成掺杂QDs的微球。然后，我们使用光学，电气和机械方法对组合物进行表征，得到以下发现：（ⅰ）可以用QD纳米颗粒完全覆盖微球，其覆盖率为1.0 pmole / cm〜2，其中QD均匀分布在纳米颗粒上。表面; （ⅱ）锚定的QD表现出与隔离悬浮液相似的光学性能； （ⅲ）在超声诱导的空化作用下，掺杂QDs的微球体的荧光保持完整，证明了QDs和微球体之间相互作用的稳健性。本研究中开发的自组装方法为制备具有高发光度和稳定性的QDs编码微粒提供了一种简便且可控的策略。

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  • 来源
    《Journal of Materials Research》 |2012年第22期|2829-2836|共8页
  • 作者

    Yu-Hsiang Lee; Ching-Shiow Tseng; Yen-Lin Wei;

  • 作者单位

    Graduate Institute of Biomedical Engineering, National Central University, Taoyuan 32001,Taiwan, Republic of China;

    Graduate Institute of Biomedical Engineering, National Central University, Taoyuan 32001,Taiwan, Republic of China and Department of Mechanical Engineering, National Central University,Taoyuan 32001, Taiwan, Republic of China;

    Graduate Institute of Biomedical Engineering, National Central University, Taoyuan 32001,Taiwan, Republic of China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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