Advertisement

Chinese Science Bulletin

, Volume 50, Issue 7, pp 621–625 | Cite as

Preparation of CdTe nanocrystal-polymer composite microspheres in aqueous solution by dispersing method

Articles
  • 43 Downloads

Abstract

Highly fluorescent CdTe nanocrystals were synthesized in aqueous solution, and then processible CdTe nanocrystal-polymer composites were fabricated by coating the aqueous nanocrystals with copolymers of styrene and octadecyl-p-vinyl-benzyldimethylammonium chloride (SOV-DAC) directly. A dichloromethane solution of CdTe nanocrystal-polymer composites was dispersed in the aqueous solution o0f poly (vinyl alcohol) (PVA) generating highly fluorescent microspheres. Experimental parameters such as the concentration of nanocrystal-polymer composites, the concentration of PVA, and stirring speed which had important effect on the preparation of the microspheres were investigated in detail with fluorescent microscope characterization.

Keywords

semiconductor nanocrystals CdTe fluorescence dispersing composite microspheres 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Murray, C. B., Kagan, C. R., Bawendi, M. G., Synthesis and characterization of monodisperse nanocrystals and close-packed nanocrystal assemblies, Annu. Rev. Mater. Sci., 2000, 30: 545–610.CrossRefGoogle Scholar
  2. 2.
    Trindade, T., O’Brien, P., Pickett, N. L., Nanocrystalline semiconductors: synthesis, properties, and perspectives, Chem. Mater., 2001, 13(11): 3843–3858.CrossRefGoogle Scholar
  3. 3.
    Sutherland, A. J., Quantum dots as luminescent probes in biological systems, Curr. Opin. Solid State Mater. Sci., 2002, 6(4): 365–370.CrossRefGoogle Scholar
  4. 4.
    Han, M. Y., Gao, X. H., Su, J. Z. et al., Quantum-dot-tagged microbeads for multiplexed optical coding of biomolecules, Nat. Biotechnol., 2001, 19: 631–635.PubMedCrossRefGoogle Scholar
  5. 5.
    Gao, X. H., Nie, S. M., Doping mesoporous materials with multicolor quantum dots, J. Phys. Chem. B, 2003, 107: 11575–11578.CrossRefGoogle Scholar
  6. 6.
    Gaponik, N., Radtchenko, I. L., Sukhorukov, G. B. et al., Toward encoding combinatorial libraries: charge-driven microencapsulation of semiconductor nanocrystals luminescing in the visible and near IR, Adv. Mater., 2002, 14: 879–882.CrossRefGoogle Scholar
  7. 7.
    O’Brien, P., Cummins, S. S., Darcy, D. et al., Quantum dot-labelled polymer beads by suspension polymerisation, Chem. Comm., 2003: 2532–2533.Google Scholar
  8. 8.
    Zhang, H., Wang, L. P., Xiong, H. M. et al., Hydrothermal synthesis to high quality CdTe nanaocrystals, Adv. Mater., 2003, 15: 1712–1715.CrossRefGoogle Scholar
  9. 9.
    Zhang, H., Zhou, Z., Yang, B. et al., The influence of carboxyl grougs on the photoluminescence of mercaptocarboxylic acid-stabilized CdTe nanoparticles, J. Phys. Chem. B, 2003, 107: 8–13.CrossRefGoogle Scholar
  10. 10.
    Zhang, H., Cui, Z. C., Wang, Y. et al., From water-soluble CdTe nanocrystals to fluorescent nanocrystal-polymer transparent composites using polymerizable surfactant, Adv. Mater., 2003, 15: 777–780.CrossRefGoogle Scholar
  11. 11.
    Zhang, H., Chapter 6, Processible CdTe Nanocrystal-Polymer Composite Material (in Chinese), Doctor’s Dissertation, Jilin University, 2004.Google Scholar
  12. 12.
    Yanagishita, T., Tomabechi, Y., Nishio, K. et al., Preparation of monodisperse SiO2 nanoparticles by membrane emulsification using ideally ordered anodic porous alumina, Langmuir, 2004, 20: 554–555.PubMedCrossRefGoogle Scholar
  13. 13.
    Nakashima, T., Shimizu, M., Kukizaki, M. et al., Particle control of emulsion by membrane emulsification and its applications, Adv. Drug. Deli. Rev., 2000, 45: 47–56.CrossRefGoogle Scholar

Copyright information

© Science in China Press 2005

Authors and Affiliations

  1. 1.Key Laboratory for Supramolecular Structure and Materials, Department of ChemistryJilin UniversityChangchunChina

Personalised recommendations