Cyclodextrins stabilize TOPO-(CdSe)ZnS quantum dots in water

Jun Feng, Yong Hyun Kim, S. B. Zhang, Shi You Ding, Melvin P. Tucker, Garry Rumbles, Michael E. Himmel

Research output: Contribution to journalConference article

Abstract

Chemical action between cyclodextrins (CDs) and TOPO-(CdSe)ZnS quantum dots (QDs) generates a water-soluble solution of CD-QDs. Hydrophobic TOPO molecules on surface of the QDs are compatible to thread through the pockets of CDs and make the hydroxyl group on end of CDs to approach the ZnS surface, and then cause the interaction between ZnS and the hydroxyls. In this paper, Photoluminescence of the γ-CD-QD solution appeared about 15 nm of red movement compared with that of the QDs in hexane; 58% replacement of the crystal coordinate bond of Zn-S with that of Zn-O in the ZnS shell was demonstrated by using first-principles density functional theory and the red shift of the photoluminescence of CD-QDs; and -0.11eV of the energy gain of the exchange model was calculated by using an effective mass (EM) model. CD-QDs will provide water-soluble QDs with conjugational group for biology and molecule-device applications.

Original languageEnglish
Pages (from-to)9-13
Number of pages5
JournalMaterials Research Society Symposium - Proceedings
Volume823
Publication statusPublished - Oct 26 2004
EventBiological and Bioinspired Materials and Devices - San Francisco, CA, United States
Duration: Apr 13 2004Apr 16 2004

Keywords

  • Cyclodextrin-quantum dots
  • Cyclodextrins
  • Quantum dots
  • Water-soluble

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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  • Cite this

    Feng, J., Kim, Y. H., Zhang, S. B., Ding, S. Y., Tucker, M. P., Rumbles, G., & Himmel, M. E. (2004). Cyclodextrins stabilize TOPO-(CdSe)ZnS quantum dots in water. Materials Research Society Symposium - Proceedings, 823, 9-13.