Immobilization of Quantum Dots in the Photo-Cross-Linked Poly(ethylene glycol)-Based Hydrogel

Kerim M. Gattás-Asfura, Yujun Zheng, Miodrag Micic, Michael J. Snedaker, Xiaojun Ji, Guodong Sui, Jhony Orbulescu, Fotios M Andreopoulos, Si M. Pham, Chongmin Wang, Roger Leblanc

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Abstract

An inorganic/organic composite hybrid nano-system has been successfully synthesized in which nanocrystalline quantum dots (QDs) were effectively immobilized within a photo-cross-linked polyethylene glycol) (PEG) hydrogel. The immobilization of 3.5-6.0 nm CdTe and 2.0-3.5 nm CdSe QDs within the PEG hydrogel network has been shown to be effective through utilization of physical trapping. These QD-immobilized gel systems demonstrated luminescence characteristics unique to semiconductor QD nanocrystals. Controlled particle extraction from the PEG hydrogel matrix may be possible via a photocleavage process. The solubility property of QDs was controlled through surface functionalization. It is envisioned that the unique photophysical properties of this new material can be utilized as a convenient signal transducer for chemo-/bio-sensing. A promising application of the described QD/PEG-NC hybrid system may be in the fields of fluoroimmunoassay and as a monitoring system for drug delivery and wound healing.

Original languageEnglish
Pages (from-to)10464-10469
Number of pages6
JournalJournal of Physical Chemistry B
Volume107
Issue number38
StatePublished - Sep 25 2003

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ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

Gattás-Asfura, K. M., Zheng, Y., Micic, M., Snedaker, M. J., Ji, X., Sui, G., Orbulescu, J., Andreopoulos, F. M., Pham, S. M., Wang, C., & Leblanc, R. (2003). Immobilization of Quantum Dots in the Photo-Cross-Linked Poly(ethylene glycol)-Based Hydrogel. Journal of Physical Chemistry B, 107(38), 10464-10469.