Work

Enhancing the Photoluminescence of Peptide-Coated Nanocrystals with Shell Composition and UV Irradiation

Year: 2005

Type: article

Abstract: The composition and structure of inorganic shells grown over CdSe semiconductor nanocrystal dots and rods were optimized to yield enhanced photoluminescence properties after ligand exchange followed by coating with phytochelatin-related peptides. We show that, in addition to the peptides imparting superior colloidal properties and providing biofunctionality in a single-step reaction, the improved shells and pretreatment with UV irradiation resulted in high quantum yields for the nanocrystals in water. Moreover, peptide coating caused a noticeable red-shift in the absorption and emission spectra for one of the tested shells, suggesting that exciton-molecular orbital (X-MO) coupling might take place in these hybrid inorganic-organic composite materials.

Source: The Journal of Physical Chemistry B

DOI: 10.1021/jp046828f

Authors: James M. Tsay, Sören Doose, Fabien Pinaud, Shimon Weiss

Institution: University of California, Los Angeles

Language: English

Topic: Quantum Dots Synthesis And Properties

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: green

Funders: National Institutes of Health, Defense Advanced Research Projects Agency, National Institute of Biomedical Imaging and Bioengineering, Air Force Office of Scientific Research

Awards: G4744909812, G6573318571, Multimodal Qdot Probes for Bioimaging of Cells and Tumors in Small Animals