Enhancing the photoluminescence of peptide-coated nanocrystals with shell composition and UV irradiation

James M. Tsay, Suren Doose, Fabien Pinaud, Shimon Weiss

Research output: Contribution to journalArticlepeer-review

53 Scopus citations

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.

Original languageEnglish
Pages (from-to)1669-1674
Number of pages6
JournalJournal of Physical Chemistry B
Volume109
Issue number5
DOIs
StatePublished - 10 Feb 2005
Externally publishedYes

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