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Updated: Sep 27, 2025

Advanced Compositional Analysis of Nanoparticle-polymer Composites Using Direct Fluorescence Imaging
Published on: July 19, 2016
Chitosan nanocomposites with CdSe/ZnS quantum dots and porphyrin
F A Sewid1,2, K I Annas1, A Dubavik1
1ITMO University St. Petersburg 197101 Russia fayzaomar8891@gmail.com a.o.orlova@gmail.com.
Abstract:
Water-soluble nanocomposites based on CdSe/ZnS quantum dots (QDs) and hydrophobic tetraphenylporphyrin (TPP) molecules passivated by chitosan (CS) have been formed. Magnetic circular dichroism (MCD) spectra evidence TPP presence in both monomeric and agglomerated forms in the nanocomposites. The nanocomposites demonstrate more pronounced singlet oxygen generation compared to free TPP in CS at the same concentration due to the intracomplex Förster resonance energy transfer (FRET) with a 45% average efficiency.

