One-pot phase transfer and surface modification of CdSe-ZnS quantum dots using a synthetic functional copolymer

Chiara Finetti, Miriam Colombo, Davide Prosperi, Giulia Alessio, Carlo Morasso, Laura Sola, Marcella Chiari

Research output: Contribution to journalArticle

Abstract

We present a facile, one-pot procedure for the organic-to-water phase transfer and biofunctionalization of semiconductor nanocrystals (quantum dots, or QDs) which employs a synthetic functional copolymer, namely poly(DMA-NAS-MAPS), consisting of three components: a surface interacting monomer, N,N-dimethylacrylamide (DMA), a chemically reactive monomer, N-acryloyloxysuccinimide (NAS), and a silane monomer, [3-(methacryloyloxy)- propyl]-trimethoxysilane (MAPS). The nanocrystals were transferred to water by exploiting the amphiphilic character of the copolymer backbone. Hydrolyzed MAPS units contributed to improve the solubility of QDs in water, whereas NAS exhibited reactivity toward biomolecules. A solution of streptavidin in phosphate buffer exhibited good dispersion ability leading to a clear and transparent colloidal suspension, indicative of good QD dispersion during phase transfer and purification. Unlike most of the published methods, the proposed functionalization approach does not require coupling agents and multistep reactions.

Original languageEnglish
Pages (from-to)240-242
Number of pages3
JournalChemical Communications
Volume50
Issue number2
DOIs
Publication statusPublished - Jan 7 2014

ASJC Scopus subject areas

  • Metals and Alloys
  • Materials Chemistry
  • Surfaces, Coatings and Films
  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Catalysis
  • Chemistry(all)

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