Roles of anionic and cationic template components in biomineralization of CdS nanorods using self-assembled DNA-membrane complexes

Hongjun Liang, Thomas E. Angelini, Paul V. Braun, Gerard C.L. Wong

Research output: Contribution to journalArticle

Abstract

Complexes of anionic DNA and cationic liposomes self-assemble into a multilamellar structure where two-dimensional lipid sheets confine a periodic one-dimensional lattice of parallel DNA chains, between which Cd2+ ions can condense, and be subsequently reacted with H2S to form CdS nanorods. In this work, we identify the synergistic roles of the anionic and cationic components within the DNA-membrane template; DNA is highly anionic and condenses the Cd2+ ions, while the cationic membrane modulates the concentration of condensed Cd2+ ions to control the final CdS nanorod dimensions. Due to the strong electrostatic interactions between the DNA sugar-phosphate backbone and the Cd2+ ions, crystallographic control of CdS nanostructures is possible using these simple DNA-membrane templates, which we demonstrate using nanobeam electron diffraction experiments on individual templated CdS nanorods.

Original languageEnglish (US)
Pages (from-to)14157-14165
Number of pages9
JournalJournal of the American Chemical Society
Volume126
Issue number43
DOIs
StatePublished - Nov 3 2004

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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