Optical properties of self-organized gold nanorod-polymer hybrid films

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

  • Ulrich Tritschler - , University of Konstanz (Author)
  • Igor Zlotnikov - , Multi-scale Analysis (Junior Research Group), Max Planck Institute of Colloids and Interfaces (Author)
  • Philipp Keckeis - , University of Konstanz (Author)
  • Helmut Schlaad - , Max Planck Institute of Colloids and Interfaces, University of Potsdam (Author)
  • Helmut Cölfen - , University of Konstanz (Author)

Abstract

High fractions of gold nanorods were locally aligned by means of a polymeric liquid crystalline phase. The gold nanorods constituting >80 wt % of the thin organic-inorganic composite films form a network with side-by-side and end-to-end combinations. Organization into these network structures was induced by shearing gold nanorod-LC polymer dispersions via spin-coating. The LC polymer is a polyoxazoline functionalized with pendent cholesteryl and carboxyl side groups enabling the polymer to bind to the CTAB stabilizer layer of the gold nanorods via electrostatic interactions, thus forming the glue between organic and inorganic components, and to form a chiral nematic lyotropic phase. The self-assembled locally oriented gold nanorod structuring enables control over collective optical properties due to plasmon resonance coupling, reminiscent of enhanced optical properties of natural biomaterials.

Details

Original languageEnglish
Pages (from-to)13781-13790
Number of pages10
JournalLangmuir
Volume30
Issue number46
Publication statusPublished - 25 Nov 2014
Peer-reviewedYes

External IDs

PubMed 25350776