Design, synthesis, and characterization of mesogenic amine-capped nematic gold nanoparticles with surface-enhanced plasmonic resonances

J Am Chem Soc. 2012 Mar 21;134(11):5076-9. doi: 10.1021/ja300492d. Epub 2012 Mar 7.

Abstract

The use of the liquid-crystalline state to control the assembly of large (>5 nm) gold nanoparticles (NPs) is of considerable interest because of the promise of novel metamaterial properties of such systems. Here we report on a new approach for the preparation of large nematic gold NPs using a bifunctional capping agent that enables control over the particle size and serves as a linkage for subsequent functionalization with mesogenic groups. Properties of the NPs were characterized by HRTEM, NMR, DSC, TGA, UV/vis, OPM, and XRD studies. The results confirmed the formation of a stable nematic mesophase above 37.5 °C for NPs in the 6-11 nm size range.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Amines / chemistry*
  • Gold / chemistry*
  • Metal Nanoparticles / chemistry*
  • Molecular Structure
  • Particle Size
  • Surface Plasmon Resonance
  • Surface Properties

Substances

  • Amines
  • Gold