Excitation polarization sensitivity of plasmon-mediated silver nanotriangle growth on a surface

Langmuir. 2012 Jun 19;28(24):8920-5. doi: 10.1021/la300533h. Epub 2012 Apr 4.

Abstract

In this contribution, we report an effective and relatively simple route to grow triangular flat-top silver nanoparticles (NPs) directly on a solid substrate from smaller NPs through a wet photochemical synthesis. The method consists of fixing small, preformed nanotriangles (NTs) on a substrate and subsequently irradiating them with light in a silver seed solution. Furthermore, the use of linearly polarized light allows for exerting control on the growth direction of the silver nanotriangles on the substrate. Evidence for the role of surface plasmon resonances in governing the growth of the NTs is obtained by employing linear polarized light. Thus, this study demonstrates that light-induced, directional synthesis of nanoparticles on solid substrates is in reach, which is of utmost importance for plasmonic applications.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Metal Nanoparticles / chemistry*
  • Particle Size
  • Silver / chemistry*
  • Surface Plasmon Resonance*
  • Surface Properties

Substances

  • Silver