Using Good's Buffers to Control the Anisotropic Structure and Optical Properties of Spiky Gold Nanoparticles for Refractive Index Sensing

Roger M. Pallares, Terrence Stilson, Priscilla Choo, Jingtian Hu, Teri W. Odom*

*Corresponding author for this work

Research output: Contribution to journalArticle

7 Scopus citations

Abstract

Spiky gold nanoparticles show structure-tunable optical properties. Most synthetic procedures, however, cannot independently manipulate the overall particle shape, core size, and spike features. Furthermore, conventional protocols rely on cytotoxic and/or strongly bound surfactants that limit applications. This paper reports a set of parameters to manipulate the anisotropic features of spiky gold nanoparticles grown by using different biocompatible Good's buffers through a seed-mediated synthesis. Spike dimensions were preserved even when large seeds (up to 100 nm) were used. Finally, we obtained particles with high sensitivity to changes in the refractive index of the surroundings by tuning the spike length and width.

Original languageEnglish (US)
Pages (from-to)5266-5271
Number of pages6
JournalACS Applied Nano Materials
Volume2
Issue number8
DOIs
StatePublished - Aug 23 2019

Keywords

  • Good's buffers
  • anisotropic gold nanoparticles
  • gold nanostars
  • nanoparticle synthesis
  • refractive index sensitivity
  • spiky gold nanoparticles

ASJC Scopus subject areas

  • Materials Science(all)

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