Microplasma assisted synthesis of gold nanoparticle/graphene oxide nanocomposites and their potential application in SERS sensing

Daye Sun, Miao Tang, Li Zhang, Brian Falzon, Dilli Babu Padmanaban, Davide Mariotti, P Maguire, Heping Xu, Mei Chen, Dan Sun

Research output: Contribution to journalArticle

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Abstract

This is the first study on the deployment of direct current atmospheric pressure microplasma technique for the single step synthesis of gold nanoparticle/graphene oxide (AuNP/GO) nanocomposites. The nanocomposites were characterized using ultraviolet-visible spectroscopy (UV-vis), x-ray diffraction and x-ray photoelectron spectroscopy and their formation mechanisms have been discussed in detail. Our AuNP/GO nanocomposites are highly biocompatible and have demonstrated surface enhanced Raman scattering (SERS) properties as compared to pure AuNPs and pure GO. Their potential as SERS substrate has been further demonstrated using probe molecules (methylene blue) at different concentrations.

Original languageEnglish
Article number455603
Pages (from-to)1-18
Number of pages18
JournalNanotechnology
Volume30
Issue number45
Early online date17 Jun 2019
DOIs
Publication statusPublished - 27 Aug 2019

Keywords

  • atmospheric pressure microplasma
  • biosensing
  • gold nanoparticles
  • graphene oxide
  • surface enhanced Raman scattering

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