Characterization of AuNPs+rGO as a functionalized layer for LSPR sensors

Alessandro Fantoni, Vladan Stojkovic, Ana Carvalho, Ana P. C. Ribeiro, Elisabete C.B.A. Alegria

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Abstract

Graphene-based materials have been extensively explored in recent years as valuable candidates as the key material for novel structures in the field, among many other applications, of sensing devices. This work reports a study about the applicability of rGO as a support for gold nanoparticles (AuNPs) prepared with an economic and eco-friendly method using phytochemicals present in tea extract at room temperature. The overall analysis is supported by simulation results about the LSPR effect in AuNPs-rGO, obtained by Mie theory and FDTD method. The residual phytochemicals are analysed as capping agent of the nanoparticles and their influence on the LSPR properties of the nanoparticles is outlined. The resulting composite is suitable for application as a low-cost sensing layer in biomedical LSPR sensor devices.

Original languageEnglish
Article number100032
JournalMaterials Letters: X
Volume5
DOIs
Publication statusPublished - Mar 2020

Keywords

  • Carbon materials
  • Nanoparticles
  • Optical materials and properties
  • Thin films

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