The structure and properties of graphene on gold nanoparticles

Z. Osváth, A. Deák, K. Kertész, Gy. Molnár, G. Vértesy, D. Zámbó, C. Hwang, L. P. Biró
  • Nanoscale, January 2015, Royal Society of Chemistry
  • DOI: 10.1039/c5nr00268k

Properties of graphene suspended on gold nanoparticles

What is it about?

Graphene covered metal nanoparticles constitute a novel type of hybrid material, which provides a unique platform to study plasmonic effects, surface-enhanced Raman scattering (SERS), and metal–graphene interactions at the nanoscale. Such a hybrid material is fabricated by transferring graphene grown by chemical vapor deposition onto closely spaced gold nanoparticles produced on a silica wafer. The morphology and physical properties of nanoparticle-supported graphene are investigated by atomic force microscopy, optical reflectance spectroscopy, scanning tunneling microscopy and spectroscopy (STM/STS), and confocal Raman spectroscopy.

Why is it important?

Hybrid structures made of graphene and metal nanoparticles are a class of nanocomposites which can display novel physical properties by combining the unique properties of graphene and the advantages of metallic nanoparticles. For example, the localized surface plasmon resonance (LSPR) of metallic nanoparticles can be used to enhance the light absorption of graphene and to increase photocurrents in graphene-based photodetectors

Perspectives

Dr. Zoltán Osváth
MTA Centre for Energy Research (EK), Institute of Technical Physics and Materials Science (MFA)

Graphene covered gold nanoparticles can be interesting as advanced SERS substrates for different molecules. Graphene transferred on top of Au nanoparticles becomes corrugated (rippled), thus it can have enhanced gas sensing properties.

Read Publication

http://dx.doi.org/10.1039/c5nr00268k

The following have contributed to this page: Dr. Zoltán Osváth