Dynamic strain in gold nanoparticle supported graphene induced by focused laser irradiation

András Pálinkás, Péter Kun, Antal A. Koós, Z. Osváth

Research output: Contribution to journalArticle

Abstract

Graphene on noble-metal nanostructures constitutes an attractive nanocomposite with possible applications in sensors or energy conversion. In this work we study the properties of hybrid graphene/gold nanoparticle structures by Raman spectroscopy and scanning probe methods. The nanoparticles (NPs) were prepared by local annealing of gold thin films using a focused laser beam. The method resulted in a patterned surface, with NPs formed at arbitrarily chosen microscale areas. Graphene grown by chemical vapour deposition was transferred onto the prepared, closely spaced gold NPs. While we found that successive higher intensity (6 mW) laser irradiation increased gradually the doping and the defect concentration in SiO2 supported graphene, the same irradiation procedure did not induce such irreversible effects in the graphene supported by gold NPs. Moreover, the laser irradiation induced a dynamic hydrostatic strain in the graphene on Au NPs, which turned out to be completely reversible. These results can have implications in the development of graphene/plasmonic nanoparticle based high temperature sensors operating in dynamic regimes.

Original languageEnglish
Pages (from-to)13417-13425
Number of pages9
JournalNanoscale
Volume10
Issue number28
DOIs
Publication statusPublished - Jul 28 2018

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Laser beam effects
Gold
Graphene
Nanoparticles
Temperature sensors
Precious metals
Energy conversion
Laser beams
Raman spectroscopy
Chemical vapor deposition
Nanostructures
Nanocomposites
Doping (additives)
Irradiation
Annealing
Scanning
Thin films
Defects
Sensors

ASJC Scopus subject areas

  • Materials Science(all)

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Dynamic strain in gold nanoparticle supported graphene induced by focused laser irradiation. / Pálinkás, András; Kun, Péter; Koós, Antal A.; Osváth, Z.

In: Nanoscale, Vol. 10, No. 28, 28.07.2018, p. 13417-13425.

Research output: Contribution to journalArticle

Pálinkás, András ; Kun, Péter ; Koós, Antal A. ; Osváth, Z. / Dynamic strain in gold nanoparticle supported graphene induced by focused laser irradiation. In: Nanoscale. 2018 ; Vol. 10, No. 28. pp. 13417-13425.
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