Issue 6, 2019

Vapour sensing properties of graphene-covered gold nanoparticles

Abstract

We investigated the vapour sensing properties of different graphene-gold hybrid nanostructures. We observed the shifts in the optical spectra near the local surface plasmon resonance of the gold nanoparticles by changing the concentration and nature of the analytes (ethanol, 2-propanol, and toluene). The smaller, dome-like gold nanoparticles proved to be more sensitive to these vapours compared to slightly larger, flat nanoparticles. We investigated how the optical response of the gold nanoparticles can be tuned with a corrugated graphene overlayer. We showed that the presence of graphene increased the sensitivity to ethanol and 2-propanol, while it decreased it towards toluene exposure (at concentrations ≥ 30%). The slope changes observed on the optical response curves were discussed in the framework of capillary condensation. These results can have potential impact on the development of new sensors based on graphene–gold hybrids.

Graphical abstract: Vapour sensing properties of graphene-covered gold nanoparticles

  • This article is part of the themed collection: Gas sensing

Supplementary files

Article information

Article type
Paper
Submitted
22 Febr. 2019
Accepted
21 Apr. 2019
First published
17 Maijs 2019
This article is Open Access
Creative Commons BY-NC license

Nanoscale Adv., 2019,1, 2408-2415

Vapour sensing properties of graphene-covered gold nanoparticles

G. Piszter, K. Kertész, G. Molnár, A. Pálinkás, A. Deák and Z. Osváth, Nanoscale Adv., 2019, 1, 2408 DOI: 10.1039/C9NA00110G

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