Enhanced sensing of solvent vapours with graphene-covered gold nanoparticles
Photo by Zugr on Unsplash
What is it about?
We observed the shifts in the optical spectra of gold nanoparticles in the presence of different organic vapours (ethanol, 2-propanol, and toluene). We showed that the sensing properties of gold nanoparticles can be tuned with a corrugated graphene overlayer.
Why is it important?
We apply a graphene overlayer on top of gold nanoparticles. The graphene becomes corrugated by annealing the graphene/gold nanoparticle system at moderate temperatures. The use of such rippled graphene is beneficial in terms of chemical activity, as the crests and troughs of graphene ripples can form active sites for the adsorption of different molecules. We show that the corrugated graphene overlayer can improve both the sensitivity and selectivity of the optical detection.
The following have contributed to this page: Dr. Zoltán Osváth
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