15-20 June 2014
Laurentian University / Université Laurentienne
America/Toronto timezone
Welcome to the 2014 CAP Congress! / Bienvenue au congrès de l'ACP 2014!

Facile nucleation of gold nanoparticles on graphene-based thin films from Au144 molecular precursors

17 Jun 2014, 09:30
15m
C-304 (Laurentian University / Université Laurentienne)

C-304

Laurentian University / Université Laurentienne

Sudbury, Ontario
Oral (Student, In Competition) / Orale (Étudiant(e), inscrit à la compétition) Condensed Matter and Materials Physics / Physique de la matière condensée et matériaux (DCMMP-DPMCM) (T1-8) Surfaces and Thin Films - DCMMP-DSS / Surfaces et couches minces - DPMCM-DSS

Speaker

Andrei Venter

Description

We demonstrate a facile and cost effective method to obtain gold nanoparticles on graphene by dispersing Au144 molecular nanoclusters by spin coating them in thin layers on graphene-based films and subsequent annealing in a controlled atmosphere. The graphene-based thin films used for these experiments are prepared by solvent-assisted exfoliation of graphite in water in the presence of ribonucleic acid as a surfactant and by subsequent vacuum filtration of the resulting graphene-containing suspensions. Not only is this method easily reproducible, but it leads to gold nanoparticles that are not dependent in size on the number of graphene layers beneath them. This is a distinct advantage over other methods. Plasmonic effects have been detected in our gold nanoparticledecorated graphene, indicating that these thin films may be useful in applications such as plasmonic solar cells and optical memory devices.

Primary author

Co-authors

Dr Giovanni Fanchini (The University of Western Ontario) M Shafiq (The University of Western Ontario) Mr Mahdi Hesari (The University of Western Ontario) Dr Mark Workentin (The University of Western Ontario) Reginald Bauld (University of Western Ontario)

Presentation Materials