Ligand-free gold atom clusters adsorbed on graphene nano sheets generated by oxidative laser fragmentation in water

- Green synthesis route for colloidal gold clusters in water.
- Oxidative laser fragmentation enables generation of carbon-free metal clusters.
- No organic additives or solvents are present during synthesis.
- Mechanism hypothesis includes oxidative stabilization by delivery of surface charge.
- Cluster adsorption to graphene is demonstrated for relevance.