I want to synthesize graphene quantum dots composite with AuNPs (GQDs@Au). So the Graphene quantum dots have been synthesized using the hydrothermal method and using it for the synthesis of GQDS@Au using tetrachloroauric acid and sodium citrate at high temperature (80 degrees celsius). So I want to know, is it ok to use high temperature for the synthesis of this composite, and is there will be any negative impact of high temperature on GQDs?