Hi, I am working on synthesis of Silymarin Gold Nanoparticles for my project and I am unable to get nanoparticles in dry powder form for characterization tests. Can anyone kindly guide me with suitable methods of drying?
Once you dry the nanoparticles in suspension they are no longer nanoparticles even if you add a cryoprotectant. Under an electronic microscope the partices will look fine but upon redispersion you will see beautiful aggregates.