Figure 4
From: Immobilization of silver nanoparticles on polyethylene terephthalate
AFM images. AFM images of pristine PET (PET), PET treated by plasma and grafted with BPD (PET/plasma/BPD), PET treated by plasma and grafted with BPD and then with Ag nanoparticles (PET/plasma/BPD/AgNP), and PET treated by plasma and grafted with Ag nanoparticles previously grafted with dithiol (PET/plasma/AgNP*). Ra is surface roughness of samples in nanometers.