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. 2014 Jun 16;9(1):305. doi: 10.1186/1556-276X-9-305

Figure 4.

Figure 4

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.