SEM micrographs of four electron-irradiated regions (I, II, III, and IV) of a PS sample. Taken after 1-h exposure to distinct BSA solutions. The protein concentrations are indicated (black), as well the increase of the electron beam dose from 40 up to 100 mC/cm2 (white).
Imbraguglio et al. Nanoscale Research Letters 2012 7:530 doi:10.1186/1556-276X-7-530