M. Nowicki et al., Atomic force microscopy investigation of nanometer-scale modifications of polymer morphology caused by ultraviolet irradiation, J VAC SCI A, 18(5), 2000, pp. 2477-2481
The surface morphology of polystyrene (PS), poly(ethylene oxide) (PEO), (PS
) and polystyrene/poly(methyl methacrylate) blend (PS/PMMA) before and afte
r ultraviolet (UV) irradiation was studied by means of atomic force microsc
opy. It was shown that the UV-induced changes were more noticeable on PS an
d PS/PMMA blend than on PEO samples. Moreover, the UV irradiation of PS sam
ple doped with poly(methyl methacrylate) caused distinct changes in surface
morphology. The nanometer-scale structures of the rod-like shape bumps of
diameter of 300 nm and the height of 75 nm were created. We also showed tha
t the very small forces of 0.2 nN are high enough to modify the surface of
PS sample. (C) 2000 American Vacuum Society. [S0734-2101(00)05805-X].