Surface modulation of modified polysiloxane films by conformational photo control

摘要

The research in the field of azopolymeric materials presents a great interest for theirapplications in different areas, like photonics and/or biology, due to their peculiar characteristics. Inthis idea we have studied the possibility to create nano-bi-dimensional structures on the surface ofmodified polysiloxane films under the action of ultraviolet light. We worked with polysiloxanes andlinear poly (p-chloromethyl) styrene full modified with azophenols, which were synthesized anddeposited on glass supports. Thickness of the films was in the 2-5 m range. Under the action of acontrolled distribution of monochromatic UV light on the film was induced a surface modulationwhich results in a structure (surface relief grating "RG "in our case). As light source we have usedlaser radiation with wavelength of 193 nm or 355 nm. We have obtained structures with the pitch of250 and 1000 nm as a function of the irradiation interference field pitch.