AZO-POLYMERS – PHOTOCROMIC BEHAVIOUR STUDIES
Journal Title: BULETINUL INSTITUTULUI POLITEHNIC DIN IASI, CHIMIE SI INGINERIE CHIMICA - Year 2018, Vol 64, Issue 1
Abstract
Understanding the response to illumination at molecular level and characteristics of azo-materials features the key to new bio-science applications and not only. Although a number of mechanisms have been proposed, the entire process of forming structured surfaces is not yet fully elucidated. For a better understanding of the nanostructuration process, the irradiation studies of azo-polymeric films were performed only in condensed phase. Response rate evaluation of azo-polysiloxanic materials to light stimuli, respectively the determination of the cis-trans equilibrium value were carried out at different radiation intensity values to highlight the phenomena occurring both at the surface and in the film depth, within photoinduced patterning processes. Films were irradiated in UV and VIS field. Results indicate that photochemical response of the azo-material is different depending on its chemical structure, irradiation wavelength, irradiation intensity value and the film thickness.
Authors and Affiliations
CRISTINA-MARIA HERGHILIGIU, IRINA CÂRLESCU, DAN SCUTARU, NICOLAE HURDUC
Keywords
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