Photosensitive ultra-thin film fabricated on anodized aluminium plate

Diazoresin (DR)-based ultra-thin films, were fabricated on anodized alumini um. plate (AAP) and investigated. The results show, that the adsorption of DR, on AAP surface is characteristic of Langmuir-type and reaches saturatio n rapidly. The thickness of adsorbed monolayer films was determined with an gle-resolve X-ray photoelectron spectrometry (ARXPS), to be 2.5-3.5 nm. It was confirmed that after UV-irradiation the DR combines tightlywith the AAP surface via chemical bonding. As a result, the monolayer films exhibit exc ellent wear resistance and high stability towards solvents. Meanwhile the A AP surface nature becomes hydrophobic from original hydrophilic and accepts ink easily. In addition, the DR-poly(sodium vinyl sulfonate) (PSVS) multil ayer films were also fabricated on AAP surface via self-assembly technique. The DR-PSVS multilayer film, which can dissolve in sodium dodecyl sulfate (SDS) aqueous solution becomes insoluble after UV-irradiation due to the li nkage conversion between the layers from ionic bond to covalent bond.