Self-assembled ultra-thin films fabricated from diazoresin and phenol-formaldehyde resin via H-bonding interaction

A photosensitive ultra-thin film has been fabricated from diazoresin (DR) and various phenolformaldehyde resins (PR) through a self-assembly technique (SA). The driving force is confirmed to be a hydrogen-bonding (H-bonding) interaction between the diazonium. groups of DR and the phenolic hydroxy groups of PR. Under exposure of UV-Iight or immersion in an alkaline solution, the hydrogen-bonds between layers will be converted to covalent bonds. As a result, the stability of the film towards polar solvents improves dramatically. (C) 2004 Society of Chemical Industry.Polymer ScienceSCI(E)EI0ARTICLE6815-8195