title: Surface-charge lithography for direct PDMS micro-patterning.
abstract: Direct patterning of PDMS films is achieved by modulating the wettability of polar dielectric substrates. Periodic array structures of microbumps can be madeup by functionalizing periodically poled lithium niobate crystals. The modulation of surface wettability is obtained through the spatial distribution of the surface electric charges generated by the pyroelectric effect under electrode-less configuration. An appropriate thermal treatment of the substrates assures both the wettability patterning and the fast cross-linking of the PDMS film.
authors.affiliation: Istituto Nazionale di Ottica Applicata del CNR, Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy. simonetta.grilli@inoa.it
authors.forename: Simonetta
authors.initials: S
authors.lastname: Grilli
authors.forename: Veronica
authors.initials: V
authors.lastname: Vespini
authors.forename: Pietro
authors.initials: P
authors.lastname: Ferraro
mesh_terms: D004129:Dimethylpolysiloxanes / Q000737:chemistry*; D008567:Membranes, Artificial; D009556:Niobium / Q000737:chemistry; D010087:Oxides / Q000737:chemistry; D010316:Particle Size; D013499:Surface Properties; D017155:Wettability
chemical_list: D004129:Dimethylpolysiloxanes; D008567:Membranes, Artificial; D010087:Oxides; D009556:Niobium; C091692:lithium niobate; C013830:baysilon