Abstract:
A protrusion/recess structure in which fine particles will not drop easily and which will not be deformed easily is provided, and a producing method for the same is provided. In the protrusion/recess structure (porous film), protrusions or recesses (fine corrugations) are formed in a surface. The protrusion/recess structure is formed from plural fine particles and an amphipathic high molecular compound having a catechol group. The high molecular compound at least partially coats a surface of the fine particles, to adhere the fine particles to one another. A diameter of the recesses is larger than a diameter of the fine particles. Cast film is formed from solution containing the fine particles and the high molecular compound having the catechol group. Condensation on the cast film is performed, and organic solvent and water droplets created by the condensation are evaporated to produce the protrusion/recess structure.
Abstract:
Film, which has a fine structure and is adhered to various materials in an easy and strong manner without an adhesive agent, and a composite structure, film laminate, producing method and etching method, are provided. Solution in which a hydrophobic high molecular compound and a catechol group-containing compound are dissolved in solvent is cast, to form cast film. Dew is condensed on an uncovered surface of the cast film. The solvent and water droplets upon the condensation are evaporated from the cast film, to produce porous film. The porous film has a honeycomb structure in which plural pores are formed in one film surface. The pores are in a substantially equal shape and size, and are arranged regularly at a constant pitch. The film surface on a side having the pores of the porous film is a functional surface having an adhesive property.