TRANSPARENT THIN FILM OF TRANSITION METAL OXIDE HAVING LARGE DIAMETER NANO-SPACE, METHOD FOR PRODUCING THE SAME AND DYE-SENSITIZED DEVICE ELECTRODE

摘要

PROBLEM TO BE SOLVED: To provide a method for producing a transparent thin film of a transition metal oxide wherein large pores with a diameter in the range of 30-150 nm that can handle biologically relevant molecules etc. selectively and are present in large volumes and the connecting pores therefor are of a size that biologically relevant molecules can pass through, and the transparent thin film.SOLUTION: The method includes forming a film by mixing a surfactant which consists of block copolymers of a polyoxyethylene unit that plays a hydrophilic role and a polystyrene unit with a degree of polymerization in the range of 300-4,000 that plays a hydrophobic role, a metal salt of titanium, tin or zinc and the precursor of a transition metal oxide having one or more metal alkoxides as an inorganic raw material, and subsequently removing the surfactant.