| abstract |
PCT No. PCT/US95/11512 Sec. 371 Date Jul. 18, 1996 Sec. 102(e) Date Jul. 18, 1996 PCT Filed Aug. 14, 1995 PCT Pub. No. WO97/06896 PCT Pub. Date Feb. 27, 1997The invention relates to a porous metal-oxide film formed on a glass substrate by the sol-gel process. The film is prepared by a method comprising the steps of: (a) preparing a coating solution by mixing a metal alkoxide(s) and/or a metal acetylacetonate(s), a first solvent, water, an acid and an organic polymer; (b) applying the coating solution to the glass substrate; (c) drying a gel film formed thereon at a first temperature not higher than 100 DEG C.; (d) contacting the gel film with a second solvent which is one of an acid solution and a mixed solution of alcohol and water; and (e) heating the gel film at a second temperature so as to transform the gel film into the porous metal-oxide film. The porous metal-oxide film's surface is minutely rough and has a fine features pattern of three-dimensional micro-porous structure. |