Tin oxide nano-electrodes were fabricated on fluorine doped tin oxide (FTO) substrates at room temperature. SnO(2) was crystallized from ions in aqueous solutions to cover the substrates uniformly. They were single phase of SnO(2) nano-crystals and about 5-10 nm in size. The surface coatings changed the surface morphology of FTO substrates to increase roughness and surface area. FTO substrates covered with tin oxide had the same transparency as bare IFTO substrates in the range from 200 nm to 850 nm. (C) 2009 Elsevier B.V. All rights reserved.