Novel "E-paper" device based on nanostructured film of titanium dioxide

Progress in recent years in the field of electro chromic displays based on viologen modified high-surface area nanocrystalline TiO ₂ film electrodes has moved the technology towards comercialisation. A electrochromic device based on a transparent nanostructured TiO ₂ film modified by organic electrochrom phores supported on conducting glass is described. By the chemiabsorption between hydroxyl groups on the surface of nanostructured TiO ₂ film and phosphonic acid attachment groups which are derivatised on the viologen molecules, we obtain a E-paperdevice with excellent properties of electro chromic. The electrolyte is 0.05mol/L LiClO ₄ and 0.05 mol/L ferrocene in 1, 4-butyrolactone and the counter electrode is conducting glass. It is showed that this electrochromic device is of high stable, its respond time is less millisecond, suggests an electrochromic technology with commercial potential in the field of display in the future.