Takako Yoshino

Electrochromic Properties of V2O5 Thin Films Colloid-Chemically Deposited onto ITO Glasses

The dynamic properties of a V2O5 ECD cell prepared by the sol-get method are mentioned. The V2O5 thin film was electrochemically deposited onto ITO glass from a poly-vanadic acid sol. The response time of the ECD cell was 2–20 seconds, depending upon the cell voltage. The repeating time was more than 8×104 times. It is possible to fabricate large-area ECD cells by this method.

CHARACTERIZATION AND PROPERTIES OF ELECTROCHROMIC COBALT OXIDE THIN FILM PREPARED BY ELECTRODEPOSITION

Abstract Electrochromic, anodically and cathodically deposited films were prepared by electrodeposition from Co(NO3)2 solution onto ITO glass substrate. Anodically deposited films consisted of cobalt oxide and cathodically deposited films consisted of α-Co(OH)2, β-Co(OH)2 and CoO which had been originated from the redox reaction of OH− ions existing in the electrolyte. Furthermore, H2O penetrates into the anodically deposited film during the redox reaction. In the case of the cathodically deposited film, Co(OH)2 is present at the reduction state, whereas at the oxidation state, the film composition changes to a mixture of Co(OH)2 and CoO.

Preparation of ZnO/Au Nanocomposite Thin Films by Electrodeposition.

ZnO/Au nanocomposite thin films were fabricated by electrodepositon from an aqueous solution of Zn(NO3)2 and KAuCl4. The composite film contained small particles of Au, the average diameter of which was in the range of 18 to 25 nm. The composite films were transparent and were red due to surface plasmon absorption of small Au particles deposited without subsequent heat treatment.

Electrochromic IrOx thin films formed in sulfatoiridate (III,IV) complex solution by periodic reverse current electrolysis (PRIROF)

Electrochromic thin films of iridium oxide have been obtained by alternative anodic and cathodic polarization of the electroconducting glass (NESA) in a sulfatoiridate complex solution. On both electrodes a transparent, dark-blue deposition was observed. According to the current waveform, it is suggested that the repeated anodic and cathodic polarization acts as coloring and bleaching processes of the electrochemically growing deposit, the electrochromic oxide film gradually thickening on the NESA. The deposits are very adhesive to the substrate NESA. This method offers a simple and economical process for manufacturing iridium oxide films on NESA glasses compared with the already reported method.

ELECTROCHROMIC PROPERTIES OF COBALT OXIDE THIN FILM ON ITO

The electrochromic, anodically deposited cobalt oxide film and cathodically deposited cobalt hydoxide film were prepared by electrodeposition from Co(NO3)2 solution onto ITO glass substrate. Anodically deposited film consisted of CoO and cathodically deposited film consisted of α -Co (OH)2, β-Co (OH)2, CoO which revealed a clear redox reaction in electrolyte containing OH” ion.

Die farbanodisierung des aluminiums und seiner legierungen —grundsätzliche untersuchungen und anwendungen in Japan☆

Abstract Recent advances in Japanese research on the colour anodising of aluminium and its alloys are reviewed.