| Autor: |
C. Edwin Tracy, J. Roland Pitts, Esra Ozkan Zayim, Ping Liu, John A. Turner, Satyen K. Deb, Se-Hee Lee |
| Rok vydání: |
2003 |
| Předmět: |
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| Zdroj: |
Solid State Ionics. 165:65-72 |
| ISSN: |
0167-2738 |
| DOI: |
10.1016/j.ssi.2003.08.014 |
| Popis: |
In this study a copolymer poly(styrene-co-allyl-alcohol), [–CH2CH(C6H5)–]x[–CH2CH–(CH2OH)–]y has been employed as a novel template in a sol–gel synthesis process to direct the formation of mesoporous tungsten oxide. The copolymer, due to its rigid hydrophobic block of polystyrene, is a more effective surfactant in an alcohol solution than polypropylene oxide-polyethylene oxide based compounds. The films have been prepared by a spin-coating technique from an ethanol solution of tungsten hexachloride. A room temperature, ultraviolet illumination method has been found to be very suitable for removing the polymer template, leading to the formation of a high-quality mesoporous structure. The electrochromic and optical properties of the mesoporous films are described and compared to standard sol–gel tungsten oxide films. Mesoporous materials exhibit superior high-rate ion-insertion performance when used as electrochromic layers. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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