| Title | Novel materials based on organic-tungsten oxide hybrid systems II: Electronic properties of the W-O framework |
| Publication Type | Journal Article |
| Year of Publication | 2004 |
| Authors | Ingham, B., Chong S.V., and Tallon J.L. |
| Journal | Current Applied Physics |
| Volume | 4 |
| Issue | 2-4 |
| Pagination | 202 - 205 |
| Date Published | 2004 |
| ISSN | 15671739 (ISSN) |
| Abstract | In this paper we report experimental and theoretical results concerning the band structure of tungsten trioxide and how this system relates to a new class of layered organic-inorganic hybrid materials based on a tungsten oxide framework. UV-visible spectroscopy was performed on various tungsten trioxide samples. Diffuse reflectance on powder samples indicates a single absorption edge centred at 2.8 eV, while transmission and reflectance of thin films show a strong feature at 4.0 eV. This is supported by ab initio calculations, in which a strong peak is seen at 4.0 eV in the density of states. For the hybrid system, 1, n -diaminoalkane tungsten oxide, a change in the calculated band structure is seen compared with the tungsten oxide system; a peak appears just above 3.0 eV in the density of states with a low intensity 'tail' below this. UV-visible spectra of powder reflectance of hybrid samples indicate a dominant absorption edge centred at 4.0 eV. © 2003 Elsevier B.V. All rights reserved. |
| URL | http://www.scopus.com/inward/record.url?eid=2-s2.0-1542401181&partnerID=40&md5=c1d97ca10bcb99ff8242df46e4717b87 |
| DOI | 10.1016/j.cap.2003.11.009 |
