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Optical properties of in situ doped and undoped titania nanocatalysts and doped titania sol-gel nanofilms
Vise andre og tillknytning
2006 (engelsk)Inngår i: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 252, nr 15, s. 5365-5367Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

In this paper we present spectroscopic properties of doped and undoped titanium dioxide (TiO2) as nanofilms prepared by the sol-gel process with rhodamine 6G doping and studied by photoacoustic absorption, excitation and emission spectroscopy. The absorption spectra of TiO2 thin films doped with rhodamine 6G at very low concentration during their preparation show two absorption bands, one at 2.3 eV attributed to molecular dimmer formation, which is responsible for the fluorescence quenching of the sample and the other at 3.0 eV attributed to TiO2 absorption, which subsequently yields a strong en-fission band at 600 nm. The electronic band structure and optical properties of the rutile phase of TiO2 are calculated employing a fully relativistic, full-potential, linearized, augmented plane-wave (FPLAPW) method within the local density approximation (LDA). Comparison of this calculation with experimental data for TiO2 films prepared for undoped sol-gels and by sputtering is performed.

sted, utgiver, år, opplag, sider
2006. Vol. 252, nr 15, s. 5365-5367
Emneord [en]
polymer, TiO2 nanofilms, electronic band structure, rhodamine 6G doping, films, tio2
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-15786DOI: 10.1016/j.apsusc.2005.12.041ISI: 000238623300030Scopus ID: 2-s2.0-33744543479OAI: oai:DiVA.org:kth-15786DiVA, id: diva2:333828
Merknad
QC 20100525 QC 20111004. Conference: 8th International Conference on Atomically Controlled Surfaces, Interfaces, and Nanostructures/13th International Congress on Thin Films. Stockholm, SWEDEN. JUN 20-23, 2005 Tilgjengelig fra: 2010-08-05 Laget: 2010-08-05 Sist oppdatert: 2017-12-12bibliografisk kontrollert

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