Enhanced absorption of TiO.sub.2./sub. nanotubes by N-doping and CdS quantum dots sensitization: insight into the structure

0517358 - FZÚ 2020 RIV GB eng J - Journal Article
Bjelajac, A. - Petrovic, R. - Djokic, V. - Matolín, V. - Vondráček, Martin - Dembele, K. - Moldovan, S. - Ersen, O. - Socol, G. - Mihailescu, I. N. - Janackovic, D.
Enhanced absorption of TiO₂ nanotubes by N-doping and CdS quantum dots sensitization: insight into the structure.
RSC Advances. Roč. 8, č. 61 (2018), s. 35073-35082. E-ISSN 2046-2069
R&D Projects: GA MŠMT(CZ) LG15050
Institutional support: RVO:68378271
Keywords : TiO₂ nanotubes * CdS quantum dots * transmission electron microscopy * photoelectron spectroscopy
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 3.049, year: 2018
Method of publishing: Open access

Anodization of titanium film sputtered on fluorine doped tin oxide (FTO) glass was performed to obtain highly ordered 2 mm long and 60 nm wide TiO2 nanotubes. The titania films were annealed in ammonia atmosphere to enable the doping with N. The annealing did not affect the nanotubular morphology and the porosity remained open which is a very important requirement for further deposition of CdS quantum dots. The analysis done by transmission electron microscopy (TEM) has shown that the N-doped nanotubes have a smaller interplanar distance as compared to the undoped ones, whose interplanar distance corresponded to anatase phase. This difference was attributed to the N doping and the Sn migration from the substrate, as demonstrated by energy dispersive spectroscopy (EDS) combined with electron energy loss spectroscopy (EELS).
Permanent Link: http://hdl.handle.net/11104/0302680