Structural characterization of nanoparticles-assembled titanium dioxide films produced by ultrafast laser ablation and deposition in background oxygen

► Ultrafast laser ablation of titanium dioxide. ► Elaboration of titanium dioxide nanostructures by femtosecond pulsed laser deposition. ► Structural and morphological variation of TiO2 nanoparticles-assembled films with oxygen pressure in femtosecond pulsed laser deposition. ► Changes of nanopartic...

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Bibliographic Details
Published in:Applied surface science 2013-04, Vol.270, p.307-311
Main Authors: Amoruso, S., Tuzi, S., Pallotti, D.K., Aruta, C., Bruzzese, R., Chiarella, F., Fittipaldi, R., Lettieri, S., Maddalena, P., Sambri, A., Vecchione, A., Wang, X.
Format: Article
Language:English
Subjects:
Ablation
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Condensed matter: structure, mechanical and thermal properties
Cross-disciplinary physics: materials science
rheology
Deposition
Exact sciences and technology
Femtosecond
Low pressure
Nanoparticles
Nanoparticles-assembled films
Nanostructure
Oxides
Physics
Titanium dioxide
Ultrafast lasers
Ultrafast pulsed laser ablation and deposition of oxides
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Summary:► Ultrafast laser ablation of titanium dioxide. ► Elaboration of titanium dioxide nanostructures by femtosecond pulsed laser deposition. ► Structural and morphological variation of TiO2 nanoparticles-assembled films with oxygen pressure in femtosecond pulsed laser deposition. ► Changes of nanoparticles-assembled titanium dioxide films by annealing treatments. Ultrafast laser ablation of titanium dioxide and deposition of nanoparticles-assembled films in oxygen ambient gas at pressures going from high-vacuum up to several mbar is investigated. We identify various regimes of the plumes propagation into the background gas as well as of the material deposition rate. These reflect on the structural characteristics of the nanoparticles-assembled films: the film morphology changes from a structure with glue-like nanoparticulates, at low pressure, to a highly porous assembly of individual nanoparticles, at larger pressure. Our findings indicate that background gas pressure provides an interesting key for additional control on the structural characteristics of oxide nanostructures produced by femtosecond laser deposition.
ISSN:0169-4332
1873-5584
DOI:10.1016/j.apsusc.2013.01.021