Journal ArticleDOI
Growth regimes in pulsed laser deposition of aluminum oxide films
F. Di Fonzo,Diego Tonini,A. Li Bassi,Carlo Spartaco Casari,Marco Beghi,Carlo Enrico Bottani,Dario Gastaldi,Pasquale Vena,Roberto Contro +8 more
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TLDR
In this paper, the relationship between the process parameters and the resulting film morphology, structure and properties for PLD performed with an alumina target in a background oxygen atmosphere is investigated, and three distinct growth regimes are found, leading to compact homogeneous films, columnar structures and open microstructures.Abstract:
Alumina is technologically exploited in several forms, ranging from compact hard films as protective coatings to open microstructures of high specific area as supports for catalysts. Currently, various production processes are used to deposit the different forms. PLD has the potential of obtaining not only the different forms, but also a continuous modulation of properties, by tuning of the process parameters. This work investigates the relationship between the process parameters and the resulting film morphology, structure and properties for PLD performed with an alumina target in a background oxygen atmosphere. Three distinct growth regimes are found, leading, respectively, to compact homogeneous films, columnar structures and open microstructures. These structures are quantitatively characterized, and the ranges of the process parameters corresponding to the three regimes are identified. An empirical scaling law is proposed, which can be exploited as a guide for the design of growth processes aimed at obtaining specific film properties.read more
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Journal ArticleDOI
Hierarchical TiO2 Photoanode for Dye-Sensitized Solar Cells
Frédéric Sauvage,F. Di Fonzo,A. Li Bassi,Carlo Spartaco Casari,Valeria Russo,Giorgio Divitini,Caterina Ducati,Carlo Enrico Bottani,Pascal Comte,Michael Graetzel +9 more
TL;DR: A nanostructured TiO(2) assembly combining these two concepts and resembling a forest composed of individual, high aspect-ratio, treelike nanostructure is proposed to use for the photoanode in dye-sensitized solar cells.
Journal ArticleDOI
Pulsed laser deposited alumina thin films
TL;DR: In this paper, the authors investigated the properties of thin amorphous alumina films under vacuum and partial pressure of argon, and showed that the thickness of the thin alumina films with thickness lower than 40nm exhibits a non-negligible void content that induces a decrease of the effective refractive index.
Journal ArticleDOI
Carbon‐Based Photocathode Materials for Solar Hydrogen Production
TL;DR: An in-depth evaluation of the state-of-the-art fabrication of photocathodes through scalable, high-troughput, cost-effective methods is presented and the major aspects on the development of light-trapping nanostructured architectures are addressed.
Journal ArticleDOI
Structural and functional properties of Al:ZnO thin films grown by Pulsed Laser Deposition at room temperature
P. Gondoni,Matteo Ghidelli,F. Di Fonzo,Valeria Russo,P. Bruno,Javier Martí-Rujas,Carlo Enrico Bottani,Carlo Enrico Bottani,A. Li Bassi,A. Li Bassi,Carlo Spartaco Casari,Carlo Spartaco Casari +11 more
TL;DR: In this article, Al-doped ZnO (AZO) thin films were grown by Pulsed Laser Deposition at room temperature in oxygen atmosphere, and the O 2 pressure was varied from 0.01 to 10
Journal ArticleDOI
Yttria-stabilized zirconia thin films by pulsed laser deposition: Microstructural and compositional control
S. Heiroth,Thomas Lippert,Alexander Wokaun,Max Döbeli,Jennifer L. M. Rupp,Barbara Scherrer,Ludwig J. Gauckler +6 more
TL;DR: In this paper, the ns-laser ablation characteristics of tetragonal 3YSZ versus cubic 8YSZ have been investigated to minimize a transfer of particulates in the pulsed laser deposition process.
References
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Pulsed laser deposition of thin films
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TL;DR: In this article, the authors outline the fundamental physics involved and go on to discuss recent experimental findings of pulsed laser deposition, as an alternative to chemical vapor deposition or molecular beam epitaxy.
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Growth of nanostructures by cluster deposition: Experiments and simple models
TL;DR: In this paper, the authors present simple Monte Carlo models useful in analyzing the growth of nanostructures obtained by cluster deposition and examine the atomic mechanisms that explain the diffusion of clusters on a substrate and their mutual interaction, to aggregate keeping their integrity or to coalesce.