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Littérature scientifique sur le sujet « Artificial opal films »

Auteur : Grafiati
Publié le 4 juin 2021
Mis à jour le 18 février 2022

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Articles de revues sur le sujet "Artificial opal films"

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Samoilovich, Michail I., Svetlana M. Samoilovich, Andrey V. Guryanov et Michail Yu Tsvetkov. « Artificial opal structures for 3D-optoelectronics ». Microelectronic Engineering 69, no 2-4 (septembre 2003) : 237–47. http://dx.doi.org/10.1016/s0167-9317(03)00303-4.

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Lozano, G., L. A. Dorado, D. Schinca, R. A. Depine et H. Míguez. « Optical Analysis of the Fine Crystalline Structure of Artificial Opal Films ». Langmuir 25, no 22 (17 novembre 2009) : 12860–64. http://dx.doi.org/10.1021/la903077r.

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Fudouzi, Hiroshi. « Novel coating method for artificial opal films and its process analysis ». Colloids and Surfaces A : Physicochemical and Engineering Aspects 311, no 1-3 (décembre 2007) : 11–15. http://dx.doi.org/10.1016/j.colsurfa.2007.08.034.

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Ohshima, Shigetoshi. « Hetero-Epitaxial Growth of YBCO and MgB2 Thin Films on Decorated Substrates with Nano-Wires and Nano-Particles ». MRS Proceedings 1454 (2012) : 105–14. http://dx.doi.org/10.1557/opl.2012.1485.

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ABSTRACTSuperconducting NMR pickup coils have to have a low surface resistance (Rs) under a high magnetic field. One way of reducing the Rs of superconducting thin films is adding artificial pins to the films. We examined the hetero-epitaxial growth of MgB2and YBCO thin films on decorated sapphire and MgO substrates while using nano-wires and nano-particles to add pins to the films.We used ZnO nano-wire to add artificial grain boundary pins to MgB2 films. The tilted c-plane sapphire substrate with nano-step edges was used for these substrates. The terrace width with one lattice step edge can be controlled by changing the tilt angle. AFM images showed that the tilted c-plane sapphire substrate had straight nano-step edges. ZnO nono-wires were decorated on the nano-step edges by MOCVD, and then deposited on MgB2 films by sputtering. The Rs of the films was then measured with a sapphire rod resonator. The Rs of MgB2 thin films fabricated on the tilted c-plane sapphire substrate with ZnO nano-wires was lower than that of MgB2thin films on a conventional sapphire substrate under a high magnetic field.We used BaZrO3(BZO) nano-particles to add the artificial pins to YBCO thin films. The BZO particles on the MgO substrates were fabricated by laser deposition. The size and density of these particles were controlled with a pulse number of laser shot. YBCO thin films were formed on decorated MgO substrate by laser deposition. The Rs of YBCO thin films on the decorated MgO substrate was lower than that of the YBCO films formed on a conventional MgO substrate under a high magnetic field.We clarified that artificial pins in MgB2and YBCO thin films are useful for decreasing the Rs under a high magnetic field.
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Jonsson, Fredrik, Clivia M. Sotomayor Torres, Jörg Seekamp, Moritz Schniedergers, Anne Tiedemann, Jianhui Ye et Rudolf Zentel. « Artificially inscribed defects in opal photonic crystals ». Microelectronic Engineering 78-79 (mars 2005) : 429–35. http://dx.doi.org/10.1016/j.mee.2004.12.054.

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Akaiwa, Kazuaki, Norihiro Suzuki, Kentaro Kaneko et Shizuo Fujita. « Fabrication of Corundum-Structured α-(InFe)2O3 Alloy Films on Sapphire Substrates by Inserting α-Fe2O3 Buffer Layer ». MRS Proceedings 1494 (2013) : 221–25. http://dx.doi.org/10.1557/opl.2013.125.

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ABSTRACTWe successfully fabricated corundum-structured α-(InFe)2O3 alloy films on sapphire substrates by inserting α-Fe2O3 buffer layers. The ion compositions in the α-(In1-xFex)2O3 films, x, were artificially tuned for the entire range from 0 to 1 by changing the ion precursor composition in source solution. Magnetic measurements revealed that the α-(In1-xFex)2O3 (x = 0.13) alloy film showed ferromagnetism at 5 K.
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Chumakova, A. V., A. A. Mistonov, A. A. Vorobiev, A. P. Chumakov, N. A. Grigoryeva, N. A. Sapoletova, K. S. Napolskii, A. A. Eliseev et S. V. Grigoriev. « Formation of artificial opals viewed in situ by X-ray grazing insidence diffraction ». Journal of Surface Investigation. X-ray, Synchrotron and Neutron Techniques 7, no 6 (novembre 2013) : 1234–39. http://dx.doi.org/10.1134/s1027451013130041.

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Gaponenko, N. V. « Sol–gel derived films in meso-porous matrices : porous silicon, anodic alumina and artificial opals ». Synthetic Metals 124, no 1 (octobre 2001) : 125–30. http://dx.doi.org/10.1016/s0379-6779(01)00447-7.

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Janda, Petr, Jan Valenta, Jean-Luc Rehspringer, Rodrigue R. Mafouana, Jan Linnros et Robert G. Elliman. « Modified spontaneous emission of silicon nanocrystals embedded in artificial opals ». Journal of Physics D : Applied Physics 40, no 19 (21 septembre 2007) : 5847–53. http://dx.doi.org/10.1088/0022-3727/40/19/008.

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Miralami, Raheleh, Laura Koepsell, Thyagaseely Premaraj, Bongok Kim, Geoffrey M. Thiele, J. Graham Sharp, Kevin L. Garvin et Fereydoon Namavar. « Comparing Biocompatibility of Nanocrystalline Titanium and Titanium-Oxide with Microcrystalline Titanium ». MRS Proceedings 1569 (2013) : 91–96. http://dx.doi.org/10.1557/opl.2013.804.

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ABSTRACTTitanium (Ti) is the material of choice for orthopaedic applications because it is biocompatible and encourages osteoblast ingrowth. It was shown that the biocompatibility of Ti metal is due to the presence of a thin native sub-stoichiometric titanium oxide layer which enhances the adsorption of mediating proteins on the surface [1]. The present studies were devised to evaluate the adhesion, survival, and growth of cells on the surface of new engineered nano-crystal films of titanium and titanium oxides and compare them with orthopaedic-grade titanium with microcrystals. The engineered nano-crystal films with hydrophilic properties are produced by employing an ion beam assisted deposition (IBAD) technique. IBAD combines physical vapor deposition with concurrent ion beam bombardment in a high vacuum environment to produce films (with 3 to 70 nm grain size) with superior properties. These films are “stitched” to the artificial orthopaedic implant materials with characteristics that affect the wettability and mechanical properties of the coatings.To characterize the biocompatibility of these nano-engineered surfaces, we have studied osteoblast function including cell adhesion, growth, and differentiation on different nanostructured samples. Cell responses to surfaces were examined using SAOS-2 osteoblast-like cells. We also studied a correlation between the surface nanostructures and the cell growth by characterizing the SAOS-2 cells with immunofluorescence and measuring the amount alizarin red concentration produced after 7 and 14 days. The number of adherent cells was determined by means of nuclei quantification on the nanocrystalline Ti, TiO2, and microcrystalline Ti and analysis was performed with Image J. Our experimental results indicated that nanocrystalline TiO2 is superior to both nano and microcrystalline Ti in supporting growth, adhesion, and proliferation. Improving the quality of surface oxide, i.e. fabricating stoichiometric oxides as well as nanoengineering the surface topology, is crucial for increasing the biocompatibility of Ti implant materials.
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Thèses sur le sujet "Artificial opal films"

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Gao, Weihong. « The fabrication of structurally coloured textile materials using uniform spherical silica nanoparticles ». Thesis, University of Manchester, 2016. https://www.research.manchester.ac.uk/portal/en/theses/the-fabrication-of-structurally-coloured-textile-materials-using-uniform-spherical-silica-nanoparticles(c2815c09-5353-4667-a1a3-1b31b62f8787).html.

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Natural precious opals consist of silica nanoparticles of uniform diameter organised in a periodic three-dimensional structure. The physical structure of the material produces the perceived colour by a process of light diffraction. The modification of light by the physical structure of the material is also known as structural colour. This is a different process from how most surface colours are produced where light is more usually absorbed by dye and/or pigment molecules. Desirable aesthetic qualities could be achieved if the structural colours produced by natural opals could be replicated in the form of a film or a coating on textile substrates. The work presented investigates how to produce structurally coloured textiles using surface applications of uniform spherical silica nanoparticles (USSNPs). A novel one-step solvent varying (SV) technique has been developed to synthesise USSNPs with particle diameters in a controlled size range. Using suspensions containing USSNPs, structurally coloured artificial opal (AO) films have been fabricated by self-assembly using a process of natural gravity sedimentation. The sedimentation of a particular particle size range of USSNPs (from which a coloured film was produced), onto the surface of fabrics, produced a structurally coloured fabric. By controlling the mean particle diameter a wide range of spectral colours from red to blue was obtained. The light fastness properties of the coloured textiles were investigated. A further surface modification of USSNPs was performed by adding vinyl functional groups to improve the mechanical strength of the structural colour. This work suggested a novel approach to colouring textile materials without using traditional dyes and/or pigments.
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