Bibliografie tematiche / Nanoengineered thin films

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Letteratura scientifica selezionata sul tema "Nanoengineered thin films"

Autore: Grafiati
Pubblicato: 12 ottobre 2024

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Articoli di riviste sul tema "Nanoengineered thin films"

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Sangle, Abhijeet L., Oon Jew Lee, Ahmed Kursumovic, Wenrui Zhang, Aiping Chen, Haiyan Wang e Judith L. MacManus-Driscoll. "Very high commutation quality factor and dielectric tunability in nanocomposite SrTiO3 thin films with Tc enhanced to >300 °C". Nanoscale 10, n. 7 (2018): 3460–68. http://dx.doi.org/10.1039/c7nr06991j.

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Abstract (sommario):
We report on nanoengineered SrTiO3–Sm2O3 nanocomposite thin films with the highest reported values of commutation quality factor (CQF or K-factor) of >2800 in SrTiO3 at room temperature.
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Tan, Hui, Obiefune K. Ezekoye, James van der Schalie, Mark W. Horn, Akhlesh Lakhtakia, Jian Xu e William D. Burgos. "Biological Reduction of Nanoengineered Iron(III) Oxide Sculptured Thin Films". Environmental Science & Technology 40, n. 17 (settembre 2006): 5490–95. http://dx.doi.org/10.1021/es060388j.

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Demirel, M. C., E. So, T. M. Ritty, S. H. Naidu e A. Lakhtakia. "Fibroblast cell attachment and growth on nanoengineered sculptured thin films". Journal of Biomedical Materials Research Part B: Applied Biomaterials 81B, n. 1 (2007): 219–23. http://dx.doi.org/10.1002/jbm.b.30656.

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Correa-Duarte, Miguel A, Adam Kosiorek, Witold Kandulski, Michael Giersig e Verónica Salgueiriño-Maceira. "Nanoengineered Polymeric Thin Films by Sintering CNT-Coated Polystyrene Spheres". Small 2, n. 2 (febbraio 2006): 220–24. http://dx.doi.org/10.1002/smll.200500336.

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Fang, Hui, Kenta Matsumoto, Takashi Sumigawa e Takayuki Kitamura. "Anisotropic Elastic Properties of Chiral Sculptured Thin Films at Micro-Scale Evaluated by Resonance Frequency Spectra". Key Engineering Materials 645-646 (maggio 2015): 9–14. http://dx.doi.org/10.4028/www.scientific.net/kem.645-646.9.

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Chiral sculptured thin films (STFs) Glancing-angle deposition (GLAD) thin films are nanoengineered to meet the requirements of a variety of applications such as micro filters, sensors, and waveguides due to their unique frequency characteristics which cannot be achieved by conventional solid materials. For the design, it is necessary to understand the elastic properties of STFs. To facilitate this, we report on our newly developed advanced micro-scale vibration testing process. In the testing, specially designed micro-specimens with surface areas of tens by tens of microns are excited using a piezoelectric (PZT) actuator and the resonance frequencies are detected by a laser device in the vertical or lateral directions successfully. The anisotropy elastic modulus of STFs composed of helical nanosprings are identified on the basis of vibration testing. The thin film shows strong characteristic anisotropy that the solid one hardly can attain. The micro-scale testing technique can be extended to other materials and microstructures.
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Bae, Jung Hyeon, Do Kyung Kim, Tae Hoon Jeong e Hyun Jae Kim. "Crystallization of amorphous Si thin films by the reaction of MoO3/Al nanoengineered thermite". Thin Solid Films 518, n. 22 (settembre 2010): 6205–9. http://dx.doi.org/10.1016/j.tsf.2010.03.175.

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Paul, Dilip K. "Sculptured Thin Films: Nanoengineered Morphology and Optics Sculptured Thin Films: Nanoengineered Morphology and Optics , Akhlesh Lakhtakia and Russell Messier , SPIE Press, Bellingham, WA, 2005. $75.00 (299 pp.). ISBN 0-8194-5606-3". Physics Today 59, n. 4 (aprile 2006): 70–72. http://dx.doi.org/10.1063/1.2207044.

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González, Jesús, Jader González, Fernando Durán, Carlos Salas e Jorge Gómez. "Effect of the Spatially-Varied Electron Mean Free Path on Vortex Matter in a Superconducting Pb Island Grown on Si (111)". Condensed Matter 8, n. 3 (5 settembre 2023): 77. http://dx.doi.org/10.3390/condmat8030077.

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In this work we report theoretical calculations of a superconducting island in a strong vortex confinement regime. The obtained results reveal the evolution of the superconducting condensate with an applied magnetic field, depending on the spatial profile of the electron mean-free path in the sample. The results of this study provide an insight about the emergent superconducting properties under such conditions, using the Ginzburg-Landau numerical simulations where spatial variation of thickness of the island and the corresponding variation of the mean free path, omnipresent in similar structures of Pb grown on Si (111), are taken into account. These results offer a new route to tailor superconducting circuits by nanoengineered mean free path, using for example the controlled ion-bombardment on thin films, benefiting from the here shown impact of the spatially-varying mean free path on the vortex distribution, phase of superconducting order parameter, and the critical fields.
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Ghasemi, Masih, P. K. Choudhury e Arash Dehzangi. "Nanoengineered thin films of copper for the optical monitoring of urine – a comparative study of the helical and columnar nanostructures". Journal of Electromagnetic Waves and Applications 29, n. 17 (4 agosto 2015): 2321–29. http://dx.doi.org/10.1080/09205071.2015.1070107.

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Honciuc, Andrei, Oana-Iuliana Negru e Mirela Honciuc. "Interfacing Langmuir–Blodgett and Pickering Emulsions for the Synthesis of 2D Nanostructured Films: Applications in Copper Ion Adsorption". Nanomaterials 14, n. 9 (6 maggio 2024): 809. http://dx.doi.org/10.3390/nano14090809.

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This research focuses on developing a 2D thin film comprising a monolayer of silica nanoparticles functionalized with polyethyleneimine (PEI), achieved through a novel integration of Langmuir–Blodgett (L-B) and Pickering emulsion techniques. The primary aim was to create a nanostructured film that exhibits dual functionality: iridescence and efficient metal ion adsorption, specifically Cu(II) ions. The methodology combined L-B and Pickering emulsion polymerization to assemble and stabilize a nanoparticle monolayer at an oil/water interface, which was then polymerized under UV radiation to form an asymmetrically structured film. The results demonstrate that the film possesses a high adsorption efficiency for Cu(II) ions, with the enhanced mechanical durability provided by a reinforcing layer of polyvinyl alcohol/glycerol. The advantage of combining L-B and Pickering emulsion technology is the ability to generate 2D films from functional nanoparticle monolayers that are sufficiently sturdy to be deployed in applications. The 2D film’s practical applications in environmental remediation were confirmed through its ability to adsorb and recover Cu(II) ions from aqueous solutions effectively. We thus demonstrate the film’s potential as a versatile tool in water treatment applications owing to its combined photonic and adsorptive properties. This work paves the way for future research on the use of nanoengineered films in environmental and possibly photonic applications focusing on enhancing the film’s structural robustness and exploring its broader applicability to other pollutants and metal ions.
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Più fonti

Tesi sul tema "Nanoengineered thin films"

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Bignoli, Francesco. "Tailoring mechanical behavior of metallic thin films through nanoengineering design strategies : investigation of metallic glass and high entropy alloy films". Electronic Thesis or Diss., Paris 13, 2024. http://www.theses.fr/2024PA131031.

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Les couches minces métalliques sont devenues l'objet de recherches intensives ces dernières années en raison de l'activation des effets de taille mécanique améliorant la résistance et la plasticité.Cependant, l'étude de la connexion entre la structure locale et le comportement mécanique d'un film mince n'est pas pleinement comprise et la recherche de nouvelles nanostructures capables d'améliorer leurs propriétés mécaniques est encore un sujet ouvert.Dans ce projet de doctorat, nous exploitons le potentiel du dépôt laser pulsé (PLD) pour synthétiser de nouveaux verres métalliques (TFMG) et des alliages à haute entropie en films minces (TFHEA) avec une microstructure unique et sur mesure, y compris assemblée en grappes, en nanolaminés, ajustant la chimie locale (notamment avec l'oxygène) pour produire des couches minces présentant une résistance et une plasticité améliorées.Pour le cas des TFMGs, le contrôle de la structure locale permet de retarder et de supprimer les bandes de cisaillement et d'améliorer la résistance, ce qui se traduit par des films ayant la limite d'élasticité > 3 GPa et une déformation homogène de 15 %.Pour le cas des TFHEAs, le PLD peut contrôler la taille des grains obtenant des valeurs élevées de dureté (11 GPa) et une résistance à la fissuration lors de tests de traction sur Kapton® (3,44 %) par rapport aux échantillons fait par pulvérisation (8,3 GPa et 2 %). Dans l'ensemble, dans cette thèse, nous ouvrons la voie à l'utilisation du PLD comme nouvelle technique de synthèse de films métalliques avec une nanostructure et une composition uniques et de grandes propriétés mécaniques pour des applications en revêtements structuraux haute performance
Metallic thin films have become object of intense research in recent years due to the activation of mechanical size effects improving strength and plasticity.However, the study of the connection between the local structure and the mechanical behavior of a thin film is not fully understood yet and the research for new nanostructures capable to further improve and tailor their mechanical properties is still an open subject.In this PhD project, we exploit the potential of Pulsed Laser Deposition (PLD) to synthetize novel thin film metallic glasses (TFMGs) and high entropy alloys (TFHEAs) with unique and tailored composition-microstructure including cluster-assembled, nanolaminate, while tuning local chemistry (especially with O incorporation) to produce thin films with improved strength and plasticity.For the case of TFMGs the control of the local structure allows the delay and suppression of shear bands and improvement of the strength resulting in films with yield strength > 3 GPa and 15% homogeneous deformation.For the case of TFHEAs, PLD can control the grain size obtaining large values of hardness (11 GPa) and have improved crack resistance on tensile tests on Kapton® (3.44%) with respect to sputtered samples (8.3 GPa and 2%).Overall, within this thesis we open the way to the use of PLD as a new technique to synthetize metallic films with unique nanostructure and composition and large mechanical properties for applications as high-performance structural coatings
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Libri sul tema "Nanoengineered thin films"

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R, Messier, a cura di. Sculptured thin films: Nanoengineered morphology and optics. Bellingham, WA: SPIE Press, 2004.

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Lakhtakia, Akhlesh, e Russell Messier. Sculptured Thin Films: Nanoengineered Morphology and Optics. SPIE, 2005. http://dx.doi.org/10.1117/3.585322.

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Sculptured Thin Films: Nanoengineered Morphology and Optics. SPIE, 2005.

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Atti di convegni sul tema "Nanoengineered thin films"

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Eldada, Louay, Matthew Taylor, Baosheng Sang, Scott McWilliams, Robert Oswald e Billy J. Stanbery. "Nanoengineered CIGS thin films for low cost photovoltaics". In NanoScience + Engineering, a cura di Elizabeth A. Dobisz e Louay A. Eldada. SPIE, 2008. http://dx.doi.org/10.1117/12.796877.

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Xiao, Rong, Kuang-Han Chu e Evelyn N. Wang. "Controlled Liquid Dynamics on Three-Dimensional Nanostructured Surfaces". In ASME 2009 Second International Conference on Micro/Nanoscale Heat and Mass Transfer. ASMEDC, 2009. http://dx.doi.org/10.1115/mnhmt2009-18472.

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Nanoengineered surfaces have received significant interest for the manipulation of liquids in microfluidic systems. In this work, we present three-dimensional nanostructures that can control liquid film thickness and the directionality of the liquid spreading. We fabricated silicon nanopillars ranging from 200 nm to 800 nm in diameter and heights of approximately 5 μm. In the presence of notches on the pillars, the liquid separates into multiple layers of liquid films. The thicknesses of the liquid layers subsequently increase as the film propagates, which is determined by the specific position and geometry of the notches. In the presence of asymmetric nanopillars, where the pillars have deflection angles ranging from 0–50 degrees, directional spreading of water droplets can be achieved. The liquid spreads only in the direction of the pillar deflection and becomes pinned on the opposite interface. We performed detailed measurements and developed models to predict the behavior based on pillar geometries. The insights gained from this work offer promise for enhanced control of liquids in microfluidic systems.
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Hodgkinson, Ian. "Optimizing Birefringence In Columnar Coatings - A Problem For The Nanoengineer?" In Optical Interference Coatings. Washington, D.C.: Optica Publishing Group, 1995. http://dx.doi.org/10.1364/oic.1995.fa3.

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When thin film materials such as titania and zirconia are deposited at an oblique angle on to a substrate a tilted columnar (TC) microstructure develops. Electron microscope observations of thin film sections show that the angle between the columns and the substrate normal is determined by, and somewhat less than, the deposition angle. In fact the tangent rule,1 which relates the two angles, was discovered after some of the earliest electron microscope observations on fractured thin film sections.
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Rapporti di organizzazioni sul tema "Nanoengineered thin films"

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Wang, Evelyn N. Nanoengineered Surfaces for High Flux Thin Film Evaporation. Fort Belvoir, VA: Defense Technical Information Center, luglio 2013. http://dx.doi.org/10.21236/ada583176.

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