Article
Materials Science, Multidisciplinary
N. Coton, J. P. Andres, E. Molina, M. Jaafar, R. Ranchal
Summary: In this study, the formation of stripe domains in electrodeposited Ni90Fe10 films was investigated. The characteristic fingerprint of stripe domains was observed when the electrolyte was not magnetically stirred during electrodeposition. Stripe domains were visible only by Magnetic Force Microscopy when the sample thickness exceeded the theoretical critical thickness. The induced in-plane magnetoelastic magnetic anisotropy was found to reduce the perpendicular magnetic anisotropy in samples grown in outward bent flexible substrates.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Article
Materials Science, Ceramics
Khan Alam, Mohammad B. Haider, Mohammad F. Al-Kuhaili, Khalil A. Ziq, Bakhtiar Ul Haq
Summary: Chromium nitride thin films were prepared by reactive radio frequency magnetron sputtering, and their properties were studied in relation to the nitrogen to argon flow rate ratio and film composition. The results show that the film composition, band gap, and electronic phase transition are influenced by the gas flow ratio and film composition.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Hichem Benzouid, Said Boudebane, Hana Ferkous, Fouaz Lekoui, Nafarizal Bin Nayan, Amel Delimi, Maha Awjan Alreshidi, Muhammad Arshad, Krishna Kumar Yadav, Barbara Ernst, Noureddine Elboughdiri, Yacine Benguerba
Summary: This study reports the synthesis and characterization of Ti/TiN/TiAlN thin films on 316L stainless steel and silicon wafer substrates using reactive RF/DC magnetron sputtering technique. Experimental and theoretical analyses were performed to investigate the films' microstructure, morphology, thickness, roughness, and wettability. The results demonstrated the effect of different parameters on the properties of the films. The combination of practical and theoretical analyses provided important insights into material properties and design.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Stephan Wulfinghoff, Christian Dorn
Summary: This paper presents a potential-based kinematical description of continuously distributed stripe-shaped domain walls, and derives a mesoscopic potential through an averaging procedure. The resulting mesoscopic theory is formulated in terms of a few fields with physically meaningful microscopic interpretation. A constrained energy minimization principle is introduced based on a phenomenological closure-domain extension. A monolithic finite-element based numerical solution algorithm is proposed, with quadratic convergence achieved for the nonlinear solution procedure through consistent linearization. A first simple examination of the theory is undertaken by simulating a thin film with non-constant effective anisotropy, and the results are consistent with analytical predictions.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
A. Collado-Hernandez, M. Garcia-Mendez, M. I. Mendivil-Palma, C. Gomez-Rodriguez, D. Fernandez-Gonzalez, L. V. Garcia-Quinonez
Summary: One drawback of untreated Sb2S3 thin films is the lack of crystallinity, which can be improved by laser irradiation. In this study, RF-sputtered Sb2S3 thin films were treated with a continuous CO2 laser. The laser treatment resulted in crystallization and a change in sample morphology from cracked to more dense/homogeneous. The structural and morphological changes induced by laser irradiation also improved the optical and electrical properties, including an increase in optical and photoconductivity properties.
Article
Materials Science, Multidisciplinary
S. Tipawan Khlayboonme
Summary: Thin films of V2O5 are promising materials for chromogenic devices and contactless optical thermal sensors. The formation of different phases in these films was investigated, and it was found that the performance of the devices strongly depends on the phase incorporated in the film structure. Understanding the transition between beta phases in V2O5 films can enable better phase control and improve film application towards various sensing devices.
RESULTS IN PHYSICS
(2022)
Article
Chemistry, Physical
Kavita Sahu, Aditi Bisht, Alapan Dutta, Tapobrata Som, Satyabrata Mohapatra
Summary: Plasmonic nanocomposite thin films of Au-Cu2O-CuO were fabricated by RF magnetron co-sputtering and thoroughly analyzed by various techniques. The nanocomposite thin film showed excellent photocatalytic performance for organic pollutants degradation and significant catalytic activity for 4-NP transformation. The presence of Au nanoparticles in the Cu2O-CuO thin film improved charge separation and transport, enhancing the catalytic and photocatalytic features of the nanocomposite.
SURFACES AND INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Samiya Mahjabin, Md Mahfuzul Haque, K. Sobayel, Vidhya Selvanathan, M. S. Jamal, M. S. Bashar, Munira Sultana, Mohammad Ismail Hossain, Md Shahiduzzaman, Merfat Algethami, Sami S. Alharthi, Nowshad Amin, Kamaruzzaman Sopian, Md Akhtaruzzaman
Summary: In this study, tungsten oxide (WOx) thin films were synthesized using the RF magnetron sputtering method with varying sputtering power. Different investigations were conducted to evaluate the morphological, optical, and dielectric properties of the films. The results showed that WOx films grown under different sputtering powers exhibited significant variations in these properties, making them suitable for optoelectronic applications.
Article
Materials Science, Multidisciplinary
C. R. Warren, V. Ortiz, L. Scipioni, J. Greer, J. Shi, Y. Kodera, J. E. Garay
Summary: It is found that the perpendicular magnetic anisotropy (PMA) in EuIG films grown by off-axis sputtering does not reduce substantially with thickness and remains robust in films thicker than 100 nm.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Polymer Science
Juan Jesus Rocha-Cuervo, Esmeralda Uribe-Lam, Cecilia Daniela Trevino-Quintanilla, Dulce Viridiana Melo-Maximo
Summary: This study presents an alternative post-curing treatment for photopolymer substrates considering the plasma produced via the sputtering process. The effect of sputtering plasma on the properties of Zn/ZnO thin films deposited on photopolymer substrates, with and without UV treatment, was analyzed. The results showed the influence of plasma as a post-cured treatment alternative and the effect on film thickness and roughness values.
Article
Chemistry, Physical
Ryan Bower, Matthew P. Wells, Freya Johnson, Rebecca Kilmurray, Brock Doiron, Eleonora Cali, Giuseppe Mallia, Bin Zou, Andrei P. Mihai, Nicholas M. Harrison, Sarah Fearn, Rupert Oulton, Neil McN. Alford, Lesley F. Cohen, Peter K. Petrov
Summary: This study investigates the optical response and electrical properties of reactively sputtered niobium oxynitride thin films through experimental and computational simulations. The experimental results show that these films have screened plasma wavelengths tunable over a range of 90 nm, and exhibit a double epsilon-near-zero behavior. This behavior is attributed to the incorporation of oxygen into the films during deposition.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
R. C. Rai, C. Horvatits, S. Deer
Summary: The study reveals that hexagonal HoFeO3 thin films exhibit weak ferromagnetism at low temperatures and a spin reorientation transition caused by Ho3+-Fe3+ interactions. Electronic excitations include Fe3+ d to d on-site transitions and charge transfer excitations from O 2p to Fe 3d, Ho 6s, and 5d.
Article
Physics, Applied
Namiki Uezono, Jiaqi Liu, Sachin A. Pawar, Muhammad Monirul Islam, Shigeru Ikeda, Takeaki Sakurai
Summary: A method for fabricating BiVO4 thin films with monoclinic-scheelite and tetragonal-zircon crystalline phases was developed using RF sputtering. The films deposited with the tetragonal-zircon phase showed a comparable photocurrent density to those with the monoclinic-scheelite phase, despite having a larger band gap. This is attributed to the reduced sputtering damage and the efficient utilization of photocarriers in the tetragonal-zircon crystal.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2023)
Article
Chemistry, Physical
Masami Aono, Masami Terauchi, Kyoji Morita, Tasuku Inoue, Kazuhiro Kanda, Ken Yonezawa
Summary: In this study, a-CNx thin films were deposited through RF magnetron sputtering with increasing nitrogen gas pressure to provide nitrogen radicals at high concentrations. The films' chemical bonding structures were evaluated using XPS, SXES, and NEXAFS, and compared with films deposited under uniform gas pressure. Increasing the gas pressure around the graphite target slightly increased the deposition rate and changed the chemical bonding structure of a-CNx films. However, the nitrogen content did not increase with the nitrogen gas pressure. The nitrogen incorporation in a-CNx films was more effective at higher RF powers, as indicated by SXES and NEXAFS spectra.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Hyun Min Kim, Jong Hoon Lee, Ahram Yom, Han Sol Lee, Dong Geun Kim, Dong Wan Ko, Hong Seung Kim, Ji-Hoon Ahn
Summary: SrRuO3 thin films have the potential for use as electrode layers, with key parameters such as oxygen flow ratio and post-deposition conditions needing to be carefully controlled for high-quality films to be deposited on SiO2 substrates.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Deepti Raj, Mauro Palumbo, Gianluca Fiore, Federica Celegato, Federico Scaglione, Paola Rizzi
Summary: A low-cost Nanoporous Gold (NPG) was successfully produced by chemical dealloying of supersaturated solid solution Au33Fe67 ribbons. The obtained NPG, with tunable ligament size and shape, showed impressive Surface-Enhanced Raman Scattering (SERS) effect and a detection limit as low as 10-15 M. It also exhibited great potential as an economical and highly sensitive SERS-active substrate for life science applications. The production process of NPG was inexpensive and sustainable.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Deepti Raj, Gabriele Barrera, Federico Scaglione, Federica Celegato, Matteo Cialone, Marco Coisson, Paola Tiberto, Jordi Sort, Paola Rizzi, Eva Pellicer
Summary: Dense and mesoporous FePd nanowires were successfully fabricated using template- and micelle-assisted pulsed potentiostatic electrodeposition. The structural and magnetic properties of the nanowires were investigated, and it was found that the mesoporous core and dense shell structure slightly affected the magnetic properties. Moreover, the mesoporous nanowires showed excellent performance as SERS substrates for the detection of 4,4'-bipyridine, attributed to the mesoporous morphology and the close proximity of the embedded nanowires enabling localized surface plasmon resonance.
Article
Chemistry, Multidisciplinary
Gabriele Barrera, Federico Scaglione, Federica Celegato, Marco Coisson, Paola Tiberto, Paola Rizzi
Summary: This study combines a fast and cost-effective dealloying process with a fast, low-cost, scalable electroless deposition technique to realize hybrid magnetic heterostructures. The gold nanoporous surface obtained by dealloying is used as a nanostructured substrate for the electrodeposition of cobalt, resulting in a patterned thin film with different magnetic properties. The structural and morphological features are correlated with the magnetic properties.
Article
Chemistry, Multidisciplinary
Marta Vassallo, Daniele Martella, Gabriele Barrera, Federica Celegato, Marco Coisson, Riccardo Ferrero, Elena S. Olivetti, Adriano Troia, Huseyin Sozeri, Camilla Parmeggiani, Diederik S. Wiersma, Paola Tiberto, Alessandra Manzin
Summary: Magnetic hyperthermia is a therapeutic technique that utilizes magnetic nanoparticles to induce controlled temperature increase in diseased tissues. Surface treatments, such as using sodium citrate coating, can enhance the heat release capability of the nanoparticles and improve dispersion and stability in solution. Fe3O4 nanoparticles synthesized in this study exhibit an SLP value of around 170 W/g under a 100 kHz and 48 kA/m magnetic field.
Article
Nanoscience & Nanotechnology
Marta Rojas-Rodriguez, Tania Fiaschi, Michele Mannelli, Leonardo Mortati, Federica Celegato, Diederik S. Wiersma, Camilla Parmeggiani, Daniele Martella
Summary: Liquid Crystalline Networks (LCNs) with different surface topographies obtained by self-assembly can efficiently control cell alignment and differentiation, providing biological models that cannot be reproduced spontaneously on standard culture dishes. These materials can guide the organization of different cell lines, including single cell alignment or high-density cell cultures. The rough surfaces formed by the spontaneous assembly of liquid crystals can control biological models without the need for lithographic patterning or complex fabrication procedures, opening up possibilities for in vitro formation of well-aligned muscle tissue.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Jussara Barale, Federico Nastro, Davide Violi, Paola Rizzi, Carlo Luetto, Marcello Baricco
Summary: This study comprehensively presents the on-site compression of green hydrogen using metal hydrides, including the setup of a metal hydride compressor and the energy consumption and efficiency considerations. The compressor achieves compression of hydrogen from 28 bar to 250 bar, with high isentropic efficiency and average hydrogen flowrate.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Laura de Kort, Peter Ngene, Marcello Baricco, Petra de Jongh, Valerio Gulino
Summary: It was found that the addition of silica nanoparticles to iodide-substituted LiBH4 significantly improves the ion conductivity and cycle life of all-solid state batteries. The synthesized h-Li(BH4)0.8(I)0.2-SiO2 demonstrates a Li+ conductivity of 9.3 x 10-5 S cm-1 at room temperature and an improved stability against Li-metal. The all-solid state battery Li|h-Li(BH4)0.8(I)0.2-SiO2|TiS2 showed good long-term cyclability, demonstrating the enhanced cycling stability of the electrolyte due to the addition of oxide nanoparticles.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Nanoscience & Nanotechnology
A. Sola, E. S. Olivetti, L. Martino, V. Basso
Summary: In order to evaluate the potential of polycrystalline MnBi as a transverse thermoelectric material, we conducted experimental investigations of its anomalous Nernst effect (ANE) using the heat flux method. By employing powder metallurgy, we prepared MnBi samples that can be shaped as desired and their magnetic properties can be tailored. In the sample with the highest remanent magnetization, we measured an ANE thermopower of -1.1 mu V/K at 1 T, after compensating for the ordinary Nernst effect caused by pure bismuth present in the polycrystalline sample. This value is comparable to those reported for single crystals in the literature.
Article
Chemistry, Physical
Annalisa Ferrarotti, Elisa Vittoria Ghiggini, Riccardo Rocca, Matteo Dotoli, Federico Scaglione, Claudio Errigo, Giancarlo Marchiaro, Marcello Baricco
Summary: Mathematical modelling and software simulation are effective tools for understanding and predicting corrosion processes. The COMSOL Multiphysics 5.6 software provides validated mathematical models for predicting and preventing corrosion. This study compared simulation results with laboratory tests to investigate the corrosion of zinc-coated steel sheets. The results of mathematical modelling and empirical tests allow estimation of the stability of the protective zinc layer over time. Discrepancies between analytical methods led to modifications in the model for better coherence with experimental data. A computational model of corrosion phenomena in an automotive component was developed, which could potentially replace time-consuming and expensive laboratory tests.
Article
Chemistry, Physical
Daniele De Caro, Michele Maria Tedesco, Jaume Pujante, Andrea Bongiovanni, Giovanni Sbrega, Marcello Baricco, Paola Rizzi
Summary: Sustainability is a crucial value for our society, and aluminum alloys are promising materials for achieving sustainability goals due to their strength and lightweight. However, the production of aluminum alloys emits a high amount of CO2. Therefore, the study and development of aluminum alloys with increased scrap content are essential. This study compared two sheet-aluminum 6181 alloys with different scrap content and a 6181 alloy from primary production. Results showed that secondary production alloys contained higher amounts of manganese, iron, and copper. The metallurgical and mechanical behaviors were similar to the primary produced alloy, but a decrease in formability was observed in high scrap content aluminum alloys.
Review
Materials Science, Multidisciplinary
Michele Maria Tedesco, Daniele De Caro, Paola Rizzi, Marcello Baricco
Summary: In this review, we compared nine different chemical compositions and several heat treatments of quenching and partitioning steels, and correlated these parameters with reported mechanical properties. We also considered sustainability and circular economy approaches for applications in the automotive sector, providing guidance for lightweighting and decarbonization of the steel industry.
Review
Energy & Fuels
Luca Pasquini, Kouji Sakaki, Etsuo Akiba, Mark D. Allendorf, Ebert Alvares, Jose R. Ares, Dotan Babai, Marcello Baricco, Jose Bellosta von Colbe, Matvey Bereznitsky, Craig E. Buckley, Young Whan Cho, Fermin Cuevas, Patricia de Rango, Erika Michela Dematteis, Roman V. Denys, Martin Dornheim, J. F. Fernandez, Arif Hariyadi, Bjrn C. Hauback, Tae Wook Heo, Michael Hirscher, Terry D. Humphries, Jacques Huot, Isaac Jacob, Torben R. Jensen, Paul Jerabek, Shin Young Kang, Nathan Keilbart, Hyunjeong Kim, Michel Latroche, F. Leardini, Haiwen Li, Sanliang Ling, Mykhaylo V. Lototskyy, Ryan Mullen, Shin-ichi Orimo, Mark Paskevicius, Claudio Pistidda, Marek Polanski, Julian Puszkiel, Eugen Rabkin, Martin Sahlberg, Sabrina Sartori, Archa Santhosh, Toyoto Sato, Roni Z. Shneck, Magnus H. Sorby, Yuanyuan Shang, Vitalie Stavila, Jin-Yoo Suh, Suwarno Suwarno, Le Thi Thu, Liwen F. Wan, Colin J. Webb, Matthew Witman, ChuBin Wan, Brandon C. Wood, Volodymyr A. Yartys
Summary: This review summarizes the latest research progress on hydrides based on magnesium and intermetallic compounds for energy storage. It covers topics such as hydrogen sorption mechanisms, synthesis and processing techniques, catalysts, and the development of new compounds. The article highlights the important role of these hydrides in the clean energy transition and the deployment of hydrogen as an energy vector.
PROGRESS IN ENERGY
(2022)
