Article
Materials Science, Multidisciplinary
Ravi Teja Mittireddi, Nisha Hiralal Makani, Deepak G. Prajapati, Abhay Raj Singh Gautam, Rupak Banerjee, Emila Panda
Summary: This study focuses on quantifying the impact of microstructure on the functionality of titanium dioxide films caused by minor changes in the fabrication process. Thin titanium dioxide films are deposited using sputtering with variations in target composition and working environment. Various characterization techniques are employed to quantitatively analyze the phase, chemical constitution, composition, thickness, roughness, density, etc. of the films and their link to electronic structure, electrical, optical, and surface characteristics. The insights from this study can guide the experimental design for fabricating films with desired functionalities by considering the tolerance range.
MATERIALS CHARACTERIZATION
(2023)
Article
Chemistry, Physical
Jan Krajczewski, Aleksandra Michalowska, Radim Ctvrtlik, Libor Nozka, Jan Tomastik, Lukas Vaclavek, Sylwia Turczyniak-Surdacka, Krzyszof Bienskowski, Renata Solarska
Summary: This study compares the SERS activity of TiN and Au nano/micro-structures with the same morphology for the first time. Si pyramids were formed and coated with Au and TiN layers of different thicknesses. The platforms exhibited plasmonic properties in the visible range and were effective SERS platforms. The thickest layers of both Au and TiN showed the highest enhancement factor (EF), and even low concentrations of tartrazine could be detected.
APPLIED SURFACE SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Samira Dorri, Justinas Palisaitis, Grzegorz Greczynski, Ivan Petrov, Jens Birch, Lars Hultman, Babak Bakhit
Summary: We studied the oxidation properties of sputter-deposited TiB2.5 coatings at different temperatures. The results showed that at 600 degrees Celsius, the coating exhibited protective oxidation behavior, and the structure of the oxide layer also changed. Moreover, decreasing the heating rate had a noticeable impact on the oxidation process.
Article
Biochemistry & Molecular Biology
Irina Yu. Zhuravleva, Maria A. A. Surovtseva, Andrey A. A. Vaver, Evgeny A. A. Suprun, Irina I. I. Kim, Natalia A. A. Bondarenko, Oleg S. S. Kuzmin, Alexander P. P. Mayorov, Olga V. V. Poveshchenko
Summary: The cytocompatibility of titanium oxides and oxynitrides thin films is highly dependent on the surface topography. The study investigated the effect of different surface topography on the cytocompatibility of coatings using 16 groups of samples. It was found that the surface nanostructure plays a crucial role in the cytocompatibility of thin films.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Physical
Nicolau Lopez-Pinto, Thomas Tom, Joan Bertomeu, Jose Miguel Asensi, Eloi Ros, Pablo Ortega, Cristobal Voz
Summary: Reduced molybdenum oxide films were deposited using a molybdenum trioxide target in different pressures and atmospheres, showing that stoichiometry could be controlled by adding hydrogen in the sputtering chamber. Increasing the substrate temperature led to the presence of metastable Mo4+ states at 3 mTorr. The optical properties matched literature values, with transmittances reaching 90%.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Analytical
Ewa Mankowska, Michal Mazur, Jaroslaw Domaradzki, Piotr Mazur, Malgorzata Kot, Jan Ingo Flege
Summary: Hydrogen is a clean energy source, but safety concerns arise due to its explosive nature at high concentrations. To meet the need for reliable monitoring systems, this study investigated mixed copper-titanium oxide thin films as hydrogen sensing materials. The films showed a sensor response to hydrogen at a low operating temperature without additional catalysts. The best response and sensitivity were found in films with similar atomic concentrations of copper and titanium.
Article
Chemistry, Physical
S. B. Eadi, Jae Sub Oh, Chaehwan Kim, Gapseop Sim, Kwanghee Kim, Hee Yeoun Kim, Jae Jeong Kim, Hyeong Rok Do, Sung-il Chu, Seng Hwan Jung, H. D. Lee
Summary: This study investigated the hydrogen detection ability of palladium-nickel alloy films with different nickel concentrations. Pd-Ni alloy sensors were fabricated using the co-sputtering method. The experimental results showed that the response of the Pd-Ni alloy sensor decreased linearly with an increase in the nickel concentration up to 8%. The resistance of the Pd-Ni alloy was reversible upon exposure to hydrogen gas, exhibiting absorption and desorption characteristics. The Pd-Ni alloy sensor exhibited a faster response time of 11 s compared to pure Pd, and demonstrated great selectivity and stability over a period of 90 days.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Biochemistry & Molecular Biology
Irina Yu. Zhuravleva, Maria A. A. Surovtseva, Alina A. A. Alshevskaya, Nikolay V. V. Surovtsev, Konstantin A. A. Okotrub, Irina I. I. Kim, Dmitriy A. A. Nasimov, Natalia A. A. Bondarenko, Oleg S. S. Kuzmin, Olga V. V. Poveshchenko
Summary: This study developed an integral cytocompatibility index and a decision tree algorithm to assess the cytocompatibility of TiO2 and N-TiO2 coatings. The results showed that the sample dominated by the rutile phase exhibited the best cytocompatibility. The DTA provided more detailed information about cytocompatibility.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Materials Science, Coatings & Films
Hui-Ping Fan, Xin-Xian Yang, Fu-Hsing Lu
Summary: In this study, quaternary titanium-aluminum oxynitride films with various nitrogen and oxygen compositions were successfully produced by changing the reactive gas and gas flow ratio. The obtained films showed different structures and properties.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Chemistry, Physical
Necmettin Kilinc, Senem Sanduvac, Mustafa Erkovan
Summary: Platinum-nickel alloy thin films deposited on a glass substrate by sputter technique exhibit good hydrogen sensing properties, with the Pt-79-Ni-21 alloy thin film showing the best performance across all temperature ranges. The detection limit for Pt and Pt-Ni alloy thin films is below 1 ppm, and the response times decrease with increasing H-2 concentration and temperature.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Mohammad Amin Gharavi, Arnaud le Febvrier, Jun Lu, Grzegorz Greczynski, Bjorn Alling, Rickard Armiento, Per Eklund
Summary: (Ti-0.5, Mg-0.5)N thin films were synthesized by reactive dc magnetron sputtering, exhibiting a rock-salt cubic structure and a LiTiO2-type superstructure. The films have an electrical resistivity of 150 mΩ*cm and a Seebeck coefficient of -25 μV/K. High temperature annealing in a nitrogen atmosphere leads to the formation of the cubic superstructure. Density functional theory calculations show a 0.07 eV direct bandgap for the LiTiO2-type TiMgN2 structure.
Article
Materials Science, Coatings & Films
Joao Pedro Lopes do Nascimento, Murilo Oliveira Alves Ferreira, Rogerio Valentim Gelamo, Jair Scarminio, Teresa Tromm Steffen, Brunela Pereira da Silva, Idalina Vieira Aoki, Adilar Goncalves dos Santos Jr, Victor Velho de Castro, Celia de Fraga Malfatti, Jeferson Aparecido Moreto
Summary: In this study, polycrystalline niobium oxide thin films were successfully produced on Ti-6Al-4V alloy surfaces using reactive sputtering technique and characterized using various analytical methods. The results demonstrated that the niobium oxide thin films acted as an effective protective barrier against corrosion process evolution over time, showing lower current density and better corrosion performance compared to the bare alloy.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Coatings & Films
Niklas Hellgren, Alexander Sredenschek, Andrejs Petruins, Justinas Palisaitis, Fedor F. Klimashin, Maurico A. Sortica, Lars Hultman, Per O. A. Persson, Johanna Rosen
Summary: Titanium boride thin films with varying B/Ti ratio were successfully grown using DC magnetron co-sputtering. The films exhibited high hardness and low resistivity, with different grain sizes and crystalline characteristics after annealing.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Chemistry, Physical
Ramon Azpiroz, Enrique Carretero, Ana Cueva, Aida Gonzalez, Manuel Iglesias, Jesus J. Perez-Torrente
Summary: The magnetron sputtering technique is successfully used to prepare porous TiO2 thin films on soda-lime glasses. The morphology of the thin layers is influenced by deposition parameters, and the best angle and oxidation level achieve desired porosity and film thickness. The presence of a porous film is essential for achieving photocatalytic activity.
APPLIED SURFACE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Susmita Chowdhury, Rachana Gupta, Shashi Prakash, Layanta Behera, D. M. Phase, Mukul Gupta
Summary: The study investigates the effects of tunable synthesis parameters and Ti interface on the properties of TiN thin films deposited by ion beam sputtering. Through adjusting the partial pressure of N-2 gas, ion energy, and the presence of a Ti interface, dense and smooth TiN films with low resistivity were achieved. The study demonstrates the importance of these factors in optimizing the growth of TiN thin films without the need for high temperatures or substrate biasing.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Nanoscience & Nanotechnology
Jie Zhang, Xiaoyang Chen, MingJian Ding, Jiaqiang Chen, Ping Yu
Summary: This study enhances the compositional inhomogeneity of relaxor ferroelectric thin films to improve their dielectric temperature stability. The prepared films exhibit a relatively high dielectric constant and a very low variation ratio of dielectric constant over a wide temperature range.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Xiaoyu Chen, Ranran Zhang, Hao Zou, Ling Li, Qiancheng Zhu, Wenming Zhang
Summary: Polyaniline-manganese dioxide composites exhibit high conductivity, long discharge platform, and stable circulation, and the specific capacity is increased by providing additional H+ ions to participate in the reaction.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Xutao Huang, Yinping Chen, Jianjun Wang, Gang Lu, Wenxin Wang, Zan Yao, Sixin Zhao, Yujie Liu, Qian Li
Summary: This study aims to establish a novel approach to better understand and predict the behavior of materials with multi-scale lamellar microstructures. High-resolution reconstruction and collaborative characterization methods are used to accurately represent the microstructure. The mechanical properties of pearlite are investigated using crystal plasticity simulation and in-situ scanning electron microscopy tensile testing. The results validate the reliability of the novel strategy.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Cheng Chen, Fanchao Meng, Jun Song
Summary: This study systematically investigated the unfaulting mechanism of single-layer interstitial dislocation loops in irradiated L12-Ni3Al. The unfaulting routes of the loops were uncovered and the symmetry breaking during the unfaulting processes was further elucidated. A continuum model was formulated to analyze the energetics of the loops and predict the unfaulting threshold.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Darshan Bamney, Laurent Capolungo
Summary: This work investigates the formation of adjoining twin pairs (ATPs) at grain boundaries (GBs) in hexagonal close-packed (hcp) metals, focusing on the co-nucleation (CN) of pairs of deformation twins. A continuum defect mechanics model is proposed to study the energetic feasibility of CN of ATPs resulting from GB dislocation dissociation. The model reveals that CN is preferred over the nucleation of a single twin variant for low misorientation angle GBs. Further analysis considering GB character and twin system alignment suggests that CN events could be responsible for ATP formation even at low m' values.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Bing Han, Zhengqian Fu, Guoxiang Zhao, Xuefeng Chen, Genshui Wang, Fangfang Xu
Summary: This study investigates the behavior of electric-field induced antiferroelectric to ferroelectric (AFE-FE) phase transition and reveals the evolution of atomic displacement ordering as the cause for the transition behavior changing from sharp to diffuse. The novel semi-ordered configuration results from the competing interaction between long-range displacement modulation and compositional inhomogeneity, which leads to a diffuse AFE-FE transition while maintaining the switching field.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Akib Jabed, Golden Kumar
Summary: This study demonstrates that cryogenic rejuvenation promotes homogeneous-like flow and increases ductility in metallic glass samples. Conversely, annealing has the opposite effect, resulting in a smoother fracture surface.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Xin Ji, Yan Chong, Satoshi Emura, Koichi Tsuchiya
Summary: A heterogeneous microstructure in Ti-15Mo-3Al alloy with heterogeneous distributions of Mo element and omega(iso) precipitates has achieved a four-fold increase in tensile ductility without a loss of tensile strength, by blocking the propagation of dislocation channels and preventing the formation of micro-cracks.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Amit Samanta, Prasanna Balaprakash, Sylvie Aubry, Brian K. Lin
Summary: This study proposes a combined large-scale first principles approach with machine learning and materials informatics to quickly explore the chemistry-composition space of advanced high strength steels (AHSS). The distribution of aluminum and manganese atoms in iron is systematically explored using first principles calculations to investigate low stacking fault energy configurations. The use of an automated machine learning tool, DeepHyper, speeds up the computational process. The study provides insights into the distribution of aluminum and manganese atoms in systems containing stacking faults and their effects on the equilibrium distribution.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Guowei Zhou, Yuanzhe Hu, Zizheng Cao, Myoung Gyu Lee, Dayong Li
Summary: In this work, a physics-constrained neural network is used to predict grain-level responses in FCC material by incorporating crystal plasticity theory. The key feature, shear strain rate of slip system, is identified based on crystal plasticity and incorporated into the loss function as physical constitutive equations. The introduction of physics constraints accelerates the convergence of the neural network model and improves prediction accuracy, especially for small-scale datasets. Transfer learning is performed to capture complex in-plane deformation of crystals with any initial orientations, including cyclic loading and arbitrary non-monotonic loading.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Pengfei Yang, Qichang Li, Zhongying Wang, Yuxiao Gao, Wei Jin, Weiping Xiao, Lei Wang, Fusheng Liu, Zexing Wu
Summary: In this study, the HER performance of Ru-based catalysts is significantly improved through the dual-doping strategy. The obtained catalyst exhibits excellent performance in alkaline freshwater and alkaline seawater, and can be stably operated in a self-assembled overall water splitting electrolyzer.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Ilias Bikmukhametov, Garritt J. Tucker, Gregory B. Thompson
Summary: Depositing a Ni-1at. % P film can facilitate the formation of multiple quintuple twin junctions, resulting in a five-fold twin structure and a pentagonal pyramid surface topology. The ability to control material structures offers opportunities for creating novel surface topologies, which can be used as arrays of field emitters or textured surfaces.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Zening Yang, Weiwei Sun, Zhengyu Sun, Mutian Zhang, Jin Yu, Yubin Wen
Summary: Multicomponent oxides (MCOs) have wide applications and accurately predicting their thermal expansion remains challenging. This study introduces an innovative attention-based deep learning model, which achieves improved performance by using two self-attention modules and demonstrates adaptability and interpretability.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Ze Liu, Cai Chen, Yuanxun Zhou, Lanting Zhang, Hong Wang
Summary: This study attempts to address the gap in cooling rates between thin film deposition and bulk metallic glass (BMG) casting by correlating the glass-forming range (GFR) determined from combinatorial materials chips (CMCs) with the glass-forming ability (GFA) of BMG. The results show that the full-width at half maximum (FWHM) of the first sharp diffraction peak (FSDP) is a good indicator of BMG GFA, and strong positive correlations between FWHM and the critical casting diameter (Dmax) are observed in various BMG systems. Furthermore, the Pearson correlation coefficients suggest possible similarities in the GFA natures of certain BMG pairs.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Mike Schneider, Jean-Philippe Couzinie, Amin Shalabi, Farhad Ibrahimkhel, Alberto Ferrari, Fritz Koermann, Guillaume Laplanche
Summary: This work aims to predict the microstructure of recrystallized medium and high-entropy alloys, particularly the density and thickness of annealing twins. Through experiments and simulations, a database is provided for twin boundary engineering in alloy development. The results also support existing theories and empirical relationships.
SCRIPTA MATERIALIA
(2024)