Article
Materials Science, Multidisciplinary
Eduard-Nicolae Sirjita, Alexandre Boulle, Jean-Christophe Orlianges, Richard Mayet, Aurelian Crunteanu
Summary: Epitaxial vanadium dioxide (VO2) films with large resistivity ratios have been grown on sapphire substrates by reactive magnetron sputtering. The structure and morphology of the films are influenced by deposition and annealing temperature, and these factors also affect the electrical properties of the films. VO2 films with high resistivity ratios can be obtained under optimal experimental conditions and are scalable for large-scale industrial applications.
Article
Crystallography
Pawel Polak, Jan Jamroz, Tomasz K. Pietrzak
Summary: In this paper, metal-insulator transitions in vanadium (III) and (IV) oxides were observed using contemporary laboratory equipment. Precise investigation of changes in crystallographic structure as a function of temperature, observation of thermal effects, and quasi-continuous measurement of conductivity revealed considerable hysteresis in the transitions of these materials.
Article
Chemistry, Multidisciplinary
Yu Lan, Guowen Yang, Yangping Li, Yuheng Wang, Qianqian Shi, Guanghua Cheng
Summary: In this study, the phase transition properties of V2O5 thin films were first explored using femtosecond laser-induced pump-probe spectroscopy. The results show that the phase transition processes occur on an ultrafast timescale and are dependent on the properties of the substrates and the energy density of the pump laser. The proposed oxygen vacancies theory provides valuable insights into potential applications of V2O5 films.
Article
Multidisciplinary Sciences
Jiyu Xu, Daqiang Chen, Sheng Meng
Summary: Photoexcitation has been proven as an efficient way to trigger phase transitions in strongly correlated materials. However, the atomistic mechanisms behind the structural phase transitions (SPTs) and electronic insulator-metal transitions (IMTs) in VO2 have been controversial. This study clarifies some key controversies and provides insights into the underlying atomistic processes and decoupling nature of photoinduced SPT and IMT in nonequilibrium states.
Article
Chemistry, Physical
Dooyong Lee, Taewon Min, Jiwoong Kim, Sehwan Song, Jisung Lee, Haeyong Kang, Jouhahn Lee, Deok-Yong Cho, Jaekwang Lee, Jae Hyuck Jang, Sungkyun Park
Summary: The study found that octahedral symmetry in VO2 can control its IMT characteristics by changing orbital occupancy, and monoclinic VO2 with high octahedral symmetry exhibits bandwidth-controlled IMT characteristics.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Multidisciplinary Sciences
Jan O. Schunck, Florian Doering, Benedikt Roesner, Jens Buck, Robin Y. Engel, Piter S. Miedema, Sanjoy K. Mahatha, Moritz Hoesch, Adrian Petraru, Hermann Kohlstedt, Christian Schuessler-Langeheine, Kai Rossnagel, Christian David, Martin Beye
Summary: This study demonstrates the use of imaging soft X-ray absorption spectroscopy to investigate the insulator-metal transition in vanadium dioxide thin-film microstructures. The experimental results show that the transition temperature for the conversion from insulating to metallic vanadium dioxide is lower near the structure edges compared to the center. The technique provides a detailed understanding of the relationship between the electronic properties of quantum materials and their patterning at the micrometer scale.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Physical
J. Outon, E. Blanco, M. Dominguez, H. Bakkali, J. M. Gonzalez-Leal, J. J. Delgado, M. Ramirez-del-Solar
Summary: By synthesizing M1 VO2 porous films, the study investigated the influence of different processing parameters on their thermochromic behavior and found a balance between significant thermochromic effect and high luminous transmittance. Film-silica glass-film systems with high luminous transmittance and significant IR solar modulation ability were prepared.
APPLIED SURFACE SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Sumaiya Kabir, Shruti Nirantar, Mahta Monshipouri, Mei Xian Low, Sumeet Walia, Sharath Sriram, Madhu Bhaskaran
Summary: Vanadium dioxide (VO2) is a versatile phase change material that undergoes insulator-to-metal transition triggered by various stimuli, with electrical stimuli offering greater control over specific regions. A metal-insulator-metal (MIM) structure study showed that the overlapping electrode arrangement requires the least voltage for switching, while the insulator-to-metal transition in VO2 is independent of electrode overlap and channel width. These findings are crucial for designing energy-efficient, addressable, and scalable micro/nanoscale devices and sensor applications using VO2.
ADVANCED ELECTRONIC MATERIALS
(2022)
Article
Materials Science, Ceramics
Zhenyu Gao, Zhe Liu, Yunjie Ping, Ziteng Ma, Xu Li, Changwei Wei, Chunqing He, Yong Liu
Summary: In this study, Ni-doped VO2 films were prepared to regulate the phase transition temperature, leading to the transformation of monoclinic VO2 to rutile phase. The appearance of rutile VO2 microcrystals in the films due to Ni doping significantly facilitated the phase transition process.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Xiang Dong, Yuanjie Su, Zhiming Wu, Xiangdong Xu, Zihao Xiang, Yuanlin Shi, Wenyu Chen, Jinhong Dai, Zhangying Huang, Tao Wang, Yadong Jiang
Summary: This study explored the effects of pulse frequency on the properties of VOx films prepared by reactive pulsed DC magnetron sputtering. It was found that adjusting the pulse frequency can influence the microstructure, surface morphology, and composition of the films. The temperature-dependent electrical properties of the films can also be tailored for specific applications by adjusting the pulse frequency.
APPLIED SURFACE SCIENCE
(2021)
Article
Engineering, Environmental
Xuena Xu, Yumin Qian, Chunting Wang, Zhongchao Bai, Chenggang Wang, Ming Song, Yi Du, Xun Xu, Nana Wang, Jian Yang, Yitai Qian, Shixue Dou
Summary: In this study, nitrogen-doped V2O5 is introduced as the cathode material for aqueous zinc-ion batteries. The N-doping improves electronic conductivity and facilitates Zn2+ diffusion by lowering the bandgap energy of V2O5 and changing its diffusion pathway. Furthermore, N-doping enhances the structural stability of the electrode material, leading to excellent electrochemical properties.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Jianming Zhu, Peng Zhao, Minghai Jing, Hangjin Wu, Jiangjiang Li
Summary: Vanadium-nitrogen alloy was prepared at 900 degrees C using a coupled electric and thermal field. Different alternating current densities were investigated for their effect on the material phase and chemical composition of nitridation products. The study found that the current densities significantly influenced the formation of the VN phase and the nitrogen content in the final products, with higher current densities leading to a decrease in nitrogen content as VN transformed into a solid solution. The Joule heating effect and simulation results showed an inhomogeneous real temperature distribution in the samples.
Article
Chemistry, Physical
Su-Ho Cho, Jun-Seob Park, Jong Heon Kim, Yun-Hee Chang, Jaewan Ahn, Jong Seok Nam, Ji-Won Jung, Il-Doo Kim, Hyun-Suk Kim
Summary: In this study, an optimized V2O5 thin-film electrode was prepared by controlling the oxygen pressure during the sputtering process. The electrode exhibited enhanced electrochemical activities, low polarization, improved ion diffusion, and increased electrical conductivities. Density functional theory calculations revealed that the oxygen-deficient V2O5-x had a lower Zn2+-ion diffusion energy barrier than pristine V2O5, contributing to its superior electrochemical performance.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Xianyu Liu, Liwen Ma, Yehong Du, Qiongqiong Lu, Aikai Yang, Xinyu Wang
Summary: Aqueous zinc-ion batteries with vanadium pentoxide nanofibers/carbon nanotubes hybrid film as binder-free cathode exhibited higher capacity, better cyclability, and superior energy/power density, making it highly promising for large-scale energy storage applications.
Article
Materials Science, Multidisciplinary
Donyawan Chittinan, Prathan Buranasiri, Tossaporn Lertvanithphol, Pitak Eiamchai, Khwanchai Tantiwanichapan, Asmar Sathukarn, Saksorn Limwichean, Annop Klamchuen, Tuksadon Wutikhun, Pichet Limsuwan, Hideki Nakajima, Wuttichai Phae-ngam, Narit Triamnak, Mati Horprathum
Summary: Titanium dioxide (TiO2) thin films were deposited on silicon (100) and glass substrates using conventional reactive sputtering and reactive gas-timing (RGT) sputtering techniques. The duty cycle of O2 gas influenced the properties of the TiO2 films, as determined by spectroscopic ellipsometry (SE). The films' structure and optical properties were analyzed and compared using a triple-layer model for SE fitting, high-resolution transmission electron microscope (HR-TEM), and grazing-incidence X-ray diffraction (GIXRD). The deposition rate and crystalline phase of the TiO2 films were found to be influenced by the duty cycle.
Article
Chemistry, Physical
Monika Czerny, Grzegorz Cios, Wojciech Maziarz, Yuri Chumlyakov, Robert Chulist
Article
Chemistry, Physical
Lukasz Hawelek, Tymon Warski, Patryk Wlodarczyk, Marcin Polak, Przemyslaw Zackiewicz, Wojciech Maziarz, Anna Wojcik, Magdalena Steczkowska-Kempka, Aleksandra Kolano-Burian
Summary: This study reports the optimization of the conventional heat treatment process for Cu-free Fe72Ni8Nb4Si2B14 alloy to obtain the least lossy magnetic properties, as well as the measurement of complex permeability and core power losses. The investigation of crystal structure and glass relaxation process provide deeper insights into the soft magnetic properties, emphasizing the importance of controlling the glass relaxation process for proper magnetic properties in Cu-free soft magnetic materials.
Article
Chemistry, Analytical
Tadeusz Pisarkiewicz, Wojciech Maziarz, Artur Malolepszy, Leszek Stobinski, Dagmara Agnieszka Michon, Aleksandra Szkudlarek, Marcin Pisarek, Jaroslaw Kanak, Artur Rydosz
Summary: The study involved the deposition of multilayers containing graphene oxide and alpha-Fe2O3 on ceramic substrates using the spray LbL coating technique. The multilayer resistance decreased when oxidizing NO2 gas was introduced, with sensitivity increasing at higher temperatures. The hybrid structure showed enhanced conductivity due to chemisorbed O-2 and NO2 acting as electron traps.
Article
Chemistry, Physical
Tymon Warski, Adrian Radon, Przemyslaw Zackiewicz, Patryk Wlodarczyk, Marcin Polak, Anna Wojcik, Wojciech Maziarz, Aleksandra Kolano-Burian, Lukasz Hawelek
Summary: The effect of substituting Fe with Cu on the crystal structure and magnetic properties of Fe-Ni-Nb-Si-B alloys was investigated. The optimal soft magnetic properties were observed in samples annealed at 460 degrees C, with low Hc, high Bs and low core power losses, as well as high magnetic permeability. Structural studies were conducted using X-ray diffraction and transmission electron microscope.
Article
Materials Science, Multidisciplinary
Lukasz Dubiel, Andrzej Wal, Ireneusz Stefaniuk, Antoni Zywczak, Wojciech Maziarz
Summary: This paper investigates the electron magnetic resonance (EMR) of Ni47Co3Mn35.5In14.5 alloy in ribbon and powder form, finding that the EMR spectra differ between the two forms. The magnetic properties of the alloy were also studied using a vibrating sample magnetometer (VSM), showing shifts in Curie temperature and changes in EMR spectra shape with powdering.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
P. Czaja, J. Przewoznik, L. Hawelek, A. Chrobak, P. Zackiewicz, W. Maziarz
Summary: This study investigated the martensitic transformation, magnetic entropy, and direct adiabatic temperature changes in Ni48Mn39.5Sn12.5-xInx (x = 2, 4, 6) metamagnetic Heusler bulk and grain-constrained ribbon alloys. The results showed that In content influenced the alloy properties, with changes in magnetic entropy increasing with higher In concentrations.
JOURNAL OF MATERIALS RESEARCH
(2021)
Article
Chemistry, Physical
Aleksandra Kolano-Burian, Przemyslaw Zackiewicz, Agnieszka Grabias, Anna Wojcik, Wojciech Maziarz, Maciej Szlezynger, Patryk Wlodarczyk, Maciej Kowalczyk, Lukasz Hawelek
Summary: In this study, the thermal/crystallization behavior and magnetic properties of materials with Fe84.5-xCoxNb5B8.5P2 composition were investigated in detail using various analytical techniques, with subsequent nanocrystallization processes. The results revealed the influence of Co content on alloy properties and the effects of processing in an external magnetic field on magnetic properties.
Article
Chemistry, Physical
Lukasz Dubiel, Andrzej Wal, Ireneusz Stefaniuk, Antoni Zywczak, Piotr Potera, Wojciech Maziarz
Summary: Our study focused on the annealing effect and its impact on magnetic and structural properties of a series of Heusler alloys Ni50-xCoxMn35.5In14.5 (x = 0, 3, 5) prepared in ribbon form. We used scanning electron microscopy (SEM) equipped with an X-ray microanalyzer (EDX) to study morphology and composition, while magnetic properties were determined using electron magnetic resonance (EMR) and vibrating sample magetometer (VSM). We found that cobalt content in the annealed samples reveals an additional magnetic phase transition at lower temperatures.
Article
Materials Science, Multidisciplinary
Anna Wojcik, Robert Chulist, Pawel Czaja, Maciej Kowalczyk, Przemyslaw Zackiewicz, Norbert Schell, Wojciech Maziarz
Summary: The annealing treatment of 10M Ni-Mn-Ga melt-spun ribbons resulted in a homogenous microstructure and crystallographic texture, reducing microstructural constraints for twin variant reorientation and improving in-plane stress/strain compatibility. This led to a 1.15% magnetic field-induced strain without the aid of mechanical training.
Article
Chemistry, Physical
Lukasz Hawelek, Tymon Warski, Adrian Radon, Adam Pilsniak, Wojciech Maziarz, Maciej Szlezynger, Mariola Kadziolka-Gawel, Aleksandra Kolano-Burian
Summary: In this study, the influence of Cu for Fe substitution on the crystal structure and magnetic properties of Fe85B15 alloy was comprehensively investigated based on thermodynamic predictions and heat treatment optimization. It was found that the alloy with 0.6% Cu content exhibited the minimum Delta G(amoprh) value, and the nanocomposite state obtained by annealing under optimal conditions showed the least core power losses.
Article
Engineering, Multidisciplinary
Natalia Rylko, Pawel Kurtyka, Olesia Afanasieva, Simon Gluzman, Ewa Olejnik, Anna Wojcik, Wojciech Maziarz
Summary: We have developed a fast and effective method for multiscale analysis of complex structured composite materials. This method overcomes the limitations of classic image analysis methods in resolving heterogeneity and phase separation issues. It combines image analysis, statistics, Fourier analysis, and analytical Representative Volume Element methods to compute structural sums and calculate macroscopic properties. The method is based on real experimental data and allows for accurate reconstruction of particle positions. It establishes a solid foundation for building a database for classifying composite structures.
INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE
(2022)
Article
Biochemistry & Molecular Biology
Andrzej Hudecki, Dorota Lyko-Morawska, Anna Kasprzycka, Alicja Kazek-Kesik, Wirginia Likus, Jolanta Hybiak, Kornelia Jankowska, Aleksandra Kolano-Burian, Patryk Wlodarczyk, Weronika Wolany, Jaroslaw Markowski, Wojciech Maziarz, Iwona Niedzielska, Wojciech Pakiela, Mariusz Nowak, Marek J. Los
Summary: This study developed a new composite biomaterial based on hydroxyapatite with different dopants, which showed good mechanical properties and bacteriostatic effects against Gram-positive bacteria.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Engineering, Electrical & Electronic
Krystyna Schneider
Summary: The point defect structure of V2O3, VO2, and V2O5 is reviewed in this paper. VO2 and V2O5 thin films were deposited and their chemical and phase composition as well as the distribution of elements were characterized using RBS and SIMS. Electrical properties of V2O5 thin films were measured using impedance spectroscopy. It was found that the thin films interacted with oxygen at elevated temperatures, resulting in the formation of oxygen vacancies and electrons.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Review
Materials Science, Multidisciplinary
Wojciech Maziarz, Miroslav Greger, Piotr Dlugosz, Jan Dutkiewicz, Anna Wojcik, Lukasz Rogal, Katarzyna Stan-Glowinska, Ondrej Hilser, Martin Pastrnak, Lubomir Cizek, Stanislav Rusz
Summary: AlSi11 matrix composites reinforced with SiC particles were fabricated by high pressure die casting assisted by ultrasonic mixing. A severe plastic deformation process was conducted on the composite using modified channel with twisted output (TCAP) at temperatures of 350, 400, and 450 ?. The TCAP tool enabled the refinement of the dendritic cast microstructure of the composite, resulting in a matrix with equiaxed a(Al) grains and twinned b(Si) particles. The TCAP process also caused a decrease in sample hardness due to dynamic recrystallization. The composite exhibited high plastic deformation and compressive strength when tested by compression tests.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Physical
Anita Olszowka-Myalska, Patryk Wrzesniowski, Hanna Myalska-Glowacka, Wojciech Maziarz, Marcin Godzierz
Summary: This paper discusses the possibility of using carbon nanotubes as an additive in metallic materials. The study shows that the addition of multi-walled carbon nanotubes affects the phase morphology of sintered composites made from magnesium powder and nanosized silicon. The carbon nanotubes were found to be a component of the composite's skeleton, and no transformation or changes in their morphology were observed. These findings have implications for the design of different types of composites and Mg2Si-based thermoelectric materials and intermetallic alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
