Article
Chemistry, Physical
Sebastian M. J. Beer, Arbresha Muriqi, Patrick Lindner, Manuela Winter, Detlef Rogalla, Michael Nolan, Andreas Ney, Jorg Debus, Anjana Devi
Summary: Europium sulfide (EuS) thin films grown via chemical vapor deposition (CVD) exhibit high quality, stoichiometry, and tunability, with the advantage of avoiding the use of toxic hydrogen sulfide.
CHEMISTRY OF MATERIALS
(2022)
Review
Chemistry, Multidisciplinary
Pawel Wojciechowski, Mikolaj Lewandowski
Summary: This article presents the current state-of-the-art in the growth, structure, and physicochemical properties of iron nitride thin films. Different phases of iron nitride are introduced based on crystallographic structure and the Fe-N phase diagram. Preparation methods for thin iron nitride films are described. The structure, electronic, and magnetic properties of the films are discussed. Potential applications of iron nitride films and the challenges faced in the field are highlighted, providing a starting point for further research on these fascinating materials.
CRYSTAL GROWTH & DESIGN
(2022)
Review
Chemistry, Multidisciplinary
Pawel Wojciechowski, Mikolaj Lewandowski
Summary: This article presents the current state-of-the-art in the growth, structure, and physicochemical properties of iron nitride thin films. It introduces different phases of iron nitride based on their crystallographic structure and discusses preparation methods. Furthermore, it explores the structure, electronic, and magnetic properties of the films and highlights potential applications and challenges in the field. This review serves as a starting point for researchers interested in studying these fascinating materials, whose scientific and technological potential has not been fully explored.
CRYSTAL GROWTH & DESIGN
(2022)
Article
Chemistry, Physical
Yonghao Gan, Meilin Cui, Xiaoping Dai, Ying Ye, Fei Nie, Ziteng Ren, Xueli Yin, Baoqiang Wu, Yihua Cao, Run Cai, Xin Zhang
Summary: Large-scale electrolysis of water for high-purity hydrogen production is an effective solution to the energy crisis and environmental pollution. However, the lack of efficient, cheap, and stable catalysts hinders its industrial application. In this study, Mn-doped nickel ferrite nanosheets were synthesized using a simple hydrothermal process, displaying excellent electrocatalytic activity for the oxygen evolution reaction. The unique structure of the nanosheets and the effects of Mn doping contribute to the enhanced performance.
Article
Materials Science, Ceramics
M. Zzaman, R. Dawn, Z. Aabdin, R. Shahid, R. Meena, A. Kandasami, V. R. Singh
Summary: Ion irradiation alters the physical properties of oxide materials. This study examines the impact of 150 keV Fe and Ni ion irradiation on VO2 thin films. The results show that ion irradiation modifies the metal-insulator transition temperature of VO2 and changes the oxidation states of Vanadium ions, leading to metallization of VO2.
CERAMICS INTERNATIONAL
(2023)
Article
Physics, Applied
Sudhir Regmi, Zhong Li, Abhishek Srivastava, Rabin Mahat, Shambhu Kc, Ankur Rastogi, Zbigniew Galazka, Ranjan Datta, Tim Mewes, Arunava Gupta
Summary: The research shows that the growth of NiFe2O4 thin films on MgGa2O4 and ZnGa2O4 substrates varies significantly, with films grown on ZnGa2O4 substrate having near perfect matching and almost no strain, maintaining their cubic structure; while films grown on MgGa2O4 substrate exhibit significant strain.
APPLIED PHYSICS LETTERS
(2021)
Article
Materials Science, Ceramics
Niusha Mouchani, Amin Yourdkhani, Reza Poursalehi
Summary: Zr-doped hematite thin films were prepared using a liquid phase deposition method and their PEC properties were enhanced by flame treatment. The flame treatment increased the photocurrent density and activated the donor doping through the formation of oxygen vacancies. The study suggests that butane reduced flame treatment is an effective method to improve the PEC properties of hematite thin films.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Chemistry, Physical
Akhil Tayal, S. M. Amir, Sabine Puetter, S. Mattauch, Mukul Gupta, Seema
Summary: The growth behavior, structural, electronic, and magnetic properties of Co-N thin films deposited using direct current (dc) and high power impulse magnetron sputtering (HiPIMS) processes were studied. The HiPIMS process resulted in superior crystallite size, surface morphology, and stabilization of fcc-Co and Co4N phase compared to the dcMS process. Although films grown by dcMS or HiPIMS processes showed similar saturation magnetization, they differed in terms of magnetic anisotropy due to variations in the growth mechanisms affecting the local structure of the Co4N phase.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Environmental
Jingyu Sun, Shudi Mo, Ze Zhang, Jinghong Wen, Donggang Guo, Yaohua Li, Lu Liu
Summary: In this study, two-dimensional BiOBr nanomaterials with oxygen-rich and oxygen-poor vacancies were designed and their photocatalytic activities were investigated. It was found that the oxygen-rich BiOBr exhibited higher antibacterial activity under NIR light irradiation due to its optimized electronic structure, which resulted in stronger interactions with bacteria, higher absorption capacity to NIR light, and longer photocarrier lifetime. The DFT calculations also showed that the oxygen-rich BiOBr had better O2 adsorption, leading to the generation of more reactive oxygen species for superior activity.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Materials Science, Multidisciplinary
Kriti, Surbhi Chalotra, Puneet Kaur, Simranpreet Kaur, Asokan Kandasami, Parminder Kaur, D. P. Singh
Summary: This paper investigates the structural and optical properties of WO2.72 thin films implanted with 150 keV Ni ions at ion fluences ranging from 1015 to 1016 ions/cm2. The structural analysis reveals the formation of a crystalline monoclinic phase in the pristine films, but ion implantation leads to a degradation in crystalline quality and complete amorphization at higher ion fluences. Additionally, the bandgap decreases due to the band tailing effect caused by ion implantation. Optical investigation demonstrates the presence of near ultraviolet (NUV), band-to-band transition, and blue-green emission bands in the WO2.72 thin films. Ni doping through implantation causes a blue shift in the NUV emission peaks, attributed to an increase in free electron concentration in the conduction band. The overall color of the emitted light transitions from light blue to deep blue upon Ni implantation, as demonstrated by the Commission International de l'Eclairage (CIE) diagram.
Article
Physics, Applied
Sheng Cheng, Lvkang Shen, Shaodong Cheng, Chunrui Ma, Ming Liu, Tao Zhu
Summary: This work investigates the resistive switching and electrical-control of magnetization in Pt/CoFe2O4/Nb:SrTiO3 heterostructures. The films exhibit a classic bipolar resistive switching effect and good anti-fatigue performance. The study reveals that the interfacial migration of oxygen vacancies plays an important role in modulating the resistive and magnetic properties in CoFe2O4 resistive switching devices.
APPLIED PHYSICS LETTERS
(2022)
Article
Chemistry, Physical
Stephan Glamsch, Helmut Karl
Summary: Hydrogenated titanium dioxide (TiO2:H) thin films with thicknesses ranging from 33 to 300 nm were grown using reactive radio-frequency magnetron sputter deposition. The electrical resistivity, Seebeck coefficient, and optical absorption coefficient of these films were characterized. However, heating to temperatures above 430 K resulted in irreversible property changes, which depended on the atmosphere during thermal treatment.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Mingkai Tang, Liyufen Dai, Mingqiang Cheng, Yuan Zhang, Yanghe Wang, Xiangli Zhong, Jinbin Wang, Feng An, Ming Ma, Mingqiang Huang, Changjian Li, Jiangyu Li, Gaokuo Zhong
Summary: This article proposes a synthesis strategy based on high-throughput pulsed laser deposition technology to precisely control the thickness of oxide thin films. With this method, STO thin films with different thicknesses were successfully synthesized, and a transition from unipolar to bipolar resistive switching mode was observed as the film thickness increased. The STO thin film with a thickness of 20.3 nm exhibited excellent conductance modulation properties under the application of electrical pulses as well as significant reliability for emulating various synaptic functions, making it a promising material for artificial neuromorphic computing applications.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Materials Science, Ceramics
Faisal Alresheedi
Summary: Resistive random-access memories are attractive for next-generation non-volatile memories due to their simple structure, fast response, and low power consumption. This study fabricated one-dimensional TiO2 nanorods and evaluated their resistive switching characteristics. The nanocomposite device with embedded SnO2 nanoparticles exhibited superior switching performance and additional features of multilevel data storage.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Multidisciplinary
Huizhou Zhong, Guoping Gao, Xuening Wang, Hengyi Wu, Shaohua Shen, Wenbin Zuo, Guangxu Cai, Guo Wei, Ying Shi, Dejun Fu, Changzhong Jiang, Lin-Wang Wang, Feng Ren
Summary: Utilizing ion irradiation technology, a nanosheet structured NiO/NiFe2O4 heterostructure with rich oxygen vacancies was achieved, leading to enhanced catalytic performance in both oxygen evolution reaction (OER) and hydrogen evolution reaction.
