Article
Immunology
Yong Jun Park, Deokyeon Lee, Kwang-Mo Kang, Sumin Choi, Minkyung Shin, Seung Ho Han, Il Heo, Ho Seong Jang, Yoon-Chae Nah, Dong Hun Kim
Summary: This article investigates the properties of Ag nanoparticle-incorporated electrochromic WO3 thin films. The films with higher Ag concentration showed merged particles and a single or polycrystalline phase, while films with lower Ag concentration had a random distribution of small nanoparticles. Surface plasmon resonance peaks in the absorption spectra confirmed the formation of metallic nanoparticles. The W0.91Ag0.09O3-delta thin film exhibited faster switching time, higher coloration efficiency, and black coloration, indicating the achievement of color neutrality through Ag nanoparticle incorporation.
INTERNATIONAL IMMUNOPHARMACOLOGY
(2023)
Article
Chemistry, Analytical
Elena Colusso, Michele Rigon, Alain Jody Corso, Maria Guglielmina Pelizzo, Alessandro Martucci
Summary: Tungsten oxide thin films with different properties were prepared and coated with gold nanoparticles for optical sensing of hydrogen. The films' structural, morphological and optical properties were characterized using various techniques. The films showed good response to hydrogen with high selectivity among other reducing gases. The sensitivity was found to be dependent on the film thickness and crystallinity.
Article
Physics, Applied
Jeremy Fleury, Luc Burnier, Andreas Schueler
Summary: This study investigates the optical and electronic properties of nanoporous amorphous molybdenum-doped tungsten trioxide thin films and demonstrates their potential for color neutral and spectral transmission control in electrochromic devices.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Renee J. Saenz-Hernandez, Guillermo M. Herrera-Perez, Jesus S. Uribe-Chavira, Maria C. Grijalva-Castillo, Jose Trinidad Elizalde-Galindo, Jose A. Matutes-Aquino
Summary: By adjusting the thickness of WO3 films, the concentration of oxygen vacancies can be modulated, which has a significant influence on the applications of these semiconductor materials. Additionally, the thickness of the film affects the structure, roughness, and surface area of the film.
Article
Materials Science, Multidisciplinary
A. Shirpay, M. M. Bagheri Mohagheghi
Summary: WO3-TeO2 binary thin films were deposited by spray pyrolysis and characterized to study their electrochromic and coloration properties. Increasing TeO2 content after annealing led to the formation of the H2Te2O6 phase, improving electron-hole exchange and the coloration/bleaching process. The results show variations in hysteresis curve area and diffusion coefficient in response to the changes in TeO2 content.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Hiroaki Uchiyama, Yoshiki Nakamura, Seishirou Igarashi
Summary: The study focused on the preparation of M-doped WO3 (M = Sn or In) films via evaporation-driven deposition during low-speed dip coating, with Sn- and In-doping easily achieved by controlling the chemical composition. The crystallinity of the films varied with heating temperature, affecting the electrochromic response and stability, with In-WO3 films showing faster color change and good cycle stability in the visible wavelength region compared to WO3 or Sn-WO3 films.
Article
Chemistry, Multidisciplinary
Pangihutan Gultom, Jiang-Yan Chiang, Tzu-Tai Huang, Jung-Chuan Lee, Shu-Hsuan Su, Jung-Chung Andrew Huang
Summary: Tungsten disulfide (WS2) was prepared in different layers (monolayer, bilayer, six-layer, and nine-layer) by ion beam sputtering and sulfurization using W metal and WO3. The crystallinity of WS2 improved with increasing sulfurization temperature, and WS2 sulfurized from WO3 showed better crystallinity than WS2 sulfurized from W-metal. High-quality monocrystalline WS2 thin films were successfully prepared at wafer scale by sulfurization of WO3. WS2 monolayer exhibited enhanced photoluminescence and high transmittance of over 80% with a band gap of 1.9 eV.
Article
Materials Science, Multidisciplinary
J. Potocnik, M. Popovic, M. Mitric, Z. Rakocevic
Summary: The deposition angle has a significant influence on the porosity, crystallinity, surface roughness, as well as the optical and electrical properties of nickel thin films. Variations in refractive index, extinction coefficient, and resistivity were observed with different deposition angles, which can be correlated with changes in microstructure and porosity of the films.
Article
Materials Science, Multidisciplinary
M. Osiac, V. Satulu, M. Jigau, I. Tirca, I. R. Tudorascu
Summary: The crystalline structure and optical properties of pure tungsten oxide WO3 and Fe-doped WO3 thin films deposited on sapphire substrates were investigated. The X-ray diffraction analysis showed that the thin films exhibited different crystal phases depending on the substrate temperature. The presence of Fe in the deposited layer influenced the film structure and reduced the optical bandgap of the 4% Fe-doped WO3 thin film.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Engineering, Electrical & Electronic
Nisha, Palash Kumar Basu
Summary: This work provides a detailed study on the gasochromic properties of tungsten oxide at different operating conditions, sol and doping concentrations. The hydrogen sensing results are compared with material characterization to gain more insight into the gasochromic performance. The effect of noble metal doping on the gasochromic behavior is also explored, and Pt-doped samples show better response than Pd-doped ones.
IEEE SENSORS JOURNAL
(2023)
Article
Materials Science, Ceramics
Ce Li, Xu Zhang, V. C. Onah, Weiling Yang, Zhuang Leng, Kexuan Han, Fangming Zhang, Yong Zhang, Yu Han, Yongtao Li, Huisheng Liu, Hai Lin, Chun Li, Dingfu Zhou, Fanming Zeng
Summary: The formation and structural features of the TeO2-WO3-GdF3 glass system were studied by adjusting the proportions, and the potential application value was determined.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Jiangbin Su, Xiumei Zhu, Longlong Chen, Yu Liu, Hao Qi, Zuming He, Bin Tang
Summary: The authors prepared WO3 thin films on ITO glass substrates at different temperatures and soaked them in different organic solvents. They found that after soaking in ethanol, the optical modulation of WO3 thin films significantly increased, showing excellent electrochromic performance.
ELECTRONIC MATERIALS LETTERS
(2023)
Article
Engineering, Electrical & Electronic
A. F. Qasrawi, Shatha N. Abu Alrub, Rana B. Daragme
Summary: In this study, tungsten oxide thin films with excess oxygen were investigated as optical resonators for gigahertz/terahertz applications. The amorphous WO3 films prepared by thermal evaporation technique exhibited high transparency and showed potential applications in the infrared, visible, and ultraviolet ranges. The wide tunability of these films makes them promising for optical communications.
OPTICAL AND QUANTUM ELECTRONICS
(2022)
Article
Chemistry, Multidisciplinary
V. S. Kavitha, V. Biju, K. G. Gopchandran, R. Praveena, C. K. Jayasankar, Wanichaya Mekprasart, Kanokthip Boonyarattanakalin, Wisanu Pecharapa, V. P. Mahadevan Pillai
Summary: The successful fabrication of Eu3+-doped WO3 thin films with tunable visible emission from blue to bluish red using RFMS technique is reported for the first time. The crystalline nature of the thin films increased up to 3 wt% of the Eu3+ concentration. The doped films show unique emissions of Eu3+ ions and a reduction in band gap energy with an enhancement of the Eu3+ content.
Article
Chemistry, Analytical
Bo Zhang, Jie Luo, Zhi Chen, Lintong Wu, Jianqin Li, Yuanyuan Tian, Shengli Liu
Summary: Nb-doped WO3 films were prepared using a sol-gel dip coating method, and the influence of Nb doping on the microstructure and electrochromic characteristics of the films was investigated. The results showed that Nb doping allowed the films to achieve independent and selective transmittance modulation in the visible and near-infrared bands, and exhibited unique photoelectric conversion behavior.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Physics, Applied
Shengru Chen, Qiao Jin, Shan Lin, Haitao Hong, Ting Cui, Dongke Rong, Guozhu Song, Shanmin Wang, Kuijuan Jin, Qiang Zheng, Er-Jia Guo, Er-Jia Guo
Summary: Transition metal nitrides (TMNs) have fascinating physical properties with potential applications in future devices. Creating freestanding TMN membranes is a challenge due to the incompatible lattice constants with most sacrificial layers. This study presents a general approach using water-soluble BaO sacrificial layer to fabricate TMN membranes, such as CrN, with small lattice mismatch. The integration of TMN membranes with other materials will lead to further studies on emergent phenomena.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Physics, Condensed Matter
Guixin Cao, Yakui Weng, Xinyu Yao, T. Zac Ward, Zheng Gai, David Mandrus, Shuai Dong
Summary: We investigate the magnetic and electronic transport properties of Mn-doped LaTi1-xMn(x)O3(x=0,0.1,0.3,0.5) as a function of temperature and an applied magnetic field. Magnetic transition is observed in the doped samples but not in the parent LaTiO3. Fluctuations in magnetization at low fields below the Neel transition temperature suggest electronic phase separation in the material. The increase in Mn content strengthens the ferromagnetic-like moment while maintaining the G-type antiferromagnetic phase through charge transfer and influence on orbital ordering.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2023)
Article
Chemistry, Multidisciplinary
Andreas Herklotz, Frank Herklotz, Florina Stefania Rus
Summary: We demonstrate the heteroepitaxial growth of phase-pure bronze-phase TiO2 films on MgAl2O4 single-crystal substrates. The bronze films show twinned domains due to their monoclinic structure and are oriented along the in-plane directions of the MgAl2O4 lattice. In addition, TiO2 films are grown on top of MgAl2O4-buffered MgO single crystals to demonstrate a method of stabilizing the bronze phase on a larger variety of substrates.
APPLIED SCIENCES-BASEL
(2023)
Article
Multidisciplinary Sciences
Shuai Xu, Jiesu Wang, Pan Chen, Kuijuan Jin, Cheng Ma, Shiyao Wu, Erjia Guo, Chen Ge, Can Wang, Xiulai Xu, Hongbao Yao, Jingyi Wang, Donggang Xie, Xinyan Wang, Kai Chang, Xuedong Bai, Guozhen Yang
Summary: This paper investigates the magneto-electric coupling in freestanding BiFeO3 using optical second harmonic generation combined with varying magnetic field and temperature. The authors find that the coupling is suppressed by strain releasing but remains robust against thermal fluctuations. Magneto-electric coupling, with the potential to enhance device functionality and reduce energy consumption, has been challenging to probe in unstable and fragile freestanding membranes or two-dimensional materials.
NATURE COMMUNICATIONS
(2023)
Article
Nanoscience & Nanotechnology
Alessandro R. R. Mazza, Elizabeth Skoropata, Jason Lapano, Michael A. A. Chilcote, Cameron Jorgensen, Nan Tang, Zheng Gai, John Singleton, Matthew J. J. Brahlek, Dustin A. A. Gilbert, Thomas Z. Z. Ward
Summary: By designing magnetic frustration in structurally single crystal films, exchange bias and antiferromagnetic spin reversal can be achieved without the need for complex heterostructures and nanocomposites. Through hole doping of high entropy perovskite oxides, magnetic responses can be tuned and highly tunable exchange bias can be created.
Article
Materials Science, Multidisciplinary
Nan Zhao, Jieming Sheng, Jinchen Wang, Han Ge, Tiantian Li, Jiong Yang, Shanmin Wang, Ping Miao, Hua He, Xin Tong, Wei Bao, Er-Jia Guo, Richard Mole, Dehong Yu, Andrey A. Podlesnyak, Liusuo Wu
Summary: In this paper, we investigated the low-temperature magnetic properties of the rare-earth perovskite TbScO3 using magnetization, specific heat, and single crystal neutron scattering measurements. Our results revealed that the magnetic Tb3+ ions have an Ising-like pseudo-doublet ground state and exhibit an antiferromagnetic phase transition at 2.53 K. Furthermore, the dipole-dipole interactions play a crucial role in determining the magnetic ground state, and the system exhibits quasi-one-dimensional magnetism along the c axis.
PHYSICAL REVIEW MATERIALS
(2023)
Article
Chemistry, Inorganic & Nuclear
Adrian Ionut Cadis, Florina Stefania Rus, Joao Nuno Goncalves, Madalina Ivanovici
Summary: This study focuses on the development of a Ca-Bi-O system (CBO) that efficiently degrades Rhodamine B, a highly toxic substance with potential long-term negative consequences in water if not safely removed. The stable phase of Ca2Bi2O5 with a stoichiometric 1:1 molar ratio was created using the conventional precipitation method. Various intermediate products and reaction processes were investigated through X-ray diffraction, Fourier transform infrared, UV-Vis, and Raman spectroscopy. The newly synthesized compound demonstrated promising photocatalytic properties for environmental applications, providing valuable insights for this under-studied yet potentially interesting compound through characterization techniques and first-principles calculations.
Article
Chemistry, Inorganic & Nuclear
Duncan H. Moseley, Rinkle Juneja, Luke L. Daemen, Ilya Sergueev, Rene Steinbruegge, Olaf Leupold, Yongqiang Cheng, Valentino R. Cooper, Lucas Lindsay, Michelle K. Kidder, Michael E. Manley, Raphael P. Hermann
Summary: This study investigates the lattice dynamics and vibrational properties of alpha-Sb2O4 and beta-Sb2O4 compounds. It suggests that the alpha phase is more stable due to nonstoichiometric proportions of Sb-III and Sb-V.
INORGANIC CHEMISTRY
(2023)
Article
Crystallography
Florina Stefania Rus, Joao Nuno Goncalves
Summary: In this study, the structural, electronic, and ferroelectric properties of CaBiO3, ZnBiO3, and MgBiO3 were investigated using first-principles Density Functional Theory (DFT). The results suggest that CaBiO3 may have a large electric polarization and further studies are needed to confirm this prediction. Additionally, ZnBiO3 and MgBiO3 retain favorable ferroelectric and electronic properties under large strains.
Article
Multidisciplinary Sciences
Yuguang Pu, Duncan Moseley, Zhen He, Krishna Chaitanya Pitike, Michael E. Manley, Jiaqiang Yan, Valentino R. Cooper, Valerie Mitchell, Vanessa K. Peterson, Bernt Johannessen, Raphael P. Hermann, Peng Cao
Summary: Researchers have developed a bottom-up method for synthesizing rocksalt high-entropy oxides (HEOs) containing Mn and Fe. They investigated the crystal structure and random cation-site occupancy of FeO-HEO, showing improved structural robustness and the viability of an oxygen sublattice as a buffer layer. Compositional analysis revealed the valence and spin state of the iron species, and the antiferromagnetic order of FeO-HEO below a transition temperature around 218 K was reported, along with predictions for the phase stability conditions of Mn and Fe-containing HEOs.
Article
Materials Science, Multidisciplinary
Lingfei Wang, Wenwen Xu, Xuefeng Zhou, Chao Gu, Hu Cheng, Jian Chen, Liusuo Wu, Jinlong Zhu, Yusheng Zhao, Er-Jia Guo, Shanmin Wang
Summary: We systematically investigated the finite-size effect on the magnetostructural transition in CrN by studying a series of nanoparticle samples prepared through a high-pressure method. We discovered anomalous critical behaviors near the transition, especially for spin correlation length, which can be attributed to the strong spin-lattice coupling in this nitride. Using the Gibbs-Thomson theorem and considering the size-dependent effect, we derived a scaling relationship between the transition temperature and spin correlation length, taking into account the transition-induced volume change. A phenomenological model was also established to understand the kinetics and dynamics of magnetic fluctuation at transition in a finite-size system. Additionally, we found that CrN nanoparticles have a compressed surface shell described by Laplace pressure, following a unique 1/d(1.8) finite-size scaling law.
Article
Materials Science, Multidisciplinary
Zeeshan Ali, Zhen Wang, Alessandro R. Mazza, Mohammad Saghayezhian, Roshan Nepal, Thomas Z. Ward, Yimei Zhu, Jiandi Zhang
Summary: We demonstrate continuous tuning of crystal symmetry from orthorhombic to tetragonal in perovskite ruthenates by substituting strontium with barium. The substitution not only changes the magnetic properties, but also tunes the perpendicular magnetic anisotropy and eliminates RuO6 rotational distortions. Further substitution enhances the tetragonal distortion and suppresses ferromagnetism by controlling the Ru-4d orbital occupancy. These results show that isovalent substitution significantly impacts the electronic and magnetic properties of perovskite oxides.
Article
Physics, Multidisciplinary
Alessandro R. Mazza, Shree Ram Acharya, Patryk Wasik, Jason Lapano, Jiemin Li, Brianna L. Musico, Veerle Keppens, Christopher T. Nelson, Andrew F. May, Matthew Brahlek, Claudio Mazzoli, Jonathan Pelliciari, Valentina Bisogni, Valentino R. Cooper, T. Zac Ward
Summary: Perovskite nickelates exhibit a strong connection between structural, electronic, and magnetic orders. This study investigates the impact of crystal-field disorder induced by cation size variance on the emergence of macroscopic magnetic, structural, and electronic behaviors in high-entropy oxide nickelate films. It is found that the degree of variation in cation sizes strongly affects critical ordering temperatures. Resonant x-ray scattering and density functional theory explain how high-variance systems can manipulate charge disproportionation through local lattice distortions, allowing for the stabilization of room-temperature ordered phases not seen in low-variance ternary compounds.
PHYSICAL REVIEW RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
Cheng Ma, Kuijuan Jin, Chen Ge, Er-Jia Guo, Can Wang, Xiulai Xu
Summary: In this study, a strategy to overcome the limitations of strict fabrication and heavy atoms in achieving strong DMI in 2D magnets is proposed. By absorbing Li atoms on the surface of a 2D magnet, an effective electric field is introduced, resulting in strong DMI. This paves the way for the realization of topological chiral magnetism.
Article
Materials Science, Multidisciplinary
David S. Parker, Li Yin, German D. Samolyuk, Liurukara D. Sanjeewa, Xiaoping Wang, Valentino R. Cooper, Yaohua Liu, Sergey Bud'ko, Athena S. Sefat
Summary: This study presents a detailed theoretical and experimental investigation of vanadium monotelluride VTe. The material exhibits a complex hierarchy of magnetic interactions and energy scales, with an antiferromagnetic ground state and insulating character. The research also explores the effects of off-stoichiometry on energetics and provides a structural explanation for the formation of defect structures in VTe and other NiAs-structure materials.