Article
Materials Science, Coatings & Films
A. R. Shugurov, E. D. Kuzminov
Summary: The mechanical properties, adhesion, and wear resistance of Ti0.41Al0.48Ta0.11N monolithic coating and Ti0.41Al0.48Ta0.11N/Ti0.45Al0.55 and Ti0.41Al0.48Ta0.11N/Ta multilayers were investigated. The multilayer coatings showed lower mechanical properties but stronger adhesion and improved wear resistance.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Chemistry, Physical
Valentina Zin, Francesco Montagner, Silvia Maria Deambrosis, Cecilia Mortalo, Lucio Litti, Moreno Meneghetti, Enrico Miorin
Summary: This article describes the depositions and functional characterizations of Ta-N and Ta-Al-N coatings grown by reactive high-power impulse magnetron sputtering onto silicon substrates for protection purposes. The effects of changing substrate polarization voltage and adding Al to form a ternary system on the mechanical and tribological properties of the coatings have been investigated. Micro-Raman characterization reveals different wear mechanisms between Ta-N and Ta-Al-N films, with Ta-N coatings undergoing plastic deformation and Ta-Al-N films suffering higher oxidation phenomena.
Article
Biochemistry & Molecular Biology
Shuhong Xu, Linfeng Tan, Fan Liu, Yiping Cui, Chunlei Wang, Rong Zhang
Summary: The study investigated the optical properties of N- and F-doped triangular-shaped carbon molecules and found that the presence of impurity N in benzene ring structures significantly altered the absorption spectra compared to pure carbon molecules. However, if the impurity did not affect the distribution of electrons in all benzene rings, the optical properties of carbon molecules remained unchanged regardless of N or F doping.
JOURNAL OF MOLECULAR MODELING
(2021)
Article
Chemistry, Inorganic & Nuclear
Megumi Mukoyoshi, Mitsuhiko Maesato, Shogo Kawaguchi, Yoshiki Kubota, Keigo Cho, Yasutaka Kitagawa, Hiroshi Kitagawa
Summary: Mixed-metal metal-organic frameworks (MOFs) have significant importance in magnetic materials research. The magnetic properties of CoxNi1-x-MOF-74 were systematically studied, showing different behaviors with varying compositions of cobalt and nickel. The magnetic interaction of CoxNi1-x-MOF-74 can be altered by the adsorption of C2H4.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Physical
Qin Wang, Jiamian Huang, Chenyang Wang, Pengfei Luo, Zhili Li, Rongtao Liu, Qunaying Ma, Jun Luo
Summary: In this study, an effective method to reduce the lattice thermal conductivity of NbCoSn-based half-Heusler alloys through isoelectronic substitution of Ta for Nb has been demonstrated, leading to improved thermoelectric performance by about 32% compared to the matrix material.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Polymer Science
Eun Chae Kim, Myung-Jin Kim, Linh Nguyet Thi Ho, Woohwa Lee, Jae-Won Ka, Dong-Gyun Kim, Tae Joo Shin, Kang Moo Huh, Sungmin Park, Yong Seok Kim
Summary: The synthesis and systematic investigation of vinyl-addition polynorbornene copolymers with pendant n-alkyl chains were reported, with high transmittance films successfully prepared by a solution-casting method. The mechanical properties of the films can be controlled by tuning the length and content of the alkyl chain.
Article
Optics
Jie Deng, Haofei Huang, Ke Tang, Shilin Wang, Mengqian Wang, Zun Liu, Keyun Gu, Yi Shang, Linjun Wang, Jian Huang
Summary: In this study, Ta-doped Ga(2)O(3) films were prepared and the effects of seed layer thickness on the microstructure, morphology, optical, and electrical properties of the films were investigated. The results showed that seed layers with the appropriate thickness (around 20 nm) improved the crystalline quality and electrical properties of the Ta-doped Ga(2)O(3) films.
Article
Chemistry, Physical
Magdalena Kedzierska, Katarzyna Sala, Magdalena Bankosz, Dominika Wroniak, Pawel Gajda, Piotr Potemski, Bozena Tyliszczak
Summary: Hydrogel materials with antioxidant properties were developed through UV radiation and incorporated with wild rose extract for wound dressing. The amount of photoinitiator used affected the physicochemical properties and surface morphology of the obtained materials. The materials showed high absorbency for wound exudates, making them suitable for biomedical applications.
Article
Physics, Applied
Firat Angay, Sophie Camelio, Dominique Eyidi, Baerbel Krause, Gregory Abadias
Summary: The influence of Al content on the structural, electrical, and optical properties of polycrystalline ternary Ta-Al-N thin films was investigated. Increasing Al content led to a more columnar microstructure, changes in chemical bonding state and crystal structure, and significant alterations in electrical and optical properties. Ternary Ta1-xAlxNy alloys with low Al content showed superior electrical and optical conductivities compared to binary TaN compound, making them promising candidates for UV plasmonic applications.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Chemistry, Physical
Yanli Wang, Qianyun Tan, Bo Huang
Summary: A novel N/Ta-co-doped TiO2 coating (TOTaN) was developed on Ti through sol-gel method to solve the corrosion and passivation of metal bipolar plates. The TOTaN coating enhanced the conductivity of TiO2 and showed excellent corrosion protection in a simulated cathode environment.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Jie Tang, Ying Liu, Jin-Wen Ye, Zhi-Nan Cao, Shi-Qing Ma, Xiao-Jiao Yang
Summary: The study investigated the effects of (Cr,Mo,Ta)(2)(C,N) as a novel inhibitor on the microstructure and mechanical properties of cemented carbides, showing significant improvement in comprehensive mechanical properties, especially hardness and transverse rupture strength. The (Cr,Mo,Ta)(2)(C,N) solid-solution powders provided better inhibition performance, leading to better fracture resistance in cemented carbides.
Article
Physics, Condensed Matter
Xiangjiang Xiao, Jielei Tu, Zuming Liu, Jiahao Wu, Lei Liu
Summary: The structural and photoelectric properties of (Nb, Ta) codoped anatase TiO2 were investigated using first-principles calculations based on density functional theory and the Hubbard U correction. The results showed that the (Nb, Ta) codoping induced hybridized states, resulting in the n-type metallic characteristics and increased conductivity of Ti-0.Nb-875(0).0625Ta0.0625O2(I) compared to Ti-0.Nb-9375(0).O-0625(2). The distance between Nb and Ta atoms and the Nb doping concentration were found to affect the conductivity and mobility of the material. Additionally, (Nb, Ta) codoped anatase TiO2 exhibited shifts in the absorption edges towards the ultraviolet region and high transmittance due to its low absorption and reflection of visible light.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Chemistry, Multidisciplinary
J. Mor, Anil Boda, S. K. Sharma, Musharaf Ali, Arijit Sengupta
Summary: Metal-organic frameworks (MOFs) are a class of compounds with diverse structural topologies, porosity, and modularity, which are of significant technological importance. ZIF-67 has been synthesized to efficiently extract ions in different oxidation states from aqueous solutions, with sorption efficiency influenced by their chemical potential. The sorption process follows pseudo 2nd order rate kinetics, and is spontaneous and endothermic. The binding energy predicted by Density Functional Theory (DFT) aligns with the experimental selectivity of ions, demonstrating the interaction between ZIF-67 and ions.
SEPARATION SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Physical
Huimin Guo, Xiaolin Ma, Zhiwen Lei, Yang Qiu, Jianzhang Zhao, Bernhard Dick
Summary: Extensive density functional theory (DFT) and time-dependent density functional theory (TD-DFT) calculations were used to investigate the electronic structure and photophysical properties of a series of N-methyl and N-acetyl substituted alloxazines (AZs). It was found that non-radiative decays dominate over radiative decays from the excited states of these AZs, and functional group substitution can perturb the electronic structure and enhance intersystem crossing with the pi pi* states. Substitution at different positions within the alloxazine framework may lead to AZs with different photophysical properties.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Materials Science, Ceramics
Kai Zang, Xiping He, Wenping Liang, Qiang Miao, Yuanyuan Sun, Haiyang Yu, Mengjuan Yin, Xiguang Gao, Yingdong Song
Summary: Hf-Ta-N coatings were prepared using double glow plasma alloying technology at different Ar/N2 ratios. The nitride content on the surface is not positively correlated with the nitrogen ratio. The Hf-Ta-N coatings can be divided into two parts, the outer Hf-Ta-N deposited layer and the inner Hf, Ta and Ti diffusion layer. XRD results reveal that peaks shift due to solid solution doping. The hardness and elastic modulus increase first and then decrease with the rise of nitrogen flow rate, which is consistent with the nitride content on the surface. The Hf-Ta-N coating prepared under the 1:1 Ar/N2 ratio has the best wear resistance due to its excellent mechanical property, while the coating prepared under the 3:1 Ar/N2 ratio wears out during the friction test due to poor mechanical property.
CERAMICS INTERNATIONAL
(2023)
