Article
Chemistry, Inorganic & Nuclear
Sana Khan, S. M. Azhar, M. D. Shirsat, S. S. Hussaini, I. M. Ashraf, Mohd Anis
Summary: The novel investigation focuses on the mono crystal growth of pristine and glycine doped copper sulfate using the slow solvent evaporation method. Various techniques including X-ray diffraction, energy dispersive spectroscopy, UV-visible spectroscopy, Z-scan technique, dielectric studies, and etching analysis were employed to analyze the structural, chemical, optical, nonlinear optical, surface damage tolerance, and dielectric properties of the crystals.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Chemistry, Inorganic & Nuclear
Yan Luo, Yin-Qiang Zhang, Guan-Cheng Xu
Summary: In this study, a new displacement-type metal-free organic-inorganic hybrid phase transition material was successfully synthesized and its phase transition mechanism and structural changes were analyzed using single-crystal X-ray diffraction.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Makoto Minohara, Yuka Dobashi, Naoto Kikuchi, Seiya Suzuki, Akane Samizo, Takashi Honda, Keishi Nishio, Yoshihiro Aiura
Summary: Based on computational approaches, p-type oxide semiconductors with lone-pair ns(2) have been developed by modulating the valence band maximum of oxides. However, the control of hole density has been a challenge due to the poor chemical stability of Sn2+ and the formation of oxygen vacancies. This study demonstrates the control of hole density in polycrystalline Bi2WO6 through chemical doping and provides insights into the development of practical p-type oxide semiconductors.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Physical
K. Venkatesan, M. Kayalvizhi, L. Jothi, G. Vasuki
Summary: An organic nonlinear optical material, 2-Amino-4-methylpyridinium 2-chloro 4-nitro benzoate (AMPCNB), has been synthesized and large size single crystals have been grown. The crystal structure and optical properties of the compound have been investigated, showing its potential application in devices.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Chemistry, Physical
Woo-Jin Choi, Daejin Yang, Sang-Chae Jeon, Kyoung-Seok Moon
Summary: The effect of MnCO3 additions on crystal structure, grain growth behavior, and dielectric properties were investigated in the La2O3-doped BaTiO3 system. The results showed that the tetragonality and grain shape of the samples were significantly influenced by the amount of MnCO3 added. The grain growth behavior changed from suppressed growth to abnormal growth and finally normal growth with increasing amounts of MnCO3.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
V Thayanithi, P. Praveen Kumar
Summary: A novel nonlinear optical crystal NPT was developed using unidirectional crystal growth technique; NPT crystals showed superior optical transmittance, photoluminescence, and dielectric properties compared to conventionally grown crystals.
Article
Chemistry, Inorganic & Nuclear
Yin-Qiang Zhang, Min Li, Guan-Cheng Xu
Summary: A new organic-inorganic hybrid compound has been successfully synthesized, showing a structural phase transition at Tc=188.9 K, driven by order-disorder changes of n-propylammonium cations. A gentle dielectric anomaly was discovered near Tc. This research will be valuable in exploring new In-based phase transition materials.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2021)
Article
Materials Science, Multidisciplinary
P. Shenbagarajan, P. Jayaprakash, S. Krishnan, S. Selvaraj, T. C. Sabari Girisun
Summary: Solvent evaporation was used to successfully develop a nonlinear optical single crystal DNBLVLN. The crystal was confirmed to have an orthorhombic structure and noncentro symmetric P1 space group. FTIR and NMR studies showed the presence of different functional groups in DNBLVLN. The crystal's optical properties were confirmed through UV-visible spectrum. The crystal exhibited positive photo current and fluorescence emission at a wavelength of 492 nm. The crystal's dielectric property, second harmonic generation, and third harmonic generation were also investigated. Nonlinearity coefficient was determined to be 0.7 x 10-11 m/W through Z-scan approach.
Article
Materials Science, Multidisciplinary
M. V. Talanov, A. A. Pavelko, L. S. Kamzina
Summary: Cadmium niobate Cd2Nb2O7 is a rare example of a bulk ferroelectric with a pyrochlore structure, exhibiting complex phase diagram and contradictions in structural phase transitions and polar states. Studies show that its dielectric behavior demonstrates typical features of domain-wall freezing dynamics, expanding the limited family of ferroelectrics exhibiting this phenomenon.
MATERIALS RESEARCH BULLETIN
(2022)
Article
Materials Science, Multidisciplinary
B. Srimathy, J. Kumar
Summary: Rare-earth Nd-doped lead zinc niobate-lead titanate (Nd:PZN-PT) and W-doped lead zinc niobate-lead titanate (W:PZN-PT) single crystals were grown by self-flux technique, with pure perovskite phases observed. The doped crystals showed enhanced relaxor behavior, as evidenced by diffuse phase transitions and frequency dispersive phenomena in the dielectric peaks. Additionally, doping had a significant impact on the dielectric constant, AC conductivity, and piezoelectric properties of the crystals, with a simple domain switching mechanism observed in the hysteresis behavior.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Chemistry, Physical
Zhongfen An, Wenhao Yu, Juan Zhang, Lingcui Zhang, Jinbo Zhao, Jian Wei, Xiaoning Wang, Ripeng Xu, Peixin Hou, Jia Zhao, Feng Shi
Summary: Mg3(VO4)2 ceramics were fabricated using solid-state sintering method at different temperatures. The effects of sintering temperature on its phase evolution, crystal structure, dielectric response, and lattice vibrational characteristics were investigated. The sample sintered at 1050 degrees Celsius exhibited the best dielectric properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Polymer Science
Ghulam Hassnain Jaffari, Hurriyat Arooj, Musa Mutlu Can, Nawazish Ali Khan
Summary: Poly(vinylidene fluoride) (PVDF) based polymers were investigated as potential dielectric candidates for polymer film capacitors. The structural and electrical responses of PVDF homopolymer and P(VDF-CTFE) copolymers were studied, including the effects of processing conditions and CTFE content. Temperature-dependent dielectric measurements revealed dielectric relaxation near the glass transition temperature and quantified activation energies. The study also observed interface polarization and lossy capacitor behavior in the high temperature regime. The polarization versus electric field loops of PVDF and P(VDF-CTFE) copolymers were measured at different frequencies, and polarization values were compared based on local dipole moments.
POLYMER INTERNATIONAL
(2022)
Article
Chemistry, Inorganic & Nuclear
Yong Guo, Junlang Tan, Jingchang Zhao
Summary: NaF was composited into CCTO with excess Ti to prepare NaF/CCTO composite ceramics, and its physical and chemical properties were characterized. HRTEM revealed particle deposition on CCTO surface. FESEM showed the presence of nanocrystalline structures inside the grains in NaF/CCTO composite ceramics. Dielectric spectroscopy confirmed the significant improvement of CCTO's dielectric properties by NaF and excessive Ti. The dielectric constant of NaF-0.1 sample reached 2.7 x 106 and 5.1 x 105 at 20 Hz and 1 kHz, respectively.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Hong Gao, Tie Zhang, Meng-Meng Lun, Jun-Yi Li, Hai-Feng Lu, Da-Wei Fu, Yi Zhang
Summary: This study presents a halogen regulation design of organic molecular strategy to enhance the multifunctional properties of organic-inorganic hybrid phase transition materials. The results show improved SHG response and dielectric phase transition temperature, as well as efficient green light emission under UV irradiation. This work is significant for exploring multifunctional molecular switch materials through halogen modification strategies.
CHEMISTRY-AN ASIAN JOURNAL
(2022)
Article
Optics
M. I. Baig, Mohd Anis, M. D. Shirsat, A. M. Alshehri, H. H. Somaily, S. S. Hussaini
Summary: Pure KH2PO4 and zinc-doped KH2PO4 crystals were grown using a slow evaporation solution technique, with their structural details and optical properties analyzed through various methods. The study showed that the Zn-KDP crystal exhibited enhanced SHG efficiency and third order nonlinear optical parameters compared to KDP, with its laser damage threshold and dielectric response also investigated.
Article
Chemistry, Physical
J. Zamora, T. Bautista, N. S. Portillo-Velez, A. Reyes-Montero, H. Pfeiffer, F. Sanchez-Ochoa, H. A. Lara-Garcia
Summary: Experimental and DFT studies were conducted on the structural, magnetic, and optical properties of RFeO3 perovskites. The perovskites exhibited an orthorhombic crystal structure and weak ferromagnetic behavior. They were confirmed to be semiconductors with a bandgap of approximately 2.1 eV.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xianxiang Lv, Jing Jin, Weiguang Yang
Summary: By depositing TiN and TiO2 surface layers on AlSi films, the electrochemical performance of silicon-based anodes can be significantly improved, suppressing volume expansion and promoting the formation of a stable SEI layer.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Sharafat Ali, Haider Ali, Syedul Hasnain Bakhtiar, Sajjad Ali, Muhammad Zahid, Ahmed Ismail, Pir Muhammad Ismail, Amir Zada, Imran Khan, Huahai Shen, Rizwan Ullah, Habib Khan, Mohamed Bououdina, Xiaoqiang Wu, Fazal Raziq, Liang Qiao
Summary: The construction and optimization of redox-heterojunctions using a bifunctional phosphate as an electron-bridge demonstrated significant improvements in photo catalytic activity, including enhanced dispersion, reduced interfacial migration resistance, and increased abundance of active-sites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ren-Ni Luan, Na Xu, Chao-Ran Li, Zhi-Jie Zhang, Yu-Sheng Zhang, Jun Nan, Shu-Tao Wang, Yong-Ming Chai, Bin Dong
Summary: Extensive research has revealed that oxygen evolution reaction (OER) in alkaline conditions involves dynamic surface restructuring. The development and design of sulfide/oxide pre-catalysts can reasonably adjust the composition and structure after surface reconstruction, which is crucial for OER. This study utilized a simple two-step hydrothermal method to achieve in situ S leaching and doping, inducing the composition change and structure reconstruction of CoFe oxides. The transformed FeOOH and CoOOH exhibited excellent OER activity and could be easily mass-produced using low-cost iron based materials and simple methods.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jun'an Lai, Daofu Wu, Peng He, Kang An, Yijia Wang, Peng Feng, WeiWei Chen, Zixian Wang, Linfeng Guo, Xiaosheng Tang
Summary: Zero-dimensional organic-inorganic metal halides (OMHs) are gaining attention in the fabrication of light-emitting diodes due to their broad emission band and high photoluminescence quantum yield. This work synthesized a zero-dimensional organic tetraphenylphosphonium bismuth chloride (TBC) that showed efficient blue light emission, with the emission mechanism attributed to the transition of Bi3+ ions. White light-emitting diodes (WLEDs) were fabricated using TBC, along with green-emitting and red-emitting single crystals, achieving single-component white emissions. These findings demonstrate the different emission mechanism of ns2 ions-based OMHs and highlight the potential of bismuth-based OMHs in WLEDs applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xuewei Liang, Yunhai Su, Taisen Yang, Zhiyong Dai, Yingdi Wang, Xingping Yong
Summary: The revolutionary design concept of high-entropy alloys has brought new opportunities and challenges to the development of advanced metal materials. In this work, AlCrCuFe2NiTix high-entropy flux cored wires were prepared by combining the design idea of a high-entropy alloy with the characteristics of flux cored wire. AlCr-CuFe2NiTix high-entropy surfacing alloys were prepared using gas metal arc welding technology. The wear properties of the alloys were analyzed, and the phase composition, microstructure, strengthening mechanism, and wear mechanism were discussed. The results show that the alloys exhibit a dendritic microstructure with BCC/B2 + FCC phases. Increasing Ti content leads to the precipitation of Laves phase. The alloys show improved microhardness and wear resistance due to the precipitation of coherent B2 and Laves phases. However, excessive Ti addition results in the increase of Laves phase and reduced wear resistance of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
M. Vadivel, M. Senthil Pandian, P. Ramasamy, Qiang Jing, Bo Liu
Summary: This work presents the enhanced photocatalytic and electrochemical performance of g-C3N4 assisted PAA on CoFe2O4 ternary nanocomposites. The incorporation of PAA and g-C3N4 improves the separation efficiency of photogenerated charge carriers, resulting in superior photocatalytic degradation and high specific capacitance values.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Vibhu T. Sivanandan, Ramany Revathy, Arun S. Prasad
Summary: In this study, pure and doped cobalt ferrite nanoparticles were prepared using the sol-gel auto-combustion method with the aid of lemon juice as eco-fuel. The crystal structure, lattice parameter, crystallite size, microstrain, optical parameters, and room temperature magnetic properties of the samples were analyzed. The effect of doping on the magnetic properties was also investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qing Guo, Bowen Zhang, Benzhe Sun, Yang Qi
Summary: This study prepared ZnO films with various nonpolar preferred orientations using conventional chemical bath deposition method and characterized their growth process and mechanism. It was found that the type and concentration of nitrate could control the preferred orientation and surface roughness of ZnO films. Additionally, ZnO films with different preferred orientations exhibited different optical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Chong Zhang, Yan Liu, Zhaoyan Wang, Hang Yang
Summary: In this study, six bimetallic FeCo particles were synthesized via the hydrothermal method at different Fe:Co ratios. The Fe:Co ratio not only modulates the composition of the particles but also influences their structure and magnetic properties. The FeCo alloys showed a transformation from an Fe-based structure to a Co-based structure with increasing Co content. The Fe:Co ratio of 1:1 and 3:1 resulted in particles with the highest and lowest saturation magnetization, respectively.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jianning Zhang, Jing Li, Yiren Wang, Xiaodong Mao, Yong Jiang
Summary: We conducted a study on the formation of ultra-fine Y-Ti-Ta-O nano-oxides in Ta+B micro-alloyed 13CrWTi-ODS alloys using electron microscopy and first-principles calculations. The Y-Ti-Ta-O nano-oxides were found to be mainly Y2(Ti,Ta)2O7, with an average size of 7 nm and a number density of 6.8 x 1023 m-3. Excess boron was found to enhance the adhesion of some low-sigma grain boundaries but weaken the Fe/Y2Ti2O7 interface, while excess tantalum enhanced the Fe/Y2Ti2O7 interface but caused serious degradation of grain boundaries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Yirong Fang, Pei Cheng, Hang Yuan, Hao Zhao, Lishu Zhang
Summary: A new composite system of nitrogen-doped reduced graphene oxide and black phosphorus quantum dots has been developed for tumor therapy, showing improved electrochemical properties and stability. The system generates hydrogen peroxide and hydroxyl radical to effectively kill tumor cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xiufang Qin, Yuanli Ma, Hui Zhang, Ting Zhang, Fang Wang, Xiaohong Xu
Summary: The structure and magnetism of cobalt ferrites after Mn2+-Tb3+ co-doping were studied. Co-doped samples exhibited cubic spinel structure and spherical shape of ferrite nanoparticles. The redistribution of Co2+ and Fe3+ ions between octahedral and tetrahedral sites was observed due to Mn2+-Tb3+ co-doping. The coercivity and magnetization saturation of co-doped samples were significantly improved, leading to a maximum energy product that is 190% higher than that of the un-doped sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ho Yeon Lee, Wonjong Yu, Yoon Ho Lee
Summary: Recently, there has been an increasing interest in developing ultra-fine nanostructured electrodes with extensive reaction areas to enhance the performance and low-temperature operation of solid oxide fuel cells. The use of a refined approach involving co-sputtering metal alloys and oxide targets has demonstrated the feasibility of nano-columnar structures in perovskite-based electrodes, expanding the temperature range of thin film electrodes. This study systematically examines the effects of chamber pressure control in the co-sputtering process and identifies the intricate relationship between sputtering pressure and film structure. By fine-tuning the columnar growth in the electrode, significant improvements in performance and thermo-mechanical properties were achieved, resulting in high-performance all-sputtered solid oxide fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qianyun Bai, Xiaoxiao Yan, Da Liu, Kang Xiang, Xin Tu, Yanhui Guo, Renbing Wu
Summary: This study proposes a simple method to develop a non-precious transition metal-based electrocatalyst with high catalytic activity and robustness for the hydrogen evolution reaction. The as-synthesized electrode exhibits a low overpotential and high current density, indicating its potential in energy conversion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)