Article
Chemistry, Multidisciplinary
Medha Dandu, Garima Gupta, Pushkar Dasika, Kenji Watanabe, Takashi Taniguchi, Kausik Majumdar
Summary: This study demonstrates the effects of Moire superlattice on excitons and trions in a twisted bilayer of MoS2. The results show that the optical and electrical properties of the system can be controlled by the moire superlattice, providing additional degrees of freedom such as twist angle.
Article
Chemistry, Multidisciplinary
Dongqing Kong, Tonghui Cai, Haodong Fan, Haoyu Hu, Xiaohui Wang, Yongpeng Cui, Dandan Wang, Yesheng Wang, Han Hu, Mingbo Wu, Qingzhong Xue, Zifeng Yan, Xuejin Li, Lianming Zhao, Wei Xing
Summary: Aluminum ion batteries (AIBs) have potential for energy storage, but current graphite cathode materials are limited. A new type of cathode materials, polycyclic aromatic hydrocarbons (PAHs), specifically anthracene, show high specific capacity and cycle stability, providing a promising option for AIBs.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Engineering, Electrical & Electronic
Han-Yin Liu, Zhen-Yuan Huang
Summary: This study investigates metal-semiconductor-metal ultraviolet (UV) photodetectors based on AlxZn1-xO thin films prepared by mist chemical vapor deposition. The results show that the crystallinity, oxygen vacancy, and energy bandgap of the films are affected by the Al content. The PDs based on Al0.1Zn0.9O, Al0.3Zn0.7O, and Al0.5Zn0.5O exhibit different cutoff wavelengths and maximum responsivity, making them suitable for deep-UV detection.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2022)
Article
Spectroscopy
Yan Zhao, Shiyi Han, Jin Zhang, Lianming Tong
Summary: The research found that the helicity of the E2g1 mode of WS(2) follows or breaks the helicity selection rule under different excitation conditions, which can be attributed to the influences of crystal structure, vibration modes, and exciton-phonon interactions.
JOURNAL OF RAMAN SPECTROSCOPY
(2021)
Article
Chemistry, Physical
Karuppiah Deva Arun Kumar, Paolo Mele, Sergii Golovynskyi, Aslam Khan, Ahmed M. El-Toni, Anees A. Ansari, Ravindra K. Gupta, Hamid Ghaithan, S. AlFaify, Prashantha Murahari
Summary: The study investigates the photoelectrical properties of visible lateral photodetectors based on CdS thin films, with doping shown to affect the shape of grains and improve photocurrent and efficiency.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Spectroscopy
Dmitry Malyshev, Rasmus Oberg, Lars Landstrom, Per Ola Andersson, Tobias Dahlberg, Magnus Andersson
Summary: DPA's Raman and absorption spectra exhibit significant changes with varying pH, and the pKa values were determined experimentally. Fluorescence emission of DPA also shows a shift with pH, indicating the need to consider the different spectral responses from the three ionic forms of DPA in spectral analysis and detection applications.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Materials Science, Multidisciplinary
Samuel J. Garratt, Sthitadhi Roy
Summary: We present a theory for resonances in the many-body localized phase of disordered quantum spin chains, formulated in terms of local observables. A key finding is the existence of universal correlations between the matrix elements of local observables and the many-body level spectrum, revealing the power-law distribution of energy scales associated with resonance. Using these results, we analytically calculate the distributions of local polarizations and eigenstate fidelity susceptibilities, characterizing the proximity of MBL systems to noninteracting ones and the extreme sensitivity to local perturbations. Our theoretical approach considers the effect of varying a local field and numerically corroborate our results using exact diagonalization in finite systems.
Article
Chemistry, Physical
Zongmian Yu, Qilin Wei, Wenchao Lin, Minghui Lu, Tongzhou Li, Hui Peng, Xianci Zhong, Tao Liu, Bingsuo Zou
Summary: In recent years, there has been growing interest in two-dimensional perovskite materials due to their exceptional photoelectric properties. This study successfully synthesized Sb3+-doped 2D cadmium-based organic amine hybrid perovskites and observed a red-shift in the absorption edge and broad-band orange-yellow emission bands. The heterovalent substitution and high electron-phonon coupling coefficients played significant roles in promoting self-trapped exciton formation and related emission.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Materials Science, Ceramics
Jamila S. Alzahrani, Andrei V. Lebedev, Samvel A. Avanesov, Alaa Hammoud, Z. A. Alrowaili, Zakaria M. M. Mahmoud, I. O. Olarinoye, M. S. Al-Buriahi
Summary: In this study, TNB-Tix glasses were synthesized and their physical features, spectra, and shielding performance were investigated. The results showed that an increase in TiO2 content led to improved optical properties and shielding performance, indicating potential applications in optics and shielding.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Electrical & Electronic
V. S. Ganesha Krishna, M. G. Mahesha
Summary: In this study, a UV photodetector based on n-ZnO/p-CuZnS heterojunction was fabricated using spray pyrolysis technique. The device showed good rectifying behavior and increased current under UV illumination. The carrier transport properties were explained using thermionic emission and Chueng models, with a decrease in barrier height observed upon illumination. Raman analysis at low temperature was used to investigate the strain between layers, and photoluminescence study indicated better absorption with suppressed emissions.
SENSORS AND ACTUATORS A-PHYSICAL
(2021)
Article
Chemistry, Physical
G. Montagnac, J. Hao, U. Pedreira-Segade, I. Daniel
Summary: The study focuses on using deep UV resonance Raman setup to track down nucleotide adsorption on selected minerals and discusses the effects of deep UV laser on organic compounds.
APPLIED CLAY SCIENCE
(2021)
Article
Engineering, Electrical & Electronic
Yimeng Li, Peng Chen, Xiufang Chen, Hehe Gong, Xiaobo Hu, Yan Peng, Xiangang Xu, Zili Xie, Xiangqian Xiu, Dunjun Chen, Jiandong Ye, Ping Han, Yi Shi, Rong Zhang, Youdou Zheng
Summary: This study presents a double Schottky barrier junction (SBJ) device for ultraviolet detection. By modulating the gate voltage, the device can operate in both photoconductive and Schottky photodiode modes. The device exhibits high responsivity and gain despite low light intensity, and has a wide UV response range.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
Article
Optics
Ludmila E. Semenova
Summary: Theoretical treatment of resonant hyper-Raman scattering of light by LO phonons in wurtzite semiconductors is provided. The hyper-Raman process involving two-photon transitions to the B and C excitons of the s-type is considered for the scattering geometry y(xxz)x. Different sequences of intermediate virtual states are taken into account. The influence of possible dipole transitions to the deeper valence band on the frequency dependence of the scattering cross section was investigated using a CdS crystal as an example.
Article
Chemistry, Multidisciplinary
Deep Mondal, Susmita Jana, Arka Bandyopadhyay, Debnarayan Jana
Summary: This theoretical work uses the first-principles method to investigate the Raman spectra of tetragonal graphyne quantum dots and explores the occurrence mechanism of Raman active modes. The effects of boron and nitrogen doping on the stability and energy gap of the graphyne structure are also studied, as well as the influence of polarization on the vibrational modes. The findings of this study have significant implications for graphyne-related research.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2022)
Article
Chemistry, Multidisciplinary
Hemanga J. J. Sarmah, D. Mohanta, Abhijit Saha
Summary: We investigated the properties of charge-neutral exciton emission decay, exciton-trion conversion, and their phonon coupling in exfoliated WSe2 nanosheets. The study found prominent emission peaks corresponding to 2s excitons, 1s excitons, and trions, as well as a defect emission peak mediated by chalcogen vacancy. The variation in exciton-phonon and trion-phonon coupling factors have potential significance in nano-photovoltaics, nano-electronics, and heat sinks in nanogenerators.
JOURNAL OF NANOPARTICLE RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Haoyuan Li, Yanlin Huang, Yue Zhang, Xiangyu Zhang, Lianqi Zhao, Wenda Bao, Xincan Cai, Kexin Zhang, Haojie Zhao, Beili Yi, Longxing Su, Anthony K. Cheetham, Shan Jiang, Jin Xie
Summary: A functional layer based on porous organic cages (POCs) is reported, which allows fast and selective ion transport and can sieve specific ions while suppressing undesired reactions, improving the performance of energy storage and conversion devices.
Article
Optics
Longxing Su, Lianqi Zhao, Sheng-Yu Chen, Yingdong Deng, Ruihua Pu, Ziyu Wang, Jin Xie
Summary: In this work, a GaN-based UV photodetector with an asymmetric electrode structure was fabricated using TiN as a transparent contact electrode. The device showed excellent photosensing performance, fast response speeds, and high stability.
Article
Nanoscience & Nanotechnology
Wenda Bao, Yue Zhang, Rongliang Shang, Fufei Cong, Haojie Zhao, Yuqing Zuo, Beili Yi, Jin Xie
Summary: Vapor phase infiltration (VPI) derived from atomic layer deposition (ALD) allows inorganic materials to grow within polymers, showing potential for composite solid polymer electrolytes (CSPEs). However, limited knowledge of VPI synthesis restricts the incorporation of metal oxides, especially binary ones, into polymer matrices. By investigating the VPI method to prepare ZnO-Al2O3 composites in poly(ethylene oxide) (PEO), the introduction order of Al2O3/ZnO (AZO) results in an accumulation of VPI-Al2O3 near the surface of PEO, inhibiting the diffusion of diethyl zinc (DEZ) and weakens the interaction with the polymer matrix. In the incorporation order of ZnO/Al2O3 (ZAO), uniform distribution of VPI-ZnO within PEO is achieved, preserving the interaction between VPI-ZnO and PEO, and inhibiting the growth of lithium dendrites.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Optics
Longxing Su, Qiang Zeng, Ziye Tan, Fangyang LIu, Hongping Ma
Summary: In this study, PbI2 micro-crystals with high purity and crystal quality were successfully synthesized by recycling Pb from waste lead acid batteries. A photodetector based on the recycled PbI2 micro-crystals showed superior performance and relatively rapid response speeds. This innovative and green strategy for producing a UV-visible photodetector from recycled lead acid batteries is significant in environmental protection and the recycling economy.
Article
Materials Science, Multidisciplinary
Peng Wan, Mingming Jiang, Yun Wei, Tong Xu, Yang Liu, Sihao Xia, Longxing Su, Daning Shi, Xiaosheng Fang, Caixia Kan
Summary: This study proposes a near-infrared photodetector based on a Sb2Se3 microbelt/n-GaN heterojunction, which exhibits high responsivity and specific detectivity, as well as a higher anisotropy ratio. The research not only provides insights into the polarization sensitivity regulated by junction or interface, but also offers a practical method for developing high-sensitivity polarization detectors based on high-thickness or bulk anisotropic materials.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Xiaozhang Chen, You Lv, Zhaobo Tian, Jingxi Yang, Yuan Zhu, Longxing Su
Summary: In this study, an artificial synaptic device based on HfO2 nanocrystals was developed using a simple hydrothermal method. The device, which has a metal-insulator-metal (MIM) structure, was fabricated using a ceramic-like preparation technique and a standard electrode preparation method. The device exhibits robust bipolar resistance switching characteristics and simulated synaptic functions of short term plasticity and long term plasticity. The study demonstrates the potential of HfO2 with abundant hafnium vacancies as a prototype material for artificial synaptic devices.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Cong Wu, Hongsheng Shi, Lianqi Zhao, Xin Chen, Xinshui Zhang, Chang Zhang, Jiameng Yu, Yinjie Lv, Ran Wei, Tianyi Gao, Jin Xie, Yi Yu, Wei Liu
Summary: In this study, a self-powered EESD based on niobium tungsten oxide is developed with the use of aqueous Zn2+/Al3+ hybrid electrolyte. The EESD exhibits excellent electrochromic performance and cyclic stability. The effect of different electrolytes on the EESD performance is systematically investigated, providing a simple and effective strategy for the development of aqueous and self-powered EESDs with high optical contrast and good cycle stability.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Weiyi Lin, Wenda Bao, Jun Cai, Xincan Cai, Haojie Zhao, Yue Zhang, Yingdong Deng, Shaoyu Yang, Zeyu Zhou, Zhi Liu, Jin Xie
Summary: Nickel-rich layered cathode materials, considered as promising for high energy lithium-ion batteries, are prone to surface impurity formation, which affects battery performance. Surface coating and doping methods can effectively inhibit impurity formation and improve battery electrochemical performance.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Lei Cao, Pu Yan, Sheng Wen, Wenda Bao, Yilan Jiang, Qing Zhang, Na Yu, Yue Zhang, Kecheng Cao, Pengcheng Dai, Jin Xie
Summary: Researchers constructed h-BN/xIn2O3 composite catalysts through atomic layer deposition (ALD) process and observed that In2O3 nanoparticles (NPs) are dispersed on the edge of h-BN and encapsulated by ultrathin boron oxide (BOx) overlayer after high-temperature treatment. The strong metal oxide-support interaction (SMOSI) effect between In2O3 NPs and h-BN was observed for the first time, which not only improves the interlayer force between h-BN layers and inhibits oxidative cutting of h-BN into fragments at high temperature and water-rich environment. The catalytic stability of h-BN/xIn2O3 has been extended nearly five times and the intrinsic olefin selectivity/productivity of h-BN is well maintained.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Xincan Cai, Zihan Wang, Yurui Xing, Caihong Zheng, Pu Yan, Wenda Bao, Tianye Xie, Yuxiong Hu, Yingdong Deng, Yue Zhang, Yifan Wu, Shaoyu Yang, Fan Zheng, Hongti Zhang, Zhu-Jun Wang, Jin Xie
Summary: This research reveals the formation mechanism of Ni-rich layered oxide through the use of various characterization techniques. It has been found that the aluminum oxide coating layer transforms into lithium aluminate and promotes the nucleation of the layered oxide. High-resolution imaging techniques have observed the formation of layered oxide with fine primary particles. This study provides a new approach for developing high-strength battery materials.
Article
Chemistry, Multidisciplinary
Yue Zhang, Ying Liu, Wenda Bao, Xiangyu Zhang, Pu Yan, Xuan Yao, Ming-Zhu Chen, Tian-Yi Xie, Lei Cao, Xincan Cai, Haoyuan Li, Yingdong Deng, Lianqi Zhao, Ming-Hua Zeng, Shan Jiang, Yingbo Zhao, Jin Xie
Summary: Modularly designed crystalline metal-organic frameworks (MOFs) often require liquid electrolytes for interfacial contact. Monolithic glassy MOFs can have liquid processability and uniform lithium conduction, which is promising for the reticular design of solid-state electrolytes (SSEs) without liquid electrolytes.
Article
Nanoscience & Nanotechnology
Lianqi Zhao, Pu Yan, Tianying Liu, Xingzhi Wang, Zeyu Wang, Cong Wu, Wenda Bao, Haiyin Zhu, Yue Zhang, Jin Xie
Summary: This study reports a temperature-driven anisotropic doping phenomenon of Mg2+ that results in surface-populated Mg2+ doping to the side of the (003) plane of LiCoO2. The Mg2+ dopants lower the valence state of Co ions, promote the formation of surface Li+/Co2+ anti-sites, and suppress lattice oxygen loss, leading to excellent cycling performance of modified LiCoO2 under high voltage. The modified LiCoO2 achieves a high energy density and retains a high capacity after multiple cycles, highlighting the promising potential of anisotropic surface doping with Mg2+.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Wenda Bao, Yue Zhang, Lei Cao, Yilan Jiang, Hui Zhang, Nian Zhang, Ying Liu, Pu Yan, Xingzhi Wang, Yixiao Liu, Haoyuan Li, Yingbo Zhao, Jin Xie
Summary: In this study, a novel crosslinking strategy was proposed to crosslink metal-alkoxy-terminated polymers by controlling the content of H2O as an initiator. The resulting crosslinked polymer electrolyte showed high ionic conductivity, low interfacial resistance, and wide electrochemical window, making it suitable for stable battery performance at high temperatures.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Shaoyu Yang, Pu Yan, Wenda Bao, Haiyin Zhu, Xincan Cai, Lianqi Zhao, Yue Zhang, Weiyi Lin, Yingdong Deng, Yifan Wu, Jin Xie
Summary: Surface magnesium ion substitution significantly suppresses the surface evolution and manganese dissolution of LiMn2O4, solving the surface degradation issue that has lasted for decades. This study introduces a strategy of surface magnesium doping through ALD coating and annealing, resulting in high capacity retention after 250 cycles.
ACS ENERGY LETTERS
(2023)
Article
Green & Sustainable Science & Technology
Xincan Cai, Wenda Bao, Lianqi Zhao, Yuqing Zuo, Haojie Zhao, Longxing Su, Yue Zhang, Hui Zhang, Jin Xie
Summary: This study addresses the challenges of synthesizing lithium compounds with robust stability and a broad electrochemical window using atomic layer deposition (ALD). The in situ formation of a more stable LiPO3 phase under high voltage is demonstrated, improving the electrochemical performance of all-solid-state lithium batteries.
ADVANCED SUSTAINABLE SYSTEMS
(2023)
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)
