Article
Chemistry, Physical
Shunli He, Lichun Zhang, Dan Tian, Zhiying Zhou, Anqi Guo, Bin Xia, Yadan Zhu, Fengzhou Zhao
Summary: In this study, high-quality Cs3Cu2Br5 thin films with good stability were prepared on GaN substrates by pulse laser deposition (PLD) for the first time. The morphology, crystal structure, and photoelectric properties of the Cs3Cu2Br5 thin films were systematically studied. A self-powered UV photodetector based on Cs3Cu2Br5/n-GaN heterojunction was fabricated, exhibiting two dominant responses in the UV region.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Cheng Wang, Fengzhou Zhao, Zhiying Zhou, Xiaoxuan Li, Shunli He, Menglong Zhang, Dengying Zhang, Lichun Zhang
Summary: All-inorganic perovskite CsCu2I3 thin films were prepared on Si(100) substrates using pulsed laser deposition technology. The morphology, structure, and optical properties of CsCu2I3 films were investigated, and a CsCu2I3/Si n-n heterojunction UV photodetection device was constructed. The device demonstrated excellent self-powered photoresponse performance and good spectral selectivity in the UV range.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Electrical & Electronic
Yuanjie Li, Hailong Ma, Wenbo Hu, Yuqing Zhao
Summary: In this work, flexible ultraviolet (UV) photodetectors based on nanocrystalline zinc oxide (ZnO) films were successfully developed on polyimide substrates using radio frequency magnetron sputtering and shadow mask deposition. The devices exhibited high visible transparency, large photo-to-dark current ratio, and enhanced photoresponse performance. The realization of transparent oxide film-based UV photodetectors on flexible substrates has potential for developing high-performance and large-scale wearable optoelectronic devices.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Multidisciplinary
Laid Kadri, Abdelkader Abderrahmane, Georgiana Bulai, Aurelian Carlescu, Corneliu Doroftei, Iuliana Motrescu, Silviu Gurlui, Liviu Leontie, Mohamed Adnane
Summary: TiO2-SiO2 nanocomposite thin films were fabricated and characterized, and their amorphous structure and homogeneous distribution were observed. The deposition temperature had an effect on the optical properties, with lower temperature resulting in increased light transmission in the visible and ultraviolet ranges.
Article
Chemistry, Physical
Seyedeh Soraya Mousavi, Batool Sajad, Mehrnaz Simdar
Summary: Graphene-based composite thin films were deposited on glass substrates using Pulsed Laser Deposition (PLD) at room temperature. The annealing temperature was found to have a significant effect on the chemical properties and photocatalytic activity of the nanocomposite films. The stoichiometry and optical characteristics of the films could be accurately adjusted through optimized annealing temperature. Confocal Raman spectroscopy confirmed the formation of a composite film with features of both ZnO and GQDs at 300°C. The optimized nanocomposite film showed a high photocatalytic ability with an 84% degradation rate for dye.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Dongwen Gao, Li Wang, Xueqiong Su, Jin Wang, Ruixiang Chen
Summary: This study investigated the impact of a magnetic field on the optical properties of Co-doped ZnS nano films. By manipulating the growth structure of the film during deposition using a magnetic environment, the optical properties were enhanced. Experimental results under magnetic field conditions were consistent with simulation results, confirming the improved optical properties.
Article
Engineering, Electrical & Electronic
Chenxiao Xu, Leyun Shen, Hao Liu, Xinhua Pan, Zhizhen Ye
Summary: High-quality beta-Ga2O3 films were grown on (0001) sapphire substrates at various substrate temperatures using pulsed laser deposition in a high vacuum chamber. The films were used to fabricate metal-semiconductor-metal solar-blind photodetectors with low dark current, fast response speed, and high responsivity. These results demonstrate the high quality and excellent performance of PLD-grown beta-Ga2O3-based MSM solar-blind photodetectors.
JOURNAL OF ELECTRONIC MATERIALS
(2021)
Article
Chemistry, Physical
Yongjian Luo, Zhenxun Tang, Xiaozhe Yin, Chao Chen, Zhen Fan, Minghui Qin, Min Zeng, Guofu Zhou, Xingsen Gao, Xubing Lu, Jiyan Dai, Deyang Chen, Jun -Ming Liu
Summary: This study demonstrates that ferroelectric properties can be observed in non-capped dopant-free HfO2 thin films by adjusting the deposition temperature, oxygen pressure, and thickness. A maximum polarization strength of 14.7 mu C/cm(2) was achieved in a 7.4 nm-thick film, suggesting a new method for fabricating high-quality ferroelectric HfO2 thin films.
JOURNAL OF MATERIOMICS
(2022)
Article
Chemistry, Physical
Akshana Parameswaran Sreekala, Bindu Krishnan, Rene Fabian Cienfuegos Pelaes, David Avellaneda Avellaneda, Josue Amilcar Aguilar-Martinez, Sadasivan Shaji
Summary: This research investigates the fabrication and characterization of SnS-Si hybrids for photodetection and photocatalysis. The results show that post-deposition annealing improves the material properties of the hybrid films. The hybrid films exhibit good performance in terms of light detection and photocatalytic activity.
SURFACES AND INTERFACES
(2023)
Article
Physics, Applied
Anqi Guo, Lichun Zhang, Ning Cao, Taiping Lu, Yadan Zhu, Zhiying Zhou, Shunli He, Bin Xia, Fengzhou Zhao
Summary: Due to its ultra-wideband gap, high transmittance in the UV region, and excellent environmental stability, zinc gallium oxide (ZnGa2O4) has gained significant interest in deep-ultraviolet photodetectors. ZnGa2O4 thin film was fabricated on different substrates using pulsed laser deposition and post-annealing under an oxygen atmosphere. The choice of substrates has a significant impact on the morphology, structure, and crystal quality of the thin film. After annealing, the thin film quality was improved. The metal-semiconductor-metal photodetector exhibited excellent reproducible characteristics and fast response performance, indicating great potential in next-generation optoelectronic devices.
APPLIED PHYSICS EXPRESS
(2023)
Article
Materials Science, Ceramics
Shaojing Mou, Jiachao Ye, Rongji Zhu, Ruojie Li, Linfei Liu, Yijie Li
Summary: In this study, we investigated the effect of laser repetition rate on the properties of FST superconducting films deposited by pulsed laser deposition. We found that as the laser repetition rate increases, the crystallinity and stoichiometry of the films deteriorate, resulting in a degeneration in superconductivity. However, by increasing the substrate temperature, we were able to successfully deposit high-performance FST films at a high repetition rate.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Chemistry, Physical
Stefan Andrei Irimiciuc, Sergii Chertopalov, Maksym Buryi, Zdenek Remes, Martin Vondracek, Ladislav Fekete, Michal Novotny, Jan Lancok
Summary: CuI thin films were deposited with controlled morphology, structure, and defect nature in different Ar atmospheres. Band gap tailoring was achieved by controlling the plasma ion kinetic energy. Variation in Ar pressure allowed control over the nature of vacancies. Addition of Ar resulted in preferential scattering and energy losses of Cu ions in the plasma.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Rovena Veronica Pascu, George Epurescu, Iulian Boerasu, Ana -Maria Banici Niculescu, Dumitru Manica, Alexandra Maria Isabel Trefilov, Bogdan Alexandru Sava
Summary: Samarium doped ceria thin films were successfully deposited on Si (100) substrates at 500 and 600 degrees C using Pulsed Laser Deposition. X-ray Diffraction confirmed the presence of Samarium Doped Cerium Oxide crystalline compound in the films. Atomic Force Microscopy and Scanning Electron Microscopy revealed high quality films with low roughness, especially for the sample deposited at 600 degrees C. X-ray Photoelectron Spectroscopy showed an increased proportion of Ce3+ in the deposited films compared to the target. Spectroscopic Ellipsometry analysis calculated a refractive index under 2.2 in the visible and near-infrared domain. Nanoindentation tribometric measurements indicated a decrease in elasticity modulus and hardness with increasing substrate temperature. These films show potential as electrolyte materials for new generation electrochemical devices.
APPLIED SURFACE SCIENCE
(2022)
Article
Optics
Yalun Xu, Wei Li, Tian Yu, Yanyan Li, Ruiming Li, Qianqian Lin
Summary: The introduction of an interfacial modification strategy in perovskite photodiodes effectively slows down photovoltage decay, enabling easy detection of modulated light emitting diodes and ultra-fast pulsed-lasers. These photodetectors based on polyvinylidene fluoride exhibit low noise voltage and high responsivity, showing great potential for real applications.
LASER & PHOTONICS REVIEWS
(2021)
Article
Materials Science, Coatings & Films
Falko Jahn, Steffen Weissmantel
Summary: Boron carbide is a super-hard material suitable for wear resistant coatings. Its hardness is significantly influenced by substrate temperature, with little effect from laser fluence.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Chemistry, Physical
Yuqi Zhou, Shuaibing Gao, Jie Huang, Meng Shen, Shenglin Jiang, Yunbin He, Qingfeng Zhang
Summary: In this study, novel La3+ and Ta5+ co-substituted AgNbO3 ceramics were developed, which enhanced antiferroelectric phase stability and refined polarization-electric field loops by decreasing the tolerance factor, reducing the polarizability of B-site cations, and increasing local structure heterogeneity. The addition of La3+ and Ta5+ also reduced grain sizes and increased the band gap, contributing to increased energy storage capacity. The resulting (Ag0.88La0.04)(Nb0.96Ta0.04)O3 ceramics demonstrated a high recoverable energy density of 6.79 J/cm3 and large efficiency of 82.1%, surpassing many recently reported AgNbO3 based ceramics in overall energy storage properties.
JOURNAL OF MATERIOMICS
(2023)
Article
Chemistry, Physical
Wenyu Fang, Kuan Kuang, Xinglin Xiao, Haoran Wei, Yue Chen, Mingkai Li, Yunbin He
Summary: Two-dimensional materials, MgAl2Se4 and MgIn2Se4, possess low thermal conductivity and high electrical properties, showing potential applications in nanoelectronics and thermoelectric devices.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Nanoscience & Nanotechnology
Shuang Yan, Gaochen Yang, Huanfeng He, Qi Liu, Qingqi Peng, Jian Chen, Mingkai Li, Yinmei Lu, Yunbin He
Summary: In this study, Hf0.5Zr0.5O2/beta-Ga2O3 heterojunction-based self-driven solar-blind UV photodetectors were constructed by combining ferroelectric Hf0.5Zr0.5O2 material with Ga2O3. The optimized device with a HfZrO2 layer thickness of 10 nm showed remarkable responsivity and detectivity, outperforming single Ga2O3-based devices. The device's performance could be adjusted by varying the poling states of HfZrO2 and showed significant enhancement in the upward poling state.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Shuaibing Gao, Yue Huang, Ying Jiang, Meng Shen, Haitao Huang, Shenglin Jiang, Yunbin He, Qingfeng Zhang
Summary: In this study, Ce4+ and Ta5+ co-modified (Ag0.96Ce0.01)(Nb1-xTax)O3 relaxor antiferroelectric (AFE) ceramics were designed to improve the energy storage properties of silver niobate (AgNbO3). The co-doping strategy not only suppressed the ferrielectric behavior and enhanced the relaxor degree, but also improved the breakdown strength and discharge properties of the ceramics. The resulting ceramic exhibited an ultrahigh recoverable energy density, large power density, and stable discharge capacity over a wide temperature range.
Article
Materials Science, Ceramics
Jian Chen, Jiaxing Mao, Zihui Wang, Yanhui Dong, Jinming Guo, Mingkai Li, Yi Zhang, Yinmei Lu, Yunbin He
Summary: In this work, lead-free ceramics with narrow bandgaps and large remanent polarization are obtained via Fe2O3 doping. The optimized ceramic possesses a narrow bandgap of 1.74 eV and a large remanent polarization of 27.05 muC/cm2. Furthermore, a switchable photovoltaic effect is observed in the ceramic-based device.
JOURNAL OF ADVANCED CERAMICS
(2023)
Article
Physics, Applied
Hao Lu, Lei Li, Zhiwu Tang, Maji Xu, Yonghui Zheng, Martin Becker, Yinmei Lu, Mingkai Li, Pai Li, Zaoli Zhang, Peter J. J. Klar, Yunbin He
Summary: We explore the possibility of tuning the metal-to-insulator transition (MIT) of crystalline VO2 thin films by strain engineering. Thin VO2 films on TiO2 (110) substrates are almost fully strained up to thicknesses of about 20 nm and exhibit tensile strain along the c axis of the (high-temperature) metallic rutile phase leading to an increase in the MIT temperature by as much as 30 & DEG;C in comparison to the almost fully relaxed 300 nm-thick VO2 film. The strain gradient within the thicker samples leads to a continuous serial switching of layered regions of the VO2 film from the insulating to the metallic state with increasing temperature.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Physical
Yue Chen, Wenyu Fang, Fengxin Liu, Kuan Kuang, Xinglin Xiao, Haoran Wei, Mingkai Li, Yunbin He
Summary: Based on first-principles calculations, the properties and characteristics of Au contacts on different SnO2 interfaces were investigated. The Schottky barrier height (SBH) was found to strongly depend on the interface structure and the presence of oxygen vacancies (VO) in the SnO2 layer. Additionally, doping with low-valence elements can alter the contact properties. The modulation effect of SBH is mainly caused by the rearrangement of interfacial potentials and results in different SBH values.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Pan Huang, Lufeng Chen, Daotian Shi, Qi Liu, Jian Chen, Mingkai Li, Yinmei Lu, Jinming Guo, Yunbin He
Summary: In this study, high-quality beta-Ga2O3 thin films were heteroepitaxially grown on MgO(100) substrates using pulsed laser deposition, and highly-sensitive solar-blind ultraviolet photodetectors were achieved. The beta-Ga2O3 films were single-phase, (100)-oriented, and atomically-smooth with unique columnar nanodomains of 8-12 nm width.
APPLIED SURFACE SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Junnian Chen, Xingfu Xiao, Yue Chen, Mingkai Li, Wenyu Fang, Zixian Yu, Biqi He, Tianyou Zhai, Yunbin He
Summary: This study reports a method of modulating the structural distortion by steric hindrance effects to change the morphology of bismuth bromide chains. By interacting with bismuth bromide, N,N,N & PRIME;,N & PRIME;-tetramethyl-1,4-phenylenediammonium (TMPD)(2+) is used to template regular BiBr5 chains, resulting in a narrow-bandgap mixed 0D/1D (TMPD)(2)(Bi2Br10H2O)-H-. This finding offers new insights into developing narrow-bandgap perovskite hydrates for practical optoelectronic applications.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Physical
Zhenhao Fan, Shuaibing Gao, Yunfei Chang, Dawei Wang, Xin Zhang, Haitao Huang, Yunbin He, Qingfeng Zhang
Summary: Current polymer nanocomposites for energy storage suffer from low discharged energy density and efficiency at high temperature. To solve this problem, polyetherimide (PEI) nanocomposites filled with core-shell structured nanoparticles are developed, which consist of a PLZST antiferroelectric core and an Al2O3 shell. The PLZST core provides a wide temperature range of low remnant electric displacement, improving the electric displacement-electric field loops of the nanocomposites. The Al2O3 shell with similar dielectric constant to the PEI matrix and high thermal conductivity enhances breakdown strength and suppresses conduction loss, resulting in an ultrahigh discharged energy density of 10.20 J cm(-3) at 150 degrees C and a large efficiency of 83.5%.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Materials Science, Multidisciplinary
Yingying Cheng, Jiaxing Mao, Hongyi Zhu, Yanhui Dong, Jian Chen, Mingkai Li, Yinmei Lu, Yunbin He
Summary: In this study, a strategy for constructing Ga2O3/BFMO heterojunction-based photodetectors was proposed to enhance responsivity and detectivity by utilizing the built-in electric field and ferroelectric depolarization electric field for carrier separation. The fabricated photodetector exhibited tunable performance under zero bias, with higher performance observed in the upward poling state and under weak light illumination.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Biqi He, Kuan Kuang, Bing Xu, Junjie Tang, Sheng Cao, Zixian Yu, Mingkai Li, Yunbin He, Junnian Chen
Summary: A one-dimensional hybrid lead bromide perovskitoid based on hexamethonium has been developed for broadband red emission. The unique structure results in intriguingly red emission peaking at 692 nm, with a PLQY of around 6.24%. Spectroscopic and computational studies reveal the origin of the red emission.
CHEMICAL COMMUNICATIONS
(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)
