Article
Materials Science, Ceramics
Zhiyu Zhang, Jingjing Tang, Minkun Jin, Yuexin Li, Wang Chen, Changheng Chen, Jinmeng Xiang, Chongfeng Guo
Summary: Non-invasive photo-thermal therapy (PTT) with accurate temperature monitoring is important for effective cancer treatment. This study developed dual-function photothermal agents YVO4: Nd3+, Yb3+@IR-780 with real-time temperature control and excellent photothermal conversion. The temperature detection behavior based on fluorescence intensity ratio (FIR) and fluorescence lifetime thermometry were investigated. Results showed the potential application of these photothermal agents in photothermal therapy.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Qiang Wang, Shuang Zhao, Jun Wen, Xiaoxiao Huang, Chenlong Wei, Qiangsheng Xia, Zhongfei Mu, Hai Guo
Summary: Optical temperature sensing based on fluorescence intensity ratio (FIR) technology is a potential method for temperature measurement due to its fast response, non-invasive nature, and high accuracy. A multi-strategy combination method was used to study the multi-mode temperature sensing performance of optical temperature sensing materials, leading to the development of high-performance materials and the establishment of temperature sensing models. This approach opens up an effective pathway for the rapid development of inorganic optical temperature sensing materials.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Weidi Xia, Li Li, Yongbin Hua, Faling Ling, Yongjie Wang, Zhongmin Cao, Sha Jiang, Guotao Xiang, Xianju Zhou, Jae Su Yu
Summary: This study synthesized Sr2InSbO6 phosphors with good temperature sensing performances and found that the optimal doping concentration was 3%, resulting in significant temperature sensitivities.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Xiao Liu, Siqi Shi, Kai Yang, Liang Chen, Degang Deng, Shiqing Xu
Summary: SrGa2B2O7: Bi3+, Eu3+ phosphors were successfully synthesized through high temperature solid-state method, with their structure, luminescent characteristics and temperature sensing properties studied. The phosphors exhibited high absolute and relative temperature sensitivity, making them a promising optical thermometric material for temperature sensing applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Optics
Xiao Wu, Lulu Lou, Haicheng Feng, Guolin Lv, Qiang Wang, Daoyun Zhu, Chuanxin Jiang, Zhongfei Mu
Summary: Fluorescence intensity ratio-based temperature sensing technology, with advantages such as non-contact, fast response, and high precision, has become a focus in the field of temperature measurement. A newly prepared Bi3+ and Eu3+ co-doped luminescence material showed promising temperature sensing performance, adding a new candidate to the family of temperature sensing materials. The LaB3O6: Bi3+, Eu3+ sample exhibited absolute and relative sensitivities of 0.008 K-1 and 0.579 % K-1 at 423 K, respectively.
Review
Chemistry, Physical
Qiang Wang, Min Liao, Qiuming Lin, Mingxiang Xiong, Zhongfei Mu, Fugen Wu
Summary: This review examines the current research status of all inorganic thermometers based on fluorescence intensity ratio (FIR) technology, categorizing and analyzing the thermometers in detail, discussing performance parameters, and looking forward to the future development.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Optics
M. I. N. G. J. I. A. Shangguan, Z. H. I. F. E. N. G. Yang, M. I. N. G. Y. U. Shangguan, Z. A. I. F. A. Lin, Z. H. U. O. Y. A. N. G. Liao, Y. I. R. U. I. Guo, C. H. U. A. N. Liu
Summary: The detection of oil in water is crucial for maintaining underground infrastructures such as oil pipelines. Oceanic lidar has shown great potential for remote sensing of optical properties and subsea materials. However, its high power consumption and bulkiness hinder its deployment underwater for oil monitoring. To tackle this issue, a compact single-photon Raman lidar was developed, utilizing a high quantum efficiency and low dark noise single-photon detector. Through experimental demonstration, the lidar successfully detected underwater oil with different thicknesses up to 12 meters, suggesting its potential for inspecting underwater oil pipelines.
Article
Materials Science, Ceramics
Lixin Zhang, Qingyu Meng, Wenjun Sun, Shuchen Lue
Summary: In this study, Sm3+/Tb3+-co-doped NaGd(MoO4)(2) phosphors were prepared and their temperature-dependent emission spectra were analyzed to show that the fluorescence intensity ratio can be used to represent temperature. The temperature-sensing sensitivity of the phosphors gradually increased with the increasing sodium citrate and rare earth molar ratio. The Commission International del'Eclairage chromaticity coordinates displayed continuous color changes of the specimens from green to red with temperature.
CERAMICS INTERNATIONAL
(2021)
Article
Optics
D. V. M. Paiva, S. K. Jakka, M. A. S. Silva, J. P. C. do Nascimento, M. P. F. Grata, A. S. B. Sombra, M. J. Soares, S. E. Mazzetto, P. B. A. Fechine, K. Pavani
Summary: Eu3+-Tb3+ co-doped Sr3MoO6 (SMO) phosphors were synthesized by solid-state reaction. Characterization using PXRD and SEM showed no significant structural changes. SMO:Eu/Tb demonstrated potential for temperature sensing applications at low temperatures, with maximum sensitivities observed at 300 K.
Article
Engineering, Electrical & Electronic
Bin Li, Fan Zhang, Wei Liu, Xiaoyu Chen, Yuanhongliu Gao, Qi Zhang, Xin Yan, Fang Wang, Xuenan Zhang, Takenobu Suzuki, Yasutake Ohishi, Tonglei Cheng
Summary: In this study, a fluorescence intensity ratio (FIR) temperature sensor based on ZnS:Cu was proposed to address the issues of long-term dependence on rare-earth (RE) ions and insufficient stability in a fluorescent optical fiber temperature sensor. The sensor showed excellent linear response, stability, and repeatability in the tested temperature range, indicating its potential in temperature sensing applications.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2022)
Article
Multidisciplinary Sciences
Evgeny A. Shirshin, Marina V. Shirmanova, Alexey V. Gayer, Maria M. Lukina, Elena E. Nikonova, Boris P. Yakimov, Gleb S. Budylin, Varvara V. Dudenkova, Nadezhda I. Ignatova, Dmitry V. Komarov, Vladislav V. Yakovlev, Wolfgang Becker, Elena V. Zagaynova, Vladislav I. Shcheslavskiy, Marlan O. Scully
Summary: The heterogeneity of cells determines their response to external factors, and the metabolic heterogeneity of tumor cells is of clinical relevance. Fluorescence lifetime imaging (FLIM) is a non-invasive technique that can sense and quantify cellular metabolism by measuring the fluorescence decay parameters of endogenous fluorophores. This study demonstrates the unique capability of FLIM in accurately discriminating metabolic heterogeneity using a non-parametric analysis approach, which has been validated in cultured cancer cells treated with chemotherapy.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Chemistry, Inorganic & Nuclear
Raul Isaac Lopez-Esquivel, Juan Carlos Guzman-Olguin, Ismael A. Garduno-Wilches, Laura Esther Lopez Ruiz, Teodoro Rivera Montalvo, Jose Guzman-Mendoza
Summary: In this study, we utilized 395 nm ultraviolet radiation to excite the matrix of barium hafnate doped with europium ions, resulting in the development of an optical temperature sensor. Luminescent analysis conducted within the physiological range revealed significant variations in luminescent intensity across all transitions. When the temperature of the material increased from 289.7 to 323.8 K, a relative sensitivity of 1574.3/T^2 was achieved. The 5D0 -> 7F2 transition exhibited the best temperature resolution (1.1 x 102 K).
APPLIED RADIATION AND ISOTOPES
(2023)
Article
Materials Science, Ceramics
K. Pavani, A. J. Neves, Ricardo J. B. Pinto, Carmen S. R. Freire, M. J. Soares, M. P. F. Graca, K. Upendra Kumar, S. K. Jakka
Summary: Highly thermally stable Er3+/Tm3+/Yb3+ tri-doped bismuth lanthanum tungstate phosphors were prepared by high temperature solid-state reaction method. Their structure, morphology and luminescence properties were analyzed using various techniques, revealing the maximum sensitivity of the TCL related to Er3+ UC at 300 K. Temperature dependent CIE color coordinates were also evaluated in the cryogenic temperature region.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
Y. Hua, T. Wang, W. Xia, J. S. Yu, L. Li
Summary: Novel red-emitting Ba2Y0.8Eu0.2NbO6:Mn4+ phosphors were designed for multi-type non-contact luminescent thermometers based on the dual-emission states and temperature-dependent lifetime models. The phosphors showed high sensing sensitivities and have the potential for various applications in thermometers.
MATERIALS TODAY CHEMISTRY
(2022)
Article
Engineering, Chemical
Shuwen Yuan, Shuang Zhao, Lulu Lou, Daoyun Zhu, Zhongfei Mu, Fugen Wu
Summary: A novel Pr3+, Tb3+ co-doped YNbO4 phosphor has been successfully developed for non-contact optical temperature measurement, showing high sensitivity and stability. By measuring the fluorescence intensity of red and green emissions, temperature can be accurately monitored, with significant influence of temperature changes on the fluorescence color.
Article
Optics
Irina V. Berezovskaya, Shihang Zhou, Bibo Lou, Min Yin, Chong-Geng Ma, Anatoliy S. Voloshinovskii, Vladimir P. Dotsenko
Summary: The luminescence properties of Ce3+ ions in Ca2BO3Cl were studied through experiments and theoretical calculations. Different centers involving Ce3+ were formed in Ca2BO3Cl due to the presence of different charge compensating defects. Experimental results and first-principles calculations showed that the introduction of Na+ hardly influenced the luminescence properties of Ce3+-doped Ca2BO3Cl.
JOURNAL OF LUMINESCENCE
(2022)
Article
Materials Science, Multidisciplinary
Fengfeng Chi, Wenjuan Dai, Shengli Liu, Liting Qiu, Xiantao Wei, Yonghu Chen, Min Yin
Summary: Near-infrared phosphor-converted light-emitting diodes (pc-LEDs) are being used for food safety and health monitoring. In this study, Cr3+-doped Al6Ge2O13 (AGO) phosphors were synthesized for near-infrared pc-LEDs. The phosphors exhibited strong blue light absorption and broad near-infrared emission, showing good luminous thermal stability and high output power.
Article
Materials Science, Ceramics
Fengfeng Chi, Liangliang Pan, Bin Jiang, Zhangchao Ji, Jie Cheng, Bing Wang, Xiantao Wei, Shengli Liu
Summary: Tb3+ and Eu3+ doped La4GeO8 phosphors with multicolor emission were synthesized and their photoluminescence properties were investigated. The energy transfer from Tb3+ to Eu3+ in La4GeO8 is attributed to quadrupole-quadrupole interaction. The La4GeO8:0.07Tb3+,0.01Eu3+ phosphor exhibits good thermal stability with activation energies of 0.186 eV and 0.187 eV for Tb3+ and Eu3+ ions, respectively. By adjusting the content ratio of Eu3+ to Tb3+, the La4GeO8:Tb3+,Eu3+ phosphors can achieve multicolor luminescence and tunable chromaticity. These findings suggest that La4GeO8:Tb3+,Eu3+ phosphors are promising for solid-state lighting applications.
CERAMICS INTERNATIONAL
(2023)
Article
Optics
Fengfeng Chi, Wenjuan Dai, Liting Qiu, Shengli Liu, Xiantao Wei, Yonghu Chen, Min Yin
Summary: In this study, a Cr3+-activated Lu2CaAl4GeO12 phosphor with far-red emitting was prepared, and its thermally stable luminescence was observed.
JOURNAL OF LUMINESCENCE
(2022)
Article
Physics, Applied
Xiaobin Zhang, Liming Liu, Feng Chi, Ke Wang, Kaiwen Lin, Yuehui Wang
Summary: The lattice-matched III-N-V/Si double-junction solar cells with GaNAsP and GaInNP top cells were designed and their efficiencies were calculated by varying the electron lifetime and electron surface recombination velocity in the top cell. The optimal efficiency of the GaNAsP/Si cell increased from 31.12% to 36.13% with the increase in electron lifetime, while the effect of electron surface recombination velocity was negligible. The optimal efficiency of the GaNAsP/Si cell was less sensitive to electron surface recombination velocity compared to electron lifetime. Moreover, the optimal efficiency of the GaNAsP/Si cell slightly decreased with thinner Si substrate but had a maximum with a specific doping concentration.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Chemistry, Inorganic & Nuclear
Fengfeng Chi, Zhangchao Ji, Qian Liu, Bin Jiang, Bing Wang, Jie Cheng, Bin Li, Shengli Liu, Xiantao Wei
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Physical
Liang Li, Qianwen Cao, Jing Xie, Wenming Wang, Jiajia Wang, Yan Pan, Xiantao Wei, Yong Li
Summary: Researchers successfully prepared a far-red emitting phosphor doped with Mn4+ ions, which can be efficiently excited and emit intense far-red light. The crystalline properties and luminescence performance were studied in detail, and the crystalline field effect and concentration quenching mechanism of Mn4+ ions in the matrix were explored. The phosphor exhibited high internal quantum efficiency, color purity, and activation energy, making it suitable for the preparation of LED devices for plant cultivation.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Wenming Wang, Liang Li, Hongmei Chen, Xiantao Wei, Juanying Jia, Yan Pan, Yong Li
Summary: In this study, Yb3+/Er3+ co-doped YOF glass ceramics were prepared and their luminescence and temperature sensing properties were investigated under 980 nm excitation. The fluorescence intensity ratio (FIR) of the thermal couple energy level (TCEL) and non-thermal couple energy level (NTCEL) was used to evaluate the temperature sensing sensitivity. The increase in pump power resulted in a decrease in relative sensitivity (SR) due to the thermal effect and increased rate of energy transfer and non-radiative relaxation process between dopants and host. The maximum relative sensitivity of this sample reached 1.59 x 10-2 K-1 at 310 K with a pump power of 0.2 W, indicating the prospective application of this glass ceramic in optical thermometry.
Article
Chemistry, Physical
Zhicheng Liao, Liting Qiu, Xiantao Wei, Yonghu Chen
Summary: A novel heat-quenching resistant phosphor Ba2YAlO5 doped with Bi3+ was successfully synthesized using the traditional high temperature solid-state method. The crystal structure and luminescence properties were characterized by XRD, SEM, DR spectra, and PL spectra. The phosphor exhibited a broad-band yellow light with a peak at 571 nm and a FWHM of 125 nm under 324 nm excitation. The integrated emission intensity at 560 K was still close to that at room temperature, indicating its excellent thermal stability. Ba2YAlO5: Bi3+ also showed yellowish white light with high color temperature, making it a promising fluorescent powder for high-power devices.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Optics
Jia Liu, Xiao Kun Ji, Miao Sun, Feng Chi, Luo Meng Chao, Yong Hong Ma
Summary: The linear photogalvanic effect (LPGE) in Janus monolayer MoSSe with different central regions is investigated. The photocurrent is found to depend on the polarization angle of the incident light. The introduction of intrinsic defects increases the photocurrent at various photon energies. The results provide an effective method to enhance the photocurrent of photodetectors and are useful for optoelectronic detection applications of monolayer MoSSe.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Physics, Applied
Xianghong Niu, Xuemei Zhang, Anqi Shi, Dazhong Sun, Ruilin Guan, Wenchao Shan, Fengfeng Chi, Shasha Li, Bing Wang, Xiuyun Zhang
Summary: The construction of van der Waals heterojunctions with a suitable twisted angle is an efficient strategy to regulate the photocatalytic properties of two-dimensional materials. The twisted C3N/C3B heterojunctions enhance the built-in electric field, improve the visible light response, and reduce the overpotential for the oxygen evolution reaction. The interlayer torsion provides an effective regulation strategy to improve the overall water splitting performance.
APPLIED PHYSICS LETTERS
(2023)
Article
Optics
Fengfeng Chi, Liangliang Pan, Bin Jiang, Xiuyun Zhang, Bo Zhang, Xianghong Niu, Shengli Liu, Xiantao Wei
Summary: There is significant interest in trivalent chromium ion-doped phosphors for near-infrared luminescence. In this study, trivalent chromium-doped SrGa2Si2O8 phosphors emitting near-infrared light were synthesized. The electronic structure was calculated and a transformation from [GaO4] tetrahedron to [CrO6] octahedron was observed due to the doping of Cr3+. The luminescent properties of SrGa2Si2O8:Cr3+ were systematically studied, and its high thermal stability and potential as a near-infrared LED light source were demonstrated.
JOURNAL OF LUMINESCENCE
(2023)
Article
Engineering, Electrical & Electronic
Chengfeng Pan, Wentao Li, Anqi Shi, Wenxia Zhang, Huabing Shu, Fengfeng Chi, Wei Chen, Xianghong Niu, Bing Wang, Xiuyun Zhang
Summary: Compared with bulk metals, two-dimensional materials are more conducive to avoiding the occurrence of the strong Fermi-level pinning effect in metal-semiconductor junctions (MSJs). However, the presence of a van der Waals gap in 2D materials leads to a low tunneling probability. By investigating the contact characteristics and tunneling probability of ferroelectric In2S3 and 2D metals X3C2 (X = Cd, Hg, Zn) and graphene, it was found that Ohmic contact can be achieved by switching the polarization direction of In2S3, but the highest tunneling probability observed was only 18.32%.
ACS APPLIED ELECTRONIC MATERIALS
(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)