Article
Chemistry, Physical
Ye Wang, Zhijie Yang, Jingjing Wei
Summary: In this study, the self-assembly of Ag nanocrystals grafted with polystyrene ligands was reported, and the correlation between the plasmonic coupling effect and interparticle gaps was unveiled using numerical simulations.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Nanoscience & Nanotechnology
Young Un Kim, Na Yeon Kwon, Su Hong Park, Chai Won Kim, Hong Diem Chau, Mai Ha Hoang, Min Ju Cho, Dong Hoon Choi
Summary: In this study, a novel patterned sandwich-type AgNW-based transparent electrode was demonstrated using the photolithography method, showing good adhesion and uniformity. The AgNW layer could be easily patterned without lift-off or removal methods. Additionally, AgNW-based electrodes exhibited good optical and electrical properties, making them suitable for optoelectronic devices, and flexible polymer solar cells using these electrodes showed high power conversion efficiency and mechanical stability.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Review
Chemistry, Multidisciplinary
Peter Sutter, Eli Sutter
Summary: Advancements in understanding colloidal chemistry and self-assembly in solution have enabled precise control over nanocrystal size, shape, and composition. Traditional methods of investigation have limitations in obtaining mechanistic information, whereas real-time electron microscopy provides high resolution and the ability to observe processes in solution without the constraints of sampling.
ACCOUNTS OF CHEMICAL RESEARCH
(2021)
Review
Chemistry, Multidisciplinary
Yi Yang, Bowei Xu, Jianhui Hou
Summary: Organic solar cells have gained attention for their flexibility and semi-transparency, with silver nanowires being a promising candidate for transparent conducting electrodes. The review covers the properties, preparation methods, optimization approaches, and applications of AgNW-based TCEs in OSCs, as well as the challenges and guidelines for practical use.
CHINESE JOURNAL OF CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Jin-Long Wang, Si-Zhe Sheng, Zhen He, Rui Wang, Zhao Pan, Hao-Yu Zhao, Jian-Wei Liu, Shu-Hong Yu
Summary: Inspired by the concept of galvanic cell, a self-powered flexible electrochromic device has been developed by integrating Ag/W18O49 nanowire film with an Al sheet. This device, requiring no external power source, can generate enough driving force through the combination of Ag nanowire film and Al sheet, showing great potential for future applications in flexible electrochromic smart windows.
Article
Materials Science, Multidisciplinary
Bing Lei, Mingxiao Peng, Ling Liu, Shengnan Hu, Wei Zhang, Guozhe Meng
Summary: The galvanic corrosion of the porous multi-layer Al-BN abradable coating system is mainly influenced by the deposition of its corrosion products, leading to a three-stage process in chloride solution.
Article
Chemistry, Multidisciplinary
Weixi Lin, Chao Yang, Yu Miao, Sen Li, Limin Zhang, Xiao-Fang Jiang, Ying Lv, Bed Poudel, Kai Wang, Lakshminarayana Polavarapu, Chen Zhang, Guofu Zhou, Xiaowen Hu
Summary: This study demonstrates the first circularly polarized amplified spontaneous emission (ASE)/lasing from a free-standing membrane device made of perovskite nanocrystals (PNCs) and cholesteric liquid crystals (CLCs) layers. The device exhibits outstanding flexibility, stability, and high polarization degree. This work not only proves the ASE characteristics of perovskite nanocrystal membranes, but also paves the way for the fabrication of flexible, stable, and all-solution-processable perovskite chiral laser devices.
ADVANCED MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Joon Woo Park, Woong Choi, Juhwan Noh, Woonghyeon Park, Geun Ho Gu, Jonghyeok Park, Yousung Jung, Hyunjoon Song
Summary: Alloy formation is an advanced approach that improves properties beyond what monoelements can achieve. The Au-Ag alloy nanostructures exhibit prominent catalytic properties in the electrochemical carbon dioxide reduction reaction (eCO(2)RR), with superior performance compared to pure elements. The optimal configuration of the active intermediate *COOH involves a bidentate coordination structure where C binds to Au and O binds to Ag, in agreement with experimental results. This study offers new insights into the synergistic roles of Au and Ag in eCO(2)RR and provides a direction for rational design of bimetallic catalysts.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Yi Peng, Nikhil Raj, Juliette W. Strasser, Richard M. Crooks
Summary: This study reports the use of silver nanodisks (AgNDs) as electrochemical labels for the detection of the heart failure biomarker NT-proBNP. The AgNDs labels showed superior performance compared to other silver nanocubes and nanospheres, with a detection range that fully overlaps the risk stratification range for heart failure.
Article
Engineering, Environmental
Lulu Lyu, Chae Won Kim, Kwang-dong Seong, Jeongmin Kang, Shude Liu, Yusuke Yamauchi, Yuanzhe Piao
Summary: This research developed defect-rich heterogeneous Zn-birnessite@spinel ZnMn2O4 nanocrystal composites with enhanced redox chemistry. The innovative design supplies rich redox couples, active sites, and shortened ion transport pathways for high-performance energy storage. The heterostructure's reduced bandgap and fast reaction kinetics enable large areal capacitance, high rate performance, and long cycle life, showing potential for tailored electrochemical reactivity through defect engineering.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Nanoscience & Nanotechnology
Kun Huang, Junchen Liu, Sen Lin, Yufeng Wu, Enfu Chen, Zhaofeng He, Ming Lei
Summary: The newly developed AgPHPUS ECG electrode has a unique structure, with good flexibility and stability, accurately collecting ECG signals during long-term and repeated use.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Shengrui Chen, Runming Tao, Ji Tu, Pingmei Guo, Guang Yang, Wenjun Wang, Jiyuan Liang, Shih-Yuan Lu
Summary: A novel ion exchange-assisted indirect carbon coating strategy is proposed to fabricate high-performance TMO-based anodes, addressing the issues of poor high-rate capability and cycling stability. This strategy enhances electrical conductivity, alleviates structural instability induced by volume variation, provides fast lithium-ion diffusion pathways, and improves electron transfer kinetics, resulting in outstanding electrochemical performances. The freestanding anode exhibits high areal capacity, excellent high-rate capability, and cycling stability, confirming the flexibility of the electrode against mechanical deformation.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Jihye Park, Sun Hwa Park, Soo-Hwan Jeong, Jung-Yong Lee, Jae Yong Song
Summary: The corrosion mechanism and kinetics of silver-coated conductive yarn (SCCY) used for wearable electronics were investigated in a NaCl solution. It was found that silver reacts with chlorine ions to form silver chloride on the SCCY surface, which is then detached into the electrolyte, leading to electrical disconnect. Electrodeposition of gold in the longitudinal direction on SCCY, with partial electrodeposition in the radial direction, extends the electrical conducting lifetime despite increased corrosion rate. Results indicate that the cost-effective gold part-coating provides continuous current path until all silver underneath is detached.
FRONTIERS IN CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Yi Peng, Charlie Rabin, Charuksha T. Walgama, Nicole E. Pollok, Leilani Smith, Ian Richards, Richard M. Crooks
Summary: This study utilized 40+/-4 nm silver nanocubes as electrochemical labels in bioassays, demonstrating that changing the shape of the Ag label from spherical silver nanoparticles to AgNCs can achieve a lower limit of detection and increase the exchange efficiency. The optimized electrochemical system reached a detection limit of 0.1 pM AgNCs, which is an order of magnitude lower than that of sAgNP labels.
Article
Chemistry, Multidisciplinary
C. G. Ann Maria, Ananya S. Agnihotri, Anitha Varghese, M. Nidhin
Summary: A sensitive and selective sensor for the detection of arsenic (iii) in polluted water samples has been developed using chitosan-stabilized silver nanoparticles (AgNPs). The synthesized silver nanoparticles have a size of 6 nm and a polydispersity index (PDI) of 0.3, enhancing the electroactive surface area and sensor sensitivity. The sensor shows high selectivity even in the presence of other possible interferents. The detection of As(iii) was performed using differential pulse anodic stripping voltammetry (DPASV), with a detection limit of 11.39 pM.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Watcharaphol Paritmongkol, Woo Seok Lee, Wenbi Shcherbakov-Wu, Seung Kyun Ha, Tomoaki Sakurada, Soong Ju Oh, William A. Tisdale
Summary: In this study, we demonstrate the control of crystal size and orientation in silver phenylselenolate (AgSePh) by adding solvent vapors during chemical transformation. By testing 28 different solvent vapors, we show that the choice of solvent vapor can greatly improve the crystal size and orientational homogeneity of AgSePh. Particularly, solvents known to form complexes with silver ions result in the largest crystal dimensions and parallel crystal orientation. Moreover, AgSePh films grown with DMSO vapor exhibit improved crystalline quality and optical properties.
Article
Nanoscience & Nanotechnology
Woo Seok Lee, Yoon-Gu Kang, Manoj Sharma, Yong Min Lee, Sanghyun Jeon, Ashma Sharma, Hilmi Volkan Demir, Myung Joon Han, Weon-Kyu Koh, Soong Ju Oh
Summary: By studying the effects of surface chemistry treatment and Cu, Ag doping on structural, optical, and electrical properties of CdSe nanoplatelets and thin films, it was found that doping can alter the electrical properties, which was experimentally confirmed. Temperature-dependent electrical characterization was conducted to further understand charge transport behavior depending on the existence of dopants.
ADVANCED ELECTRONIC MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Yong Min Lee, Byung Ku Jung, Junhyuk Ahn, Taesung Park, Chanho Shin, Tse Nga Ng, In Soo Kim, Ji-Hyuk Choi, Soong Ju Oh
Summary: An effective surface-doping strategy for CdSe nanocrystals is introduced, which shows that smaller nanocrystals are more easily doped due to their larger specific surface area. A flexible CdSe nanocrystal thin-film transistor is successfully fabricated at a low temperature, with high electron mobility and on-to-off current ratio.
ADVANCED ELECTRONIC MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Junhyuk Ahn, Hyung Jin Choi, Junsung Bang, Gayeon Son, Soong Ju Oh
Summary: This paper reports the fabrication of Ag nanocrystal-based multiaxial wearable strain gauge sensors for voice recognition systems. The sensors can be fabricated on an ultrathin substrate using ink-lithography and exhibit high sensitivity and angle dependence. They can detect the voice onset time, distinguishing between voiced and voiceless plosive contrasts, and can contribute to the advancement of wearable sensors, voice recognition, and analysis.
Article
Chemistry, Multidisciplinary
Yoonsu Park, Wooseok Jeong, Junhyuk Ahn, Yun-Kun Hong, Eunseo Hwang, Minyoung Kim, Yun Jae Hwang, Soong Ju Oh, Don-Hyung Ha
Summary: We investigated the mechanism and key factors of electrophoretic deposition of nanoparticles and found that surfactant ligands play an important role in enhancing the adhesion of nanoparticle film structures. The deposition mechanism involves three steps: island formation, lateral growth, and layer-by-layer deposition. The controlled role of surfactant ligands enables the design of high-performance nanostructured nanoparticle film devices with enhanced contact.
Article
Nanoscience & Nanotechnology
Ning Li, Insun Park, Jarrett H. Vella, Soong Ju Oh, Jason D. Azoulay, Dong-Seok Leem, Tse Nga Ng
Summary: This study investigated the broadband spectral response and the transition from photonic to bolometric operation in a series of infrared detectors comprised of organic bulk heterojunctions. It was found that the mid- and long-wave infrared response was attributed to charge trap-and-release processes that affected thermal charge generation and the activation energy of charge mobility. In addition, the study demonstrated that key design parameters such as sub-bandgap characteristics, mobility activation energy, and effective bandgap could control the device temperature coefficient of resistance, outperforming other thin film materials.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Materials Science, Multidisciplinary
Junhyuk Ahn, Byung Ku Jung, Woosik Kim, Yong Min Lee, Junsung Bang, Sang Yeop Lee, Taesung Park, Young Kyun Choi, Jung Ho Bae, Soong Ju Oh
Summary: This study investigates the effect of halide ligands on the formation of a Cs4PbBr6 crystal matrix and reveals their influence on nucleation/growth and carrier transport mechanisms. The research demonstrates that more densely passivated PbSe NCs form a higher-quality CPB matrix and achieves flexible photodetectors with UV/visible/near-infrared activity.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Physical
InYeong Kim, Sang Cheol Park, Young Il Kim, Dae-Kyeom Kim, Kee-Ahn Lee, Soong Ju Oh, Bin Lee
Summary: This study characterized the surface residual stress in AM AlSi10Mg alloy parts using various non-destructive methods, including X-ray diffraction analysis, nanoindentation, and electron channeling contrast imaging. The results showed consistent trends among all the approaches, although there were differences in the results obtained from the W-H plot and nanoindentation methods, which were discussed.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Nanoscience & Nanotechnology
Hyung Jin Choi, Junhyuk Ahn, Byung Ku Jung, Young Kyun Choi, Taesung Park, Junsung Bang, Junhyeok Park, Yoonji Yang, Gayeon Son, Soong Ju Oh
Summary: A highly sensitive and conductive wearable crack-based strain sensor was developed for voice recognition systems, which can gather important physiological information from acoustic data without background noise interference. The sensor exhibited low electrical resistance, ultrahigh sensitivity, and fast response/recovery time. It could detect sound waves at a high frequency with a high signal-to-noise ratio, effectively differentiate between different voice qualities, and successfully detect the laryngeal state and glottal source.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Sung-In Mo, Sungjin Choi, Jeong-Ho An, Bo-Jong Kim, Kwan Hong Min, Sungeun Park, Ji-Eun Hong, Soong Ju Oh, Hee-eun Song, Joon-Ho Oh, Ka-Hyun Kim
Summary: This study investigates the microstructural evolution, dopant in-diffusion, and carrier transport mechanism in the electron and hole contacts of poly-Si/SiOx solar cells. The results demonstrate that the passivation properties and carrier transport mechanisms are strongly influenced by the microstructural evolution and dopant in-diffusion. Electron and hole contacts exhibit common behaviors regarding microstructural evolution and dopant in-diffusion, but hole contacts show relatively inferior electrical properties overall.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Shaurya Arya, Yunrui Jiang, Byung Ku Jung, Yalun Tang, Tse Nga Ng, Soong Ju Oh, Kenji Nomura, Yu-Hwa Lo
Summary: In this study, a compact and easy-to-use model for colloidal quantum dot (CQD) devices is developed. By considering the properties of quantum dots, ligand binding, and the heterointerface between quantum dots and the electron transport layer, the model can accurately describe and optimize the performance of CQD devices.
Article
Chemistry, Multidisciplinary
Young Kyun Choi, Tae Hyuk Kim, Jeong Han Song, Byung Ku Jung, Woosik Kim, Jung Ho Bae, Hyung Jin Choi, Jeonghun Kwak, Jae Won Shim, Soong Ju Oh
Summary: A temperature-insensitive strain sensor was developed by modifying the transport mechanism and temperature coefficient of resistance (TCR) of a PEDOT:PSS thin film through secondary doping with DMSO. The DMSO-doped PEDOT:PSS thin film exhibited band-like transport and maintained resistance with temperature change. The optimized thin film showed a TCR of less than 9 x 10(-5) K-1, 10(2) times lower than the as-prepared films, and improved carrier mobility due to morphological changes caused by DMSO doping.
Article
Nanoscience & Nanotechnology
Junhyuk Ahn, Junsung Bang, Young-Min Kim, Seongkeun Oh, Soo Young Kim, Yun-Mo Sung, Soong Ju Oh
Summary: Metal-halide perovskite-based resistive random-access memory (ReRAM) devices are promising for neuromorphic systems due to their low operation voltage and distinct signal characteristics. However, the high density of defects on the surfaces of nanometer-sized perovskites hinders their resistive switching characteristics. In this study, defects are engineered and the chemical compositions are tuned through water treatment, resulting in successful 0D perovskite-based ReRAM devices with improved performance.
MATERIALS TODAY NANO
(2023)
Article
Chemistry, Physical
Sang Yeop Lee, Hangyu Lim, Jung Ho Bae, Dongwoo Chae, Taejong Paik, Heon Lee, Soong Ju Oh
Summary: This paper presents a self-classifying smart device that can intelligently differentiate and operate different functions including electroluminescence display, ultraviolet light sensor, and thermal management via radiative cooling. By designing specific materials and structure, a spectrum-selective response is achieved without noise or interference. The device exhibits bright blue light emission, green light emission, and radiative cooling, opening up new avenues for device integration in next-generation wearable device fabrication.
NANOSCALE HORIZONS
(2022)
Article
Chemistry, Multidisciplinary
Young Kyun Choi, Taesung Park, Dong Hyun David Lee, Junhyuk Ahn, Yong Hwan Kim, Sanghyun Jeon, Myung Joon Han, Soong Ju Oh
Summary: In this study, an anti-temperature-interference resistive-type strain sensor was designed by modulating the temperature coefficient of resistance (TCR) of metal nanoparticles through hybrid chemical treatment. The sensor showed a very low TCR and high performance for detecting various strains while being immune to temperature changes.
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)
