Article
Nanoscience & Nanotechnology
T. Van Tran, M. J. Ahemad, D. -S. Kim, T. D. Le, V. Dao, Y. -T. Yu
Summary: Pd@Au@ZnO core-double shell nanoparticles (CDS-NPs) with an added Au shell layer between the Pd core and ZnO shell were fabricated to improve the response and selectivity to hydrogen gas. After calcination, the Pd core becomes a gradient composition Pd-Au alloy, resulting in higher response and selectivity.
MATERIALS TODAY NANO
(2023)
Article
Chemistry, Physical
Vamakshi Yadav, Soojin Jeong, Xingchen Ye, Christina W. Li
Summary: In this study, the extent of galvanic replacement reactions between Ag-0 nanoparticles and Pd, Pt, and Au ions was tuned through tailored complexation of metal cations with organic amine and phosphine ligands. This synthetic method serves as a general strategy to synthesize bimetallic Ag@AgM or Ag@M (M = Pd, Pt, Au) core-shell nanoparticles and exhibits good mass-activity in the electrocatalytic hydrogen evolution reaction.
CHEMISTRY OF MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Hamed Akbarzadeh, Esmat Mehrjouei, Mohsen Abbaspour, Sirous Salemi, Hamzeh Yaghoubi, Maliheh Kamrani
Summary: This study compared the thermal stability of Au-Pt-Pd trimetallic nanoparticles with different configurations using molecular dynamics simulation. The results showed that the thermal stability varied among nanoparticles with different configurations, with three-shell, random-alloy, and core-shell structures exhibiting higher thermal stability, while the dumbbell-like structure showed lower thermal stability.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Yuyu Chen, Xiaobing Zeng, Yawen Liu, Rongkai Ye, Qianwei Liang, Jianqiang Hu
Summary: The study achieved structure transformation between Au-Pd alloy and core-shell icosahedral nanoparticles through a one-step aqueous-phase strategy, providing a way to modulate Pd's electronic structure and enhance its electrocatalytic ability towards the hydrogen evolution reaction.
CHEMICAL COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Jia-Jun Qiu, Ting-Ting Yang, Yi-Fan Li, Wen-Hao Qian, Xuan-Yong Liu
Summary: Au@Ag@Pt core-shell nanorods with noble metal combination were fabricated and assembled on medical titanium surface to investigate their antibacterial activity and biocompatibility. The Pt shell layer on Ti-Au@Ag@Pt was found to slow down the Ag ion release rate, which endowed the medical titanium surface with both antibacterial activity and good biocompatibility without obvious cell toxicity. The antibacterial rates of Ti-Au@Ag@Pt against S. epidermidis and P. aeruginosa were 89.7% and 92.7%, respectively.
Article
Chemistry, Multidisciplinary
Gauravjyoti D. Kalita, Podma P. Sarmah, Golap Kalita, Pankaj Das
Summary: A facile ligand-assisted approach was used to synthesize bimetallic Au-Pd nanoparticles with a tunable core@shell structure. The Au-Pd materials exhibited superior performance in two important reactions, with the Pd-core-Au-shell structure showing higher activity compared to the Au-core-Pd-shell structure.
NANOSCALE ADVANCES
(2021)
Article
Chemistry, Multidisciplinary
Sung-Hyuk Sunwoo, Sang Ihn Han, Dongjun Jung, Minseong Kim, Seonghyeon Nam, Hyunjin Lee, Suji Choi, Hyejeong Kang, Ye Seul Cho, Da-Hae Yeom, Myung-Jin Cha, Seunghwan Lee, Seung-Pyo Lee, Taeghwan Hyeon, Dae-Hyeong Kim
Summary: This research presents a material strategy for the development of a stretchable conductive nanocomposite with high conductivity, stretchability, low cytotoxicity, and low impedance. The combination of silver-gold-platinum core-shell-shell nanowires and in situ synthesized platinum nanoparticles contributes to the desired material characteristics. The highly embossed structure of the outermost Pt shell and the gold-platinum double-layer sheath prevent leaching of cytotoxic Ag ions and minimize impedance, while the homogeneously dispersed Pt NPs enhance conductivity, reduce impedance, and improve stretchability.
Article
Chemistry, Multidisciplinary
Bowen He, Xi Liu, Liwei Chen
Summary: By using advanced transmission electron microscope techniques, two alternative particle attachment growth pathways dominating the growth of Au@Ag core-shell nanocuboids are directly observed. One pathway involves the in situ reduction of AgCl nanoparticles attached to Au nanorods and the subsequent epitaxial growth of the Ag shell. The other pathway involves the adherence of Ag-AgCl Janus nanoparticles to Au nanorods with random orientations, followed by nanoparticle redispersion and the resulting formation of epitaxial Ag shells on the Au nanorods. The particle-mediated growth of Ag shells is accompanied by the redispersion of surface atoms, tending to form a uniform structure, providing a new mechanistic understanding of core-shell nanostructure synthesis.
Article
Materials Science, Multidisciplinary
Min Yang, Yan Gong, Genli Shen, Zhen Wang, Mi Liu, Qi Wang
Summary: By synthesizing and comparing the gas sensing properties of Au@ZnO, Au-Pd@ZnO, and Au-Pt@ZnO nanoparticles, it was found that the Pt/Pd decorated Au-ZnO hetero-interface has a positive influence on benzene sensing performance.
Article
Chemistry, Analytical
Shuyun Bi, Rui Zhao, Yue Yuan, Xu Li, Di Shao
Summary: A new SERS method for detecting amprolium HCl was established on a gold core and silver shell substrate, producing sharp Raman signal enhancement. The method showed a good linear relationship and a LOD of 0.48 nmol L-1 after optimization.
MICROCHEMICAL JOURNAL
(2021)
Article
Nanoscience & Nanotechnology
Yinan Fan, Adrien Girard, Michael Waals, Caroline Salzemann, Alexa Courty
Summary: Bimetallic core-shell nanoparticles composed of silver and platinum were synthesized and their optical properties were studied through UV-visible absorption spectroscopy and calculations. The particles showed higher catalytic activity compared to monometallic silver and platinum nanoparticles in the reduction of 4-nitrophenol. This study highlights the potential of these bimetallic core-shell nanoparticles in plasmonic catalysis.
ACS APPLIED NANO MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Yuan Zhang, Baojun Wang, Maohong Fan, Lixia Ling, Riguang Zhang
Summary: In this study, a strategy to improve the catalytic performance of Pt-Sn alloy catalysts in ethane dehydrogenation (EDH) is proposed by engineering the shell surface structure and thickness. Density functional theory (DFT) calculations and kinetic Monte Carlo (kMC) simulations are used to understand the influences of catalyst surface structure, temperature, and reactant partial pressures. The results demonstrate that Pt@Pt3Sn catalysts generally have higher C2H4(g) activity and lower selectivity compared to Pt3Sn@Pt catalysts, due to their unique surface geometrical and electronic properties.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Electrical & Electronic
Ajay P. Manuel, Saralyn Riddell, Harshitha Rajashekhar, Damini Vrushabendrakumar, Kazi M. Alam, Pawan Kumar, Sergey Gusarov, Alexander E. Kobryn, Mustafa Supur, Richard L. McCreery, Karthik Shankar
Summary: Core-shell Au@Pt nanoislands were fabricated on glass substrates using magnetron sputtering and thermal annealing. Addition of ultrathin Pt shells caused redshift and broadening of the localized surface plasmon resonance peak of Au. The coated Au@Pt nanoislands showed superior methylene blue degradation performance and hot carrier injection was validated by Raman thermometry studies.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Physical
E. Shiju, T. Abhijith, Narayana D. Rao, K. Chandrasekharan
Summary: Core-shell structures with tunable multifunctional properties have been studied for their nonlinear optical behavior, showing enhanced optical limiting activity and negative nonlinearity with increasing shell thickness.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Materials Science, Multidisciplinary
Qi Xue, Zixin Ge, Zihan Yuan, Jiangtao Huang, Bin He, Yu Chen
Summary: A one-dimensional Au core@AuPt0.20Rh0.08 alloy shell nanowires (Au@AuPt0.20Rh0.08 CS-NWs) with long aspect ratio and cross-linked network architecture were synthesized, showing excellent electrocatalytic performance for ethanol oxidation reaction. The trimetallic synergistic effect between Au, Pt, and Rh atoms was responsible for the higher peak current density, better resistance to CO poisoning, and more lasting stability of Au@AuPt0.20Rh0.08 CS-NWs compared with Au@AuPt0.28CS-NWs and commercial Pt black electrocatalyst.
MATERIALS TODAY PHYSICS
(2023)
Article
Nanoscience & Nanotechnology
Di Xie, Zongyang Lyu, Yuan Li, Peter K. Liaw, Huck Beng Chew, Yang Ren, Yan Chen, Ke An, Yanfei Gao
Summary: This study examines the microscopic deformation mechanisms of an extruded, precipitation-strengthened AZ80 magnesium alloy under strain-controlled low-cycle fatigue using in situ neutron diffraction measurements. The results show that plastic deformation is primarily controlled by alternating {10.2} extension twinning and detwinning mechanisms. The complex evolution of dominant deformation mechanisms in this alloy is influenced by initial texture, precipitation strengthening, and load sharing of different grain families and phases, with elevated dislocation activities believed to contribute to its relatively poor low-cycle fatigue lifetime compared to other magnesium alloys.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Chemistry, Physical
Jiheon Jun, Yong Chae Lim, Yuan Li, Charles David Warren, Zhili Feng
Summary: The study shows that the use of polymer insulation can effectively mitigate galvanic corrosion at bolted joints between magnesium alloy and carbon fiber-reinforced composite, resulting in reduced corrosion depth and volume. In the polymer-insulated group, the reduction in joint strength post-corrosion was relatively small, while in the non-insulated group it was significantly greater.
Article
Metallurgy & Metallurgical Engineering
Yong Chae Lim, Jiheon Jun, Donovan N. Leonard, Yuan Li, Jian Chen, Michael P. Brady, Zhili Feng
Summary: A new testing methodology was developed to study galvanic corrosion of AZ31B and thermoset carbon-fiber-reinforced polymer. The results showed that massive galvanic corrosion of AZ31B occurred over time, with the corrosion current significantly higher than that of AZ31B without galvanic coupling. The mechanical joint integrity of the corroded joints was retained to a certain extent, but decreased due to the massive volume loss of AZ31B.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Chemistry, Multidisciplinary
Hailong Li, Margarita Kruteva, Martin Dulle, Zhen Wang, Katarzyna Mystek, Wenhai Ji, Torbjorn Pettersson, Lars Wagberg
Summary: This study investigates the drying behavior of regenerated cellulose gel beads swollen with different nonsolvents on both macroscopic and nanoscale. Depending on the cellulose concentration, the structural evolution of the beads during drying can be classified into three distinct regimes.
Article
Chemistry, Physical
Chaoqi Wang, Rui Wang, Zhongyuan Huang, Mihai Chu, Wenhai Ji, Ziwei Chen, Taolue Zhang, Jingjun Zhai, Huaile Lu, Sihao Deng, Jie Chen, Lunhua He, Tianjiao Liang, Fangwei Wang, Jun Wang, Yonghong Deng, Weihua Cai, Yinguo Xiao
Summary: Utilizing in operando neutron diffraction technique, structural characteristics and lithium ion migration pathways of electrodes in LiNi0.5Co0.2Mn0.3O2 /Graphite full cell were revealed. The competition effect between delithiation and magnetic frustration affects the concentration of Li/Ni antisite defects in the cathode, while lithium ions diffuse via different hopping paths in different stages of charge. The study provides insights for designing an optimized pathway for achieving high-performance Li-ion batteries.
ENERGY STORAGE MATERIALS
(2022)
Article
Chemistry, Physical
Jingjun Zhai, Haocheng Ji, Wenhai Ji, Rui Wang, Zhongyuan Huang, Tingting Yang, Chaoqi Wang, Taolve Zhang, Ziwei Chen, Wenguang Zhao, Akhil Tayal, Lei Jin, Jun Wang, Yinguo Xiao
Summary: Layered transition metal oxides have great potential as cathodes for sodium-ion batteries, but single-phase oxides often have unsatisfactory overall performances. By constructing a P2/O3 biphasic structure through Ti substitution, a layered cathode with improved rate capability and cycling stability was achieved. The presence of the intergrowth structure facilitated a reversible phase transition process, leading to enhanced electrochemical performances.
MATERIALS TODAY ENERGY
(2022)
Article
Engineering, Industrial
Suhong Zhang, Yuan Li, Alan Frederick, Yanli Wang, Yiyu Wang, Lawrence Allard Jr, Michael Koehler, Seungha Shin, Anming Hu, Zhili Feng
Summary: In this study, bulk aluminum 7075 alloy strengthened by nano-sized Al-Ni intermetallic particles was successfully synthesized through friction stir processing (FSP). The FSP method promotes the formation of Al3Ni nano particles in-situ through the reaction and inter-diffusion between the aluminum and nickel powders. The presence of these particles significantly increases the micro hardness and modifies the precipitation behavior of the alloy during heat treatment.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2023)
Article
Chemistry, Physical
Taolve Zhang, Haocheng Ji, Xiaohui Hou, Wenhai Ji, Hui Fang, Zhongyuan Huang, Guojie Chen, Tingting Yang, Mihai Chu, Shenyang Xu, Ziwei Chen, Chaoqi Wang, Wenyun Yang, Jinbo Yang, Xiaobai Ma, Kai Sun, Dongfeng Chen, Mingming Tao, Yong Yang, Jiaxin Zheng, Feng Pan, Yinguo Xiao
Summary: The arrangement of Na+ in layered cathode materials has been adjusted through a combination approach, resulting in outstanding rate performance, smooth kinetic process, and excellent cycling performance. This study sheds light on the role of different Na sites and provides a universal and practical approach to adjusting the distribution of Na+ in P2-type cathode materials.
Article
Metallurgy & Metallurgical Engineering
Yuan Li, Yong Chae Lim, Jian Chen, Jiheon Jun, Zhili Feng
Summary: This study investigates the effects of different steel rivet shank sizes on the performance of carbon fiber reinforced polymer (CFRP) and AZ31B Mg alloy joints joined by friction self-piercing riveting (F-SPR). The results show that the lap shear fracture load and mechanical interlock distance increase with the increase of rivet shank size. Ultrafine grains are formed at the joint in AZ31B, resulting in higher hardness. In terms of fatigue life, the CFRP-AZ31B joint performs better at higher peak loads (>2 kN) and is comparable to resistance spot welding of AZ31B to AZ31B at lower peak loads (<1 kN).
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Engineering, Environmental
Ziwei Chen, Maolin Yang, Zhongyuan Huang, Yanda Fu, Zhefeng Chen, Simo Li, Minzhi Zhan, Rui Wang, Mihai Chu, Rui Qi, Xing Cheng, Zhewen Ma, Guojie Chen, Taolve Zhang, Jingjun Zhai, Shenyang Xu, Man Zhang, Jun Wang, Wenhai Ji, Shunning Li, Feng Pan, Wen Yin, Yinguo Xiao
Summary: This study developed a cobalt-doped Na2RuO3 cathode, which exhibited high capacity, excellent rate performance, and good capacity retention. The cobalt doping strategy accelerated the anionic kinetics and enhanced the anionic redox activity.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Chemistry, Inorganic & Nuclear
Li-Ming Wang, Lei Cao, Wen-Hai Ji, Rong Du, Ming Tang, Sheng-Lan Chen, Li-Li Yan, Yinguo Xiao, Jun-Rong Zhang
Summary: In recent decades, the development of new organic materials has led to a rapid increase in the high-power conversion efficiency of photovoltaic cells. Understanding the structure and dynamics of these materials is crucial for designing low-cost photovoltaic cells with superior performance. Neutron scattering techniques, such as neutron reflectivity, small angle neutron scattering, grazing incidence small angle neutron scattering, and quasi-elastic neutron scattering, provide unique and non-destructive information for studying organic photovoltaic materials.
CHINESE JOURNAL OF STRUCTURAL CHEMISTRY
(2023)
Article
Multidisciplinary Sciences
Haocheng Ji, Wenhai Ji, Haoyu Xue, Guojie Chen, Rui Qi, Zhongyuan Huang, Hui Fang, Mihai Chu, Lele Liu, Zhewen Ma, Shenyang Xu, Jingjun Zhai, Wen Zeng, Christian Schulz, Deniz Wong, Huaican Chen, Juping Xu, Wen Yin, Feng Pan, Yinguo Xiao
Summary: Sodium-ion batteries (SIBs) have gained significant attention as a potential substitute for lithium-ion batteries due to their cost, safety, and sustainability advantages. However, improving the energy density of cathode materials in SIBs remains challenging and requires the activation of anion redox reaction (ARR) for additional capacity.
Article
Chemistry, Multidisciplinary
Hui Fang, Haocheng Ji, Jingjun Zhai, Chaoqi Wang, Chen Zhu, Guojie Chen, Mihai Chu, Taolve Zhang, Zhewen Ma, Wenguang Zhao, Wenhai Ji, Yinguo Xiao
Summary: B3+ ion doping in Na0.67Fe0.5Mn0.5O2 improves electrochemical performance by mitigating Jahn-Teller distortion and P2-P2' phase transformation, resulting in stable transition metal layers and suppressed dissolution. Na0.67Fe0.5Mn0.5B0.04O2 exhibits excellent cycling performance and rate performance due to enhanced diffusion kinetics. This work provides insight into the action mechanism of interstitial site doping and offers a universal approach to enhance the electrochemical properties of P2-type manganese-based sodium cathode materials.
Article
Nanoscience & Nanotechnology
Guojie Chen, Haocheng Ji, Hui Fang, Jingjun Zhai, Zhewen Ma, Wenhai Ji, Yinchao Wang, Yuxiang Huang, Lele Liu, Wenxin Tong, Wen Zeng, Yinguo Xiao
Summary: Sodium-ion batteries (SIBs) have attracted attention as a low-cost alternative to lithium-ion batteries, but achieving high capacity and long cyclability in cathode materials is challenging. This study applies a dual modification strategy of morphology control and element doping to enhance the structure and properties of P3-type Na0.67Ni0.33Mn0.67O2 cathodes. The modified Na0.67Ni0.26Cu0.07Mn0.67O2 cathode with a hollow porous microrod structure exhibits excellent reversible capacity and cyclability. The specific morphology reduces the Na+ diffusion pathway and releases stress, resulting in high rate performance and long cycling stability. Cu doping at the Ni site reduces the Na+ diffusion energy barrier and mitigates unfavorable phase transitions. This work demonstrates the significant improvement of P3-type cathode performance through a dual modification strategy for high-performance SIBs.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Wenhai Ji, Zhongyuan Huang, Emmanuel Kentzinger, Ulrich Ruecker, Thomas Brueckel, Yinguo Xiao
Summary: The research demonstrates that hybrid nanocomposites containing various morphologies of well-ordered nanoparticles can be easily obtained by adjusting the nanoparticle concentration in block copolymer-based nanocomposites. The structural evolution of the nanocomposite thin films as a function of nanoparticle loading is revealed using grazing-incidence transmission small-angle X-ray scattering and atomic force microscopy.