Article
Chemistry, Multidisciplinary
Ashwin K. Boddeti, Jun Guan, Tyler Sentz, Xitlali Juarez, Ward Newman, Cristian Cortes, Teri W. Odom, Zubin Jacob
Summary: In this experiment, long-range dipole-dipole interactions are achieved through surface lattice resonances in a plasmonic nanoparticle lattice, paving the way for engineering and controlling interactions between ensembles of emitters at room temperature.
Article
Chemistry, Physical
Seo Young Jang, Hye Min Lee, Ju Young Sung, Se Eun Kim, Jae Deock Jeon, Yewon Yun, Sang Mo Moon, Joung Eun Yoo, Ji Hyeon Choi, Tae Joo Park, Sang Woon Lee
Summary: The epitaxial growth of NbN thin film was achieved for the first time using ALD with NbCl5 and NH3 as precursors. The matching lattice structure between NbN and MgO allowed for epitaxial growth with a small lattice mismatch. The Cl impurity concentration in epitaxial NbN thin films was significantly lower compared to those grown on a SiO2 substrate, potentially due to a bond length change induced by a residual strain at the NbN/MgO interface. The epitaxial growth of NbN thin films led to improved crystallinity and a 50% reduction in resistivity.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Celeste L. Melamed, Moira K. Miller, Jacob Cordell, Linda Pucurimay, Alyssa Livingood, Rekha R. Schnepf, Jie Pan, Karen N. Heinselman, Fernando D. Vila, Allison Mis, Dennis Nordlund, Ben Levy-Wendt, Stephan Lany, Eric S. Toberer, Steven T. Christensen, Adele C. Tamboli
Summary: This study demonstrates that short-range ordering can tune the optical absorption edge in the long-range disordered alloy system (ZnSnN2)1-x(ZnO)2x at x=0.25. Using combinatorial cosputtering, a set of thin-film samples spanning this alloy space is synthesized. X-ray diffraction confirms the synthesis of a mixed-anion and -cation alloy. X-ray absorption analysis and spectroscopic ellipsometry reveal that local ordering increases the absorption edge energy at constant composition. This work opens up possibilities for property tuning with short-range ordering in (ZnSnN2)1-x(ZnO)2x and similar materials.
CHEMISTRY OF MATERIALS
(2022)
Article
Chemistry, Physical
Ryuto Horie, Hiroyuki Nishinaka, Daisuke Tahara, Masahiro Yoshimoto
Summary: Alloying γ-Ga2O3 with γ-aluminum oxide effectively achieves lattice-matched growth and band gap engineering, leading to a band gap energy of 5.88 eV. The epitaxial growth of γ-(AlxGa1-x)2O3 on spinel substrates demonstrated limited dislocations and band gap engineering capabilities in the range of 5.0-6.0 eV, showing promise for wide band gap semiconductor applications in power switching devices and deep-ultraviolet optoelectronics.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
K. F. Dong, Y. Y. Jiao, Z. Y. Yuan, C. Sun, K. H. He, F. Jin, W. Q. Mo, J. L. Song
Summary: The study found that crystal structure and lattice mismatch strongly influenced the Gilbert damping constant of NiFe films. Increasing the sputtering temperature led NiFe to transition from amorphous to crystalline, resulting in increased chemical ordering and decreased damping constant. Additionally, an increase in mismatch strain was found to slightly decrease the damping constant, which was further supported by spin resolved density of states analysis.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2021)
Article
Chemistry, Physical
Yiming Shi, Junhua Meng, Jingren Chen, Yanmin Li, Rui Wu, Jinliang Wu, Zhigang Yin, Xingwang Zhang
Summary: Due to good lattice matching and bipolar doping behavior, wide bandgap SrTiO3 (STO) is considered a promising substrate for the heteroepitaxial growth of beta-Ga2O3 to construct (opto-)electronic devices. However, the growth of beta-Ga2O3 film on STO (111) substrate has not been studied extensively. In this work, beta-Ga2O3 (201) thin films were epitaxially grown on STO (111) substrates by low pressure chemical vapor deposition. The impact of source and growth temperatures on the crystal quality and surface roughness of the beta-Ga2O3 films was investigated. The results show that under optimized conditions, the heteroepitaxial beta-Ga2O3 film exhibited narrow X-ray diffraction rocking curve and low surface roughness. Epitaxial growth of beta-Ga2O3 films on STO substrates lays the foundation for future device applications.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Jing Liu, Jinlei Zhang, Zhonghua Zhang, Aobing Du, Shanmu Dong, Zhenfang Zhou, Xiaosong Guo, Qingfu Wang, Zhenjiang Li, Guicun Li, Guanglei Cui
Summary: Epitaxial electrocrystallization of Mg on a three-dimensional magnesiophilic host, achieved through the synergy of a magnesiophilic interface, lattice matching, and electrostatic confinement effects, can significantly improve the cycle life of rechargeable magnesium batteries.
Article
Engineering, Electrical & Electronic
Sandeep Vura, Usman Ul Muazzam, Vishnu Kumar, Sai Charan Vanjari, Rangarajan Muralidharan, Nath Digbijoy, Pavan Nukala, Srinivasan Raghavan
Summary: In this report, direct epitaxial integration of beta-Ga2O3 on a Si(100) substrate is demonstrated, providing opportunities for the development of deep-UV optoelectronics.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
Article
Physics, Applied
L. Nordin, P. Petluru, A. J. Muhowski, E. A. Shaner, D. Wasserman
Summary: This study demonstrates all-epitaxial structures capable of supporting short- and long-range surface plasmon polariton modes in the long-wave infrared region. The epitaxial structures show potential to serve as long-range interconnects or waveguides in plasmonic/optoelectronic systems. Mapping of the SPP dispersion using spectroscopy highlights the applications in the long-wave infrared.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Chemistry, Physical
Shaham Quadir, Mohammad Qorbani, Amr Sabbah, Tai-Sing Wu, Aswin Kumar Anbalagan, Wei-Tin Chen, Suneesh Meledath Valiyaveettil, Ho-Thi Thong, Chin-Wei Wang, Cheng-Ying Chen, Chih-Hao Lee, Kuei-Hsien Chen, Li-Chyong Chen
Summary: Understanding and controlling cation disorder in kesterite-based absorber materials is crucial for improving their photovoltaic performance. This study used neutron diffraction and synchrotron-based X-ray absorption techniques to investigate the relationships among cation disorder, defect concentration, crystallographic order, and atomic-scale structure. The results showed that incorporating silver into the material could reduce the concentration of detrimental defects and maintain the concentration of beneficial defects, thus controlling the defect distribution in the lattice.
CHEMISTRY OF MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Oliver Neyenhuys, Mikhail V. Fistul, Ilya M. Eremin
Summary: This article investigates the vertex-sharing frustrated Kagome lattices of Josephson junctions and identifies various classical and quantum phases. The authors derive an effective Ising-type spin Hamiltonian with strongly anisotropic long-range interaction. They numerically calculate the temperature-dependent spin polarization in the classical regime and analyze the lifting of ground state degeneracy and the appearance of highly entangled states in the quantum regime.
Article
Materials Science, Multidisciplinary
Oliver Neyenhuys, Mikhail V. Fistul, Ilya M. Eremin
Summary: This article theoretically analyzes the geometrically frustrated Kagome lattices of Josephson junctions and identifies various classical and quantum phases. The research findings reveal that under the constraint conditions, highly anisotropic and long-range interactions occur between vortices/antivortices, affecting the transition between the ordered and disordered states of the system.
Article
Physics, Applied
Simran, Santosh Kumar Yadav, Poulab Chakrabarti, Subhabrata Dhar
Summary: This study systematically investigates the growth, structural, electrical, and luminescence properties of zinc oxide (ZnO) layers. It is found that high-quality c-ZnO films can be grown under certain growth conditions. The films have low dislocation densities and high mobility. Photoluminescence studies reveal various luminescence features in the films, which can be minimized by adjusting the growth conditions.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Biotechnology & Applied Microbiology
Kai Zhang, Wen-Fang Cai, Jin-Wen Shi, Qing-Yun Chen
Summary: A cauliflower-shaped p-n CuO/ZnO heterojunction photocathode with lattice matching was synthesized using one-step electrodeposition and heat treatment, achieving a high photocurrent density value. The parallel lattice-matched CuO/ZnO heterojunction enhanced the separation and migration of photogenerated charge carriers.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2022)
Article
Materials Science, Ceramics
Kenta Kaneko, Tomoaki Oga, Satoru Kaneko, Takayoshi Katase, Mamoru Yoshimoto, Akifumi Matsuda
Summary: In this study, heteroepitaxial ZnO(0001) thin films were grown directly on α-Al2O3(0001) substrates at room temperature by laser-molecular beam epitaxy without buffer layers. The epitaxial films were grown on pretreated substrates, while substrates cleaned by hydrochloric acid resulted in uniaxially oriented growth. The ZnO thin films exhibited high transparency in the visible region and low resistivities at room temperature.
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN
(2023)
Article
Materials Science, Multidisciplinary
Fei Chen, Jiaqi Lu, Yang Liu, Hongfei Zhang, Chi Zhang, Qiang Shen
Summary: In this study, NiTi alloys were prepared using laser engineered net shaping (LENS) technology. The mechanical properties and microstructures of NiTi samples under different laser powers were explored, and it was found that NiTi alloys with a laser power of 350 W exhibited better tensile strength (783 MPa) and strain recovery rate (59.01%). Additionally, the mechanical properties and microstructure of NiTi samples with a laser power of 350 W at different aging temperatures were also investigated, revealing that NiTi alloys aged at 600 degrees C had better tensile strength (729 MPa) and strain recovery rate (92.85%). The results also showed that thermal treatment increased the phase-transition temperature and enthalpy of the NiTi samples, leading to the formation of stable martensite (B19 ') within the samples. Overall, this study demonstrates the ability of LENS to produce NiTi alloys with excellent mechanical and structural properties by controlling equipment parameters and aging temperature.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Physics, Applied
Sijun Luo, Lukas Trefflich, Susanne Selle, Ron Hildebrandt, Evgeny Krueger, Stefan Lange, Jingjing Yu, Chris Sturm, Michael Lorenz, Holger Von Wenckstern, Christian Hagendorf, Thomas Hoeche, Marius Grundmann
Summary: This paper reports the heteroepitaxial growth of (00.1)-oriented Zn2GeO4 thin films on c-plane sapphire substrates using pulsed laser deposition. The thin films exhibit [11.0] Zn2GeO4// [11.0] Al2O3 and [1(1) over bar.0] Zn2GeO4//[1(1) over bar.0] Al2O3 in-plane orientation relationships. The measured properties include a rocking curve full width at half maximum of 0.35 degrees, a direct bandgap of 4.9 +/- 0.1 eV, and a defect-related photoluminescence emission centered at 2.62 eV with a FWHM of 0.55 eV. This study enhances our understanding of the physical properties and potential device application of Zn2GeO4 thin films.
APPLIED PHYSICS LETTERS
(2023)
Article
Materials Science, Ceramics
Xuefei Wang, Yuxin Fan, Guoqiang Luo, Rong Tu, Qiang Shen, Lianmeng Zhang
Summary: With the increasing application rate of multilayer ceramic capacitors (MLCCs) in small electronic devices, there is a need for the use of barium titanate (BaTiO3) raw material with small particle size and excellent dielectric properties. In this study, small cubic phase Y-doped BaTiO3 (BYT) nanoparticles were prepared using a hydrothermal method, and highly dielectric tetragonal phase BYT ceramics were prepared based on this method. The results demonstrate that the 50 nm cubic phase BaTiO3 powder can meet the needs of next-generation high-capacity MLCCs, providing a reference for small cubic phase BaTiO3 as a dielectric material for high-capacity MLCCs.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Rong Tu, Jiaojiao Li, Mingpu Jia, Qizhong Li, Meijun Yang, Song Zhang, Takashi Goto
Summary: B4C-CrB2 composites were prepared by arc-melting using B4C and CrB2 powders as raw materials. The eutectic composition of B4C-CrB2 system was 30B(4)C-70CrB(2) (mol%) with a labyrinth-like irregularly layered eutectic microstructure. The composites exhibited maximum Vickers hardness (24.6 GPa) and fracture toughness (4.3 MPa m(1/2)) at room temperature.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2023)
Article
Chemistry, Physical
Guoqiang Luo, Ganrong Zhang, Luo Bai, Ying Zhang, Yuxin Fan, Yuzhe Han, Xiaoping Guo, Meijuan Li, Rong Tu, Qiang Shen
Summary: In this study, high tetragonality BaTiO3 (BT) powder with controllable dispersion and particle size was successfully synthesized using a two-step hydrothermal method and combined dispersants, namely cetyltrimethylammonium bromide (CTAB) and polyvinyl-pyrrolidone (PVP). The synergistic effect of chemical bond force and electrostatic adsorption force between these dispersants at high temperature resulted in the achievement of ultrafine BT powder with high c/a ratio, small size, and low polydispersity index. This approach is of great significance for synthesizing BT powder with high tetragonality, high dispersion, and small particle sizes.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Sarahi Pacheco-Espinoza, Alejandro I. I. Cuesta-Balderas, Jorge Vazquez-Lujano, Abril Rosiles-Aguilera, Maria A. Hernandez-Perez, Felipe Cervantes-Sodi, Fei Chen, Qiang Shen, Rong Tu, Jorge R. R. Vargas-Garcia, Lian-Meng Zhang
Summary: The development of 1D cerium oxide (CeO2) hollow nanostructures has attracted attention for their superior properties and anisotropic geometry. This study reports a novel method to fabricate multiwalled CeO2-delta nanotubes (CeO2-delta NTs) by converting functionalized multiwalled carbon nanotubes (f-MWCNTs) through oxidation and dehydration reactions. The CeO2-delta NTs exhibit a low direct band gap and an unusually high presence of Ce3+ ions and surface O vacancies.
PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION
(2023)
Article
Chemistry, Multidisciplinary
Rong Tu, Xinyu Li, Qingfang Xu, Bao-Wen Li, Tenghua Gao, Xian Zhang, Song Zhang, Takashi Goto, Lianmeng Zhang
Summary: This study reports the first growth of uniquely <010>-oriented ss-Ga2O3 films on quartz substrates by laser chemical vapor deposition (LCVD). The <010> orientation is closely related to the higher stability of oxygen close-packed planes under O-rich condition. The <010>-oriented ss-Ga2O3 film-based MSM type detector exhibits ultra-fast response speed.
Article
Materials Science, Coatings & Films
Qizhong Li, Tao Huang, Mai Yang, Tenghua Gao, Baifeng Ji, Song Zhang, Lianmeng Zhang, Rong Tu
Summary: Hard coatings with gradient and multilayer structures were prepared by high-power pulsed magnetron sputtering. The modulation period was found to significantly affect the microstructure, mechanical, and tribological properties of the coatings. Shorter modulation periods improved the adhesion strength and resulted in higher hardness and lower friction coefficients.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Chemistry, Physical
Wei Yang, Lin Xu, Wen Luo, Ming Li, Ping Hu, Yuhang Dai, Fazhi Ye, Chunhua Han, Minxuan Zhou, Rong Tu, Ji Shi, Liqiang Mai
Summary: In this study, a facile manufacturing process is used to fabricate Zn-MnO2 microbatteries with a 3D macroporous microelectrode, which exhibit easy integration, mass customization, and superior electrochemical performance. The microbatteries achieve ultrahigh capacity and outstanding areal energy density due to the high electron/ion transport path and high mass-loading of the PEDOT-MnO2 film. Additionally, a 3D macroporous PEDOT-MnO2 hybrid film is achieved, which improves the cycling performance without reducing areal capacity or hindering ion diffusion. Therefore, the PEDOT-MnO2//Zn microbatteries hold great potential as a next-generation component for self-powered microelectronic devices.
ADVANCED ENERGY MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Qiang Shen, Dongyu Jiang, Shiyu Cao, Xinqi Lu, Chong Mao, Xiaobing Dai, Fei Chen
Summary: High Li+ conductivity, good interfacial compatibility, and nano-scale particle size are important factors in selecting inorganic fillers for high-performance composite solid electrolytes. In this study, non-milled in situ LLZO fillers were synthesized with nanosize via the sol-gel method, resulting in more surface defects and fewer impurities in LLZO. These fillers effectively reduce the crystallinity of PEO and agglomeration in PEO, leading to composite electrolytes with high Li+ conductivity. Notably, the non-milled LLZO-PEO-based LiFePO4/Li battery exhibits a discharge capacity of about 135.5 mA h g(-1) at 1C and 60°C, with a 99% discharge specific capacity remaining after 100 cycles. Furthermore, nano-sized non-milled LLZO improves the discharge capacity of LiFePO4/Li batteries to 122.1 mA h g(-1) at 0.2C and 30°C.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Shiyu Cao, Fei Chen, Qiang Shen, Lianmeng Zhang
Summary: A dual-coordination mechanism is proposed to construct a high-performance PVDF/LLZO/SN composite solid electrolyte, which combines enhanced electrochemical performance and interfacial compatibility. The composite solid electrolyte enables ASSLBs to operate at high discharge rates and exhibit good long-cycle stability.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Song Zhang, Kaixin Zuo, Pengjian Lu, Qingfang Xu, Meijun Yang, Kai Liu, Rong Tu
Summary: This study investigated the wetting behavior of Al on a highly oriented SiC surface, and found that the contact angle could be controlled from 6° to 153° at a wetting temperature of 1573-1773 K. The obtained contact angle range was larger than that of polycrystalline silicon carbide (9-113°) and single crystal silicon carbide (31-92°). The presence of many dislocations at the Al/SiC interface increased the interfacial energy, resulting in a greater contact angle for Al on the 111-oriented SiC coating surface than on the 110 one.
Article
Chemistry, Physical
Ziwen Pan, Shiyu Cao, Xinqi Lu, Gang Zhang, Qiang Shen, Chong Mao, Xiaobing Dai, Fei Chen
Summary: Tailoring the interface between inorganic solid electrolyte fillers and the polymer electrolyte matrix is crucial for improving the performance of composite solid electrolytes (CPEs). In this study, a wet chemical method was used to convert the insulation layer on the LLZO surface to LiF, resulting in improved electrochemical stability and enhanced Li-ion transport. The CPEs with etched LLZO exhibited increased ionic conductivity and extended electrochemical stable window.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Multidisciplinary
Rong Tu, Kunqiu Leng, Chao Song, Chitengfei Zhang, Yingqiu Zheng, Yuzhe Han, Guoqiang Luo, Song Zhang, Takashi Goto
Summary: High-performance NiO/Ni/C nanosheet catalysts were prepared by liquid-phase pulsed plasma (LPP). The plasma was generated between two nickel electrodes in ethylene glycol (EG) solution by a homemade high-voltage pulse power supply. Hierarchical porous carbon nanosheets were formed by the decomposition of organics in the EG solution under the catalysis of LPP, and spherical Ni/NiO particles were adsorbed on the surface to form the NiO/Ni/C composites. The pore size distribution of the composites could be controlled with different EG concentrations, and the composites with 10 vol% EG concentration showed exceptional OER activity (289.2 mV overpotential at 10 mA cm(-2)).
Article
Materials Science, Coatings & Films
Weilong Gao, Ruizhi Zhang, Jin Wang, Zihao Huang, Zhiguo Li, Yajun Fu, Guoqiang Luo, Rong Tu
Summary: In this study, Al/Ti-RMF with different modulation periods were prepared and integrated into multilayer flyer plates, leading to optimized performance for laser-driven flyers. Experimental and simulation results demonstrate that Al/Ti-RMF with a modulation period of 150 nm exhibits higher flyer velocity and energy coupling efficiency.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2023)
