Article
Chemistry, Multidisciplinary
Marianna Spankova, Stefan Chromik, Edmund Dobrocka, Lenka Pribusova Slusna, Marcel Talacko, Maros Gregor, Bela Pecz, Antal Koos, Giuseppe Greco, Salvatore Ethan Panasci, Patrick Fiorenza, Fabrizio Roccaforte, Yvon Cordier, Eric Frayssinet, Filippo Giannazzo
Summary: In this paper, few-layer MoS2 films were prepared on single-crystal sapphire and heteroepitaxial GaN templates on sapphire substrates using pulsed laser deposition (PLD) technique. The films exhibited epitaxial growth and uniform thickness. The electrical current transport and current injection behavior of the films were studied and showed high n-type doping and rectifying behavior.
Article
Engineering, Electrical & Electronic
Santosh Kumar Yadav, Subhabrata Dhar
Summary: The study demonstrates that using pulsed laser deposition technique, continuous epitaxial films as thin as 3 nm of NiO can be grown on c-sapphire substrates with high crystalline quality and smooth surface. It also reveals the co-existence of 60 degrees-rotated (111) triangular domains and a very low density of 60 degrees dislocations in the films.
SEMICONDUCTOR SCIENCE AND TECHNOLOGY
(2021)
Article
Physics, Applied
Bhabani Prasad Sahu, Santosh Kumar Yadav, Simran Arora, Subhabrata Dhar
Summary: The incorporation of lithium in (111) NiO epitaxial layers grown using pulsed layer deposition technique on c-sapphire substrates has been studied. The effects of Li inclusion on the structural, morphological, electrical, and optical properties of the films were systematically investigated. It was observed that the concentration of Li in the film was higher at lower growth temperatures, but the crystalline quality decreased. There was a miscibility limit of Li in NiO, and Li clusters were detected in the films beyond a critical Li concentration. Li incorporation resulted in hydrostatic tensile strain in the NiO lattice, leading to a reduction in the bandgap and an improvement in the electrical conductivity of NiO layers. Ni-vacancy defects also played a significant role in controlling the conductivity of these samples.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Chemistry, Physical
M. Nistor, E. Millon, C. Cachoncinlle, C. Ghica, C. Hebert, J. Perriere
Summary: Nd-doped ZnO thin films were deposited using PED under oblique conditions, resulting in smooth, compact films with inclined columnar grains. The films exhibit a unique wurtzite phase with a specific epitaxial relationship with the sapphire substrate.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
A. V. Chernykh, I. V. Malikov, V. A. Berezin, L. A. Fomin
Summary: Iron films were grown on sapphire using pulsed laser deposition, and the percolation transition was precisely determined using in situ electrical resistance control. The morphology of the iron films exhibited four distinct growth stages, depending on the time, deposition rate, and temperature.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Ja-Hon Lin, Tse-Ming Tsai, Yi-Chung Yang, Wei-Rein Liu, Bi-Hsuan Lin, Kasimayan Uma, Yung-Chi Wu, Wen-Feng Hsieh
Summary: High periodicity non-polar ten-pair ZnO/Zn0.8Mg0.2O multiple quantum wells were prepared via pulsed-laser deposition on r-plane sapphire, demonstrating anisotropic optical properties with energy difference between splitting valence bands. The amplified spontaneous emission from the non-polar MQWs showed higher efficiency under perpendicular pump condition, with linearly polarized ASE and dominant ex-ex scattering mechanism. The temperature-dependent ASE revealed red shift in emission peak and a temperature-insensitive characteristic temperature of -124 K.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
E. Dobrocka, M. Spankova, M. Sojkova, S. Chromik
Summary: YBCO thin films were grown on (0001) oriented GaN/c-sapphire substrates with epitaxial alignment, and a qualitative texture model was proposed to explain the measured X-ray pole figures. The analysis revealed three texture components parallel to the (0001) plane of the GaN surface, with six orientation variants due to the six-fold symmetry of the GaN surface. It was shown that a thin MgO interlayer deposited on the GaN/c-sapphire substrate before YBCO growth could suppress the formation of undesirable texture components.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
C-E Bejjit, V. Roge, C. Cachoncinlle, C. Hebert, J. Perriere, E. Briand, E. Millon
Summary: In this study, different FeOx-based thin films were successfully grown using pulsed-laser deposition. The films include metallic iron, α-Fe2O3, Fe3O4, and the thermodynamically metastable phase FeO. The results demonstrate that the O/Fe ratio in the films can be controlled by adjusting the substrate temperature and oxygen pressure.
Article
Physics, Applied
C. Zhu, C. Xu, P. Feng, X. Chen, G. M. de Arriba, J. Bai, T. Wang
Summary: This paper compares the growth and optical properties of InGaN/GaN MQWs grown on silicon substrates and sapphire substrates. It is found that the strain status of GaN has a significant influence on the growth and optical properties of InGaN/GaN MQWs, with significantly longer wavelength emission observed on the silicon substrate. Furthermore, it is revealed that the strain change on the silicon substrate is more sensitive to growth temperature change.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Yuanhao Sun, Fujun Xu, Na Zhang, Jing Lang, Jiaming Wang, Baiyin Liu, Liubing Wang, Nan Xie, Xuzhou Fang, Xiangning Kang, Zhixin Qin, Xuelin Yang, Xinqiang Wang, Weikun Ge, Bo Shen
Summary: By adopting a critical-temperature approach and optimizing growth conditions, AlGaN-based MQWs with an internal quantum efficiency greater than 80% and emission wavelength shorter than 280 nm were successfully grown on nano-patterned sapphire substrates. A deep-ultraviolet light-emitting-diode (DUV-LED) device was fabricated using these high IQE MQWs, achieving a light output power of 17.3 mW at an injection current of 100 mA, demonstrating excellent device performance.
Article
Nanoscience & Nanotechnology
Hasan Yildirim
Summary: Symmetric and asymmetric quantum wells of ZnCdO structures grown on ZnO in non-polar orientations were investigated for their potential in THz emission. Self-consistent solutions of the Schro?dinger and Poisson equations were used to study the effects of Cd concentration on the structures, with possible emission wavelengths between 4.5 and 8.55 THz in step-barrier quantum wells. The importance of many-body effects on intersubband transitions was also discussed.
PHOTONICS AND NANOSTRUCTURES-FUNDAMENTALS AND APPLICATIONS
(2021)
Article
Chemistry, Physical
Shi-Yu Liu, Zong-Yuan Lin, Ye-Ren Chang, Yu-Tso Liao, Po-Hsun Wu, Ssu-Yen Huang, Wen-Chin Lin, Fang-Yuh Lo
Summary: Several studies have shown that rare earth elements can be used to regulate the magnetic anisotropy of garnet films. In this study, rare earth iron garnet (REIG) thin films were fabricated using pulsed laser deposition. The films exhibited different strain and crystal orientation depending on the ionic radius of the rare earth metal ions. The films also showed strong perpendicular magnetic anisotropy and different sensitivities to light at different wavelengths, which could be useful for high-density nano-scale magnetic information storage.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Electrical & Electronic
Santosh Kumar Yadav, Simran Arora, Subhabrata Dhar
Summary: The study explores the effects of growth temperature, time, oxygen partial pressure, and cooling conditions on the structural and electronic properties of In2O3 epitaxial films. It has been observed that the overall strain can transition from compressive to tensile by altering the growth parameters, leading to a systematic variation in the bandgap of the material.
SEMICONDUCTOR SCIENCE AND TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Zewei Chen, Katsuhiko Saito, Tooru Tanaka, Qixin Guo
Summary: High-quality body-centered cubic In2O3 films were grown on a-plane sapphire substrates using pulsed laser deposition. The films exhibited a good crystalline quality, high carrier concentration, and a wide bandgap. The properties of the films were affected by the substrate temperature.
Article
Nanoscience & Nanotechnology
Tanja Jawinski, Chris Sturm, Roland Clausing, Heiko Kempa, Marius Grundmann, Roland Scheer, Holger von Wenckstern
Summary: In this study, indium sulfide (In2S3) thin films were deposited on glass and sapphire substrates by physical co-evaporation. The structural properties of the films were optimized by varying the deposition parameters. The sample grown epitaxially on an α-sapphire substrate exhibited the smoothest surface and highest crystallinity. The optical absorption properties were found to be independent of the deposition parameters and substrate material. Weak and strong absorption onsets were observed at 1.7 eV and 2.5 eV, respectively, which were attributed to direct band-band transitions at 2.1 eV and 2.7 eV. The electrical characterization revealed photovoltaic activity but low performance due to non-ideal heterojunction properties. A strong and persistent photoconductivity was also observed, resulting in a time-dependent dark resistivity after light exposure.
Article
Psychology, Multidisciplinary
Sicheng Xiong, Yi Xu, Bin Zhang, Lihui Zhu, Jianhui Xie
Summary: This study identified three patterns of restrained eating in adolescents and found that these patterns were associated with interpersonal factors such as parental monitoring, deviant peer affiliation, and peer relationships. The results can inform targeted prevention and intervention strategies.
CURRENT PSYCHOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Liping Zhu, Bingyao Wang, Yihan Yan, Shuang Guo, Gangyi Tian
Summary: With the rapid increase in the number of automobiles, traffic accidents are becoming more frequent. This paper proposes three new traffic flow features and extracts them using residual analysis, quadratic discrimination, and multi-resolution wavelet analysis for traffic anomaly detection. Experimental results show that accident identification based on the proposed features is more effective, providing an alternative approach for further applications and studies.
SIGNAL IMAGE AND VIDEO PROCESSING
(2023)
Article
Engineering, Mechanical
Ling Lan, Yue-lan Di, Hai-dou Wang, Yan-fei Huang, Li-na Zhu, Xu-hang Li
Summary: Micro/nanostructures are fabricated on the surface of stainless steel via laser etching, and a superhydrophobic coating with silver nanoparticles is prepared using polydopamine. The effect of soaking time on the reduction of nano-Ag, surface wettability, and antibacterial properties is investigated.
Editorial Material
Multidisciplinary Sciences
Zenghui Xie, Fugui Xie, Limin Zhu, Xin-Jun Liu
Summary: Robotization, miniaturization, and portability are the new development trends in milling equipment for large-scale complex structures. The robotic mobile and mirror milling technology has made remarkable progress in practical production.
NATIONAL SCIENCE REVIEW
(2023)
Article
Cell Biology
Ya-Lan Wei, Yu-Qing Lei, Zhou-Jie Ye, Xu-Dong Zhuang, Li-Ping Zhu, Xin-Rui Wang, Hua Cao
Summary: Bepridil, a commonly used medication for arrhythmia and heart failure, has been found to have toxic effects on rat myocardial cells and zebrafish embryos. The treatment with bepridil resulted in calcium overload, morphological abnormalities, and developmental abnormalities. RNA-seq analysis provided insights into the gene expression profiles and metabolic responses. This study evaluates the use of antiarrhythmic agents in prenatal heart patients.
CELL AND TISSUE RESEARCH
(2023)
Article
Engineering, Environmental
Wei Li, Wei-Liang Jin, Hong-Xin Jiang, Rui Wang, Hao Jia, Jing-Qi Liu, An-Na Tang, Li-Na Zhu, De-Ming Kong
Summary: In this study, a MF@COF composite material was successfully prepared and applied for sample treatment in non-targeted food safety analysis and oil/water separation, showing highly hierarchical pores, strong hydrophobicity, ultralight weight, robust stability, good mechanical elasticity, and processability. Experimental results demonstrated that this composite material can achieve complete removal of chemical hazards from fat-rich foods in 30 seconds, as well as effective separation of oil/water systems.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Manufacturing
Zi-Hui Zhu, Peng Huang, Suet To, Li-Min Zhu, Zhiwei Zhu
Summary: A fast-tool-servo-controlled shear-thickening micropolishing method is proposed for removing undesired surface diffraction on diamond-turned microstructured surfaces. The method allows for controllable material removal by adjusting the gap width and achieves improved surface quality.
INTERNATIONAL JOURNAL OF MACHINE TOOLS & MANUFACTURE
(2023)
Article
Metallurgy & Metallurgical Engineering
Hao-tian Zhu, Hai-rui Guo, Qi-jing Zheng, Chun-yan Guan, Li-ping Zhu, Hai-bin LI, Jin-yu Yang
Summary: Ho3+ and Yb3+ co-doped La7P3O18 up-conversion phosphors were prepared via high-temperature solid-state process. The samples showed a mixture of monoclinic structure La7P3O18 crystals and minor LaPO4 crystals according to XRD analysis. UV-Vis DRS results revealed that La7P3O18 crystal was an indirect semiconductor with an optical band gap of 4.10 eV. Upon excitation at 980 nm, the Ho3+ and Yb3+ co-doped La7P3O18 phosphors exhibited characteristic blue (486 nm), green (550 nm), and red (661 nm) luminescence peaks of Ho3+ ions. The 661 nm peak dominated the up-conversion luminescence spectra. The intensity of up-conversion luminescence initially increased and then decreased with the increase of Ho3+ and Yb3+ doping content. Concentration quenching may occur at Ho3+ and Yb3+ doping contents of 1 at.% and 10 at.%, respectively, through an electric quadrupole-electric quadrupole interaction process. The pumping power dependence of luminescence indicated a two-photon absorption process for the excitation of green and red emissions. The color coordinates of the Ho3+ and Yb3+ co-doped La7P3O18 crystals were located in the orange-red region.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2023)
Article
Chemistry, Multidisciplinary
Shengmiao Sun, Bixuan Wang, Molan Qing, Danbi Tian, Ling Jiang, Liying Zhu
Summary: A modified screen-printed electrode based on ZIF-8, Ag NPs, and ErGO was developed for dopamine detection. The synthesized ErGO/Ag-ZIF-8 composites maintained the structure of ZIF-8. The oxidation current of dopamine increased linearly in the range of 0.1-200 mu M with a detection limit of 0.03 mu M (S/N=3). The sensor exhibited good reproducibility and selectivity, and it was successfully applied for dopamine detection in goat serum with satisfactory recovery range.
Article
Automation & Control Systems
Linlin Li, Wei-Wei Huang, Xiangyuan Wang, Yuan-Liu Chen, LiMin Zhu
Summary: This paper proposes a generalized periodic-disturbance observer (PDOB) to address the issue of repetitive disturbances in automation systems, with an application to a non-minimum phase system. The PDOB is combined with a baseline proportional-integral (PI) controller to achieve real-time cross-coupling suppression. Experimental results show significant improvements in tracking performance and no interference with tracking-based control schemes.
IEEE TRANSACTIONS ON AUTOMATION SCIENCE AND ENGINEERING
(2023)
Article
Automation & Control Systems
Yan-Ning Fang, Xiaonan Pu, Suet To, Bernard Hon, Li-Min Zhu, Zhiwei Zhu
Summary: To overcome the limitations of current piezo-actuated triaxial fast tool servos (FTSs), a novel normal-stressed electromagnetic triaxial FTS with a compact structure and high resonant frequency is proposed. It achieves triaxial motions in the range of hundreds of micrometers and utilizes a single armature for decoupled and noncontact driving forces. The prototype of the triaxial FTS shows excellent agreement with the design target in terms of static and dynamic performances. The system is further enhanced with a linear active disturbance rejection control and an iterative learning scheme for fast and accurate trajectory tracking. By fabricating a hexagonal spherical microlens array, the triaxial FTS demonstrates its capability with a high level of spatial accuracy and good surface quality.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Engineering, Manufacturing
ZaoZao Chen, JunNan Chen, Zhe Zhang, XinQuan Zhang, LiMin Zhu
Summary: To address the low efficiency and cutting tool interference issues in machining high aspect ratio surfaces or complex microstructures with existing diamond turning techniques, a novel method is proposed by introducing two additional rotational motions into the traditional ultra-precision machine tool. This allows for arbitrary adjustment of the tool posture during the machining process and enables efficient machining of intricate microstructures, such as monolithic microstructural optics, using the side cutting edge. The mechanical system, machining principle, tool path planning, compensation for tool tip offset, fabrication and inspection of a partially overlapping Fresnel lens array, as well as the analysis of measurement data, are presented to validate the successful fabrication of such complex microstructures with high profile accuracy and surface quality.
JOURNAL OF MANUFACTURING PROCESSES
(2023)
Article
Chemistry, Physical
Peng Jia, Yunna Guo, Dongliang Chen, Jingming Yao, Xuedong Zhang, Jianguo Lu, Yuqing Qiao, Liqiang Zhang
Summary: Li-CO2/O-2 batteries are a promising energy storage technology that not only provide ultrahigh discharge capacity but also capture CO2 and convert it into renewable energy. This study used copper selenide nanosheets as the air cathode medium to investigate the electrochemical behavior of Li-CO2/O-2, Li-O-2, and Li-CO2 batteries. The research offers insights into the potential development of high-performance Li-CO2/O-2 batteries for energy storage applications.
Article
Engineering, Electrical & Electronic
Wenze Zhang, Weiwei Huang, Yijun Shen, Yaqi Zhang, Limin Zhu, Yang Zhang
Summary: Five-axis sweep scanning is an emerging surface inspection technology that efficiently detects complex surfaces. Existing methods rely on CAD models, making them unsuitable for measuring deformed surfaces. To address this, an adaptive approach with real-time path planning is proposed, eliminating the need for CAD models. The approach utilizes accurate surface prediction and efficient path planning, confirmed through experiments on complex free-form surfaces.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Biotechnology & Applied Microbiology
Shengmiao Sun, Bowen Shen, Ling Jiang, Liying Zhu
Summary: This study investigated the potential of Deinococcus wulumuqiensis R12 as a bioadsorbent for Cr(VI) removal. The optimal conditions for maximum Cr removal efficiency were found to be pH 7.0, 24 h contact time, and 7 mg l(-1) initial Cr concentration. Characterization of bacterial cells revealed that Cr was adsorbed to the surface through functional groups. D. wulumuqiensis R12 showed a high adsorption capacity for Cr(VI) and maintained its viability and metabolic activity even in the presence of Cr.
JOURNAL OF APPLIED MICROBIOLOGY
(2023)
