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PtCu dendroframe octahedrons:Enhancing peroxidase-like activity and antibacterial efficiency through structural evolution

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Nano Research 2025年第1期18卷 100-106页

作者： Ri Feng Jiuyi Hu Liangjun Wang Jiayu Xu Jiajia Li Zeeshan Ahmad Shaohui Zheng Muhammad Farhan Farid Wenjing Liu Faisal Saleem Key Laboratory of Flexible electronics(KLOFE) Institute of Advanced Materials(IAM)and School of Flexible Electronics(Future Technologies)Nanjing Tech UniversityNanjing 211816China

Nanozymes,which possess enzyme-like catalytic activity,are attractive alternatives to natural *** activity is largely dependent on the structure of the ***,challenges remain in optimizing the structure-activity *** work explores the synthesis and utilization of PtCu nanostructures(NSs),focusing on their peroxidase(POD)-like properties and their potential as antibacterial *** developed PtCu dendrites that transform into unique dendroframe octahedrons(DFOs)and subsequently stabilize into solid octahedrons with unusual growth *** intermediate DFO,showed higher POD-like activity in comparison to other shapes of PtCu *** DFOs also have the better ability to consume glutathione,thus enhancing their sterilization ***,we demonstrate the effectiveness of these PtCu DFOs as powerful antibacterial *** work provides valuable information on shape dependent activities of PtCu NSs in the field of biomedicine.

关键词： nanozymes antibacterials peroxidase PtCu dendroframe octahedrons dendrites

Three-dimensional simulation of a Ka-band relativistic Cherenkov source with metal photonic-band-gap structures

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Chinese Physics B 2009年第6期18卷 2452-2458页

作者：高喜杨梓强亓丽梅兰峰史宗君李大治梁正 Research institute of high energy electronics University of Electronic Science and Technology of China institute for Laser Technology

This paper presents a three-dimensional particle-in-cell （PIC） simulation of a Ka-band relativistic Cherenkov source with a slow wave structure （SWS） consisting of metal photonic band gap （PBG） structures. In the simulation, a perfect match layer boundary is employed to absorb passing band modes supported by the PBG lattice with an artificial metal boundary. The simulated axial field distributions in the cross section and surface of the SWS demonstrate that the device operates in the vicinity of the π point of a TM01-1ike mode. The Fourier transformation spectra of the axial fields as functions of time and space show that only a single frequency appears at 36.27 GHz, which is in good agreement with that of the intersection of the dispersion curve with the slow space charge wave generated on the beam. The simulation results demonstrate that the SWS has good mode selectivity.

关键词： Cherenkov source slow wave structure photonic band gap three-dimensional particlein-cell

Theoretical study of wave propagation along the coaxial waveguide filled with moving magnetized plasma

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Chinese Physics B 2010年第10期19卷 339-347页

作者：张雅鑫贾佳刘盛纲鄢扬 Research institute of high energy electronics University of Electronics Science and Technology of China Chengdu University of Information Technology

This paper presents detailed theoretical study on the theory of wave propagation along the coaxial waveguide filled with moving magnetized plasma （CWMMP）. Making use of the Lorentz transformation and the constitutive transformation, Maxwell＇s equations lead to the coupled non-homogeneous differential equations which govern the wave propagation in CWMMP, and then analytical solutions have been obtained. The discussion about the eigenvalues of the waves and detailed studies on the fields are carried out. It finds that the fields of the CWMMP are composed of two parts with different eigenvalues. Numerical calculations show that because of Doppler shift effect, the eigenvalues of the modes in such a case is quite different from those of the CWMMP. And a detailed discussion on the dispersion characteristic of CWMMP is presented.

关键词： moving magnetized plasma dispersion characteristic

Ru/NiMnB spherical cluster pillar for highly proficient green hydrogen electrocatalyst at high current density

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Journal of energy Chemistry 2025年第1期100卷 397-408页

作者： Md Ahasan Habib Shusen Lin Mehedi Hasan Joni Sumiya Akter Dristy Rutuja Mandavkar Jae-Hun Jeong Jihoon Lee Department of Electronic Engineering College of Electronics and Information Kwangwoon University

Advanced OER/HER electrocatalytic alternatives are crucial for the wide adaptation of green hydrogen ***,Ru/NiMnB spherical cluster pillar （SCP）,denoted as Ru/NiMnB,is synthesized using a combination of electro-deposition and hydrothermal *** investigation of Ru doping in the NiMnB matrix revealed significant improvements in electrocatalytic *** Ru/NiMnB SCPs demonstrate superior OER/HER activity with low overpotentials of 150 and 103 mV at 50mA/cm2in 1 M KOH,making them highly competitive with state-of-the-art ***,the Ru/NiMnB SCPs exhibit a low 2-E cell voltage of 2.80 V at ultra-high current density of 2,000 m A/cm2in 1 M KOH,outperforming the standard benchmark electrodes of RuO2||Pt/C,thereby positioning Ru/NiMnB as one of the best bifunctional *** SCPs exhibit exceptional high-current characteristics,stability and corrosion resistance,as evidenced by continuous operation at 1,000 mA/cm2high-current density for over 150 h in 6 M KOH at elevated temperatures under harsh industrial *** a small amount of Ru incorporation significantly enhances the electrocatalytic performances of NiMnB,attributed to increased active sites and improved intrinsic properties such as conductivity,adsorption/desorption capability and reaction ***,Ru/NiMnB SCPs present a promising bi-functional electrode concept for efficient green H2production.

关键词： Advanced electrocatalyst high current Corrosion resistance Industrial requirement

Excitation of Slow Electromagnetic Waves in a Dielectric-Lined Waveguide Having a Thin Annular Plasma Sheet

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Chinese Physics Letters 1998年第5期15卷 354-356页

作者： WU Jian-qiang LIU Sheng-gang institute of high energy electronics University of Electronic Science and Technology of ChinaChengdu 610054

Excitation of slow electromagnetic waves for a configuration,in which a thin annular relativistic electron beam(TAREB)propagates through a cylindrical,dielectric-lined waveguide having a thin,annular plasma sheet at the same radial position as the TAREB,is studied in the presence of an infinite longitudinal guide magnetic *** dispersion equation is derived and directly numerically *** operation frequency and the growth rate of the waves are obtained and discussed.

关键词： waveguide Waveguide annular

Laboratory measurement of radioactivity purification for ^(212)Pb in liquid scintillator

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Chinese Physics C 2016年第9期40卷 120-124页

作者：胡维方建俞伯祥张烜周莉蔡啸孙丽君刘万金王岚吕军光 State Key Laboratory of Particle Detection and electronics (institute of high energy Physics CAS) institute of high energy Physics University of Chinese Academy of Sciences

Liquid scintillator（LS） has been widely used in past and running neutrino experiments, and is expected also to be used in future experiments. Requirements on LS radio-purity have become higher and higher. Water extraction is a powerful method to remove soluble radioactive nuclei, and a mini-extraction station has been constructed. To evaluate the extraction efficiency and optimize the operation parameters, a setup to load radioactivity to LS and a laboratory scale setup to measure radioactivity using the ^212Bi-^212Po-^208Pb cascade decay have been developed. Experience from this laboratory study will be useful for the design of large scale water extraction plants and the optimization of working conditions in the future.

关键词： liquid scintillator radioactive load radioactive measurement cascade decay water extraction

Effect of annealing atmosphere on ferromagnetism in Mn doped ZnO films

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Chinese Physics B 2010年第2期19卷 476-479页

作者：刘兴翀陆智海张凤鸣 institute of high energy electronics School of Physical ElectronicsUniversity of Electronic Science and Technology of China Department of Physics Nanjing University

This paper reports that Zn0.97Mn0.03O thin films have been prepared by radio-frequency sputtering technology followed by rapid thermal processing in nitrogen and oxygen ambient respectively. Magnetic property investigation indicates that the films are ferromagnetic and that the Curie temperature （Tc） is over room temperature. It is observed that the saturation magnetization of the films increases after annealing in nitrogen ambience but decreases after annealing in oxygen. Room temperature photoluminescence spectra indicate that the amount of defects in the films differs after annealing in the different ambiences. This suggests that the ferromagnetism in Zn0.97Mn0.03O films is strongly related to the defects in the films.

关键词： magnetic semiconductor ZnO photoluminescence

Cavity design and linear analysis of 225 GHz frequency-quadrupling gyroklystron

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Chinese Physics B 2009年第7期18卷 3049-3053页

作者：刘頔威袁学松鄢扬刘盛纲 THz Research Center Research Institute of High Energy ElectronicsUniversity of Electronic Science and Technology of China

This paper considers the frequency-quadrupling three-cavity gyroklystrons with successive frequency-doubling in each *** cavities of 225 GHz frequency-quadrupling gyroklystron are designed with the scattering matrices method and the possible operating mode are *** the point-gap theory,the starting currents of the possible operating modes and the potential parasitic modes in the output cavity are calculated. The optimal operating mode is proposed under consideration of the mode competition and the power capacity of the cavity.

关键词： frequency-quadrupling gyroklystron THz scattering matrices point-gap theory

Design and implementation of the detector control system for the BESⅢ drift chamber cosmic ray test

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Chinese Physics C 2008年第8期32卷 649-652页

作者：陈锡辉谢小希李小男高翠山张银鸿聂振东闵建谢一冈 institute of high energy Physics CAS

After the construction of the BESⅢ drift chamber, a long period of cosmic rays test is necessary to verify its performance. This also provides a good opportunity to integrate the detector readout electronics and Detector Control System （DCS） into a unified working system. The goal of the DCS is to guarantee reliable physics data quality and the safe operation of the detector. It monitors and controls the HV, gas, VME crates and the environmental variables. The upper-level system is mainly developed from LabVIEW and the lower-level system mainly uses MCU and PLC technology. The system is designed to be highly flexible and scalable so that it can be applied to other detectors with little or no change. In the immediate future, it will be integrated into the entire BESⅢ Slow Control System.

关键词： Detector Control System drift chamber LabVIEW