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Production of P_(cs)(4459) fromΞ_(b) Decay

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Chinese Physics Letters 2021年第7期38卷 23-28页

作者： Qi Wu Dian-Yong Chen Ran Ji School of Physics Southeast UniversityNanjing 210094China Research School of Physics Australian National UniversityCanberra 2601Australia

Inspired by the P_(cs)(4459)reported by the LHCb collaboration recently,we investigate the P_(cs)(4459)production from Ξ_(b) decay in a molecular scenario using an effective Lagrangian *** different JP assignments to P_(cs)(4459),the magnitude of branching fractions of Ξ_(b)→P_(cs)(4459)K is estimated,which is of the order of 10−*** with the decay properties of P_(cs)(4459),the present estimations could be further testified by precise measurements and contribute to a better understanding of the molecular interpretations and the exploration of JP quantum numbers of P_(cs)(4459).

关键词： decay precise branching

Research and optimization of the ESD response characteristic in a ps-LDMOS transistor

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Journal of Semiconductors 2014年第1期35卷 70-73页

作者：王昊刘斯扬孙伟锋黄婷婷 National ASIC System Engineering Research Center Southeast University

The ESD response characteristic in a p-type symmetric lateral DMOS （ps-LDMOS） has been investigated. The experimental results show that the ps-LDMOS has weak ESD robustness due to an absence of the ＂snapback＂ characteristic. In addition, the location of the hot spot changes little for the special device. The method for reducing the lattice temperature of the hot spot can be used to enhance the ESD capacity of the ps-LDMOS, thereby, a novel and easily-achievable ps-LDMOS structure with a p-type lightly doped drain （p-LDD） has been proposed. The special region p-LDD lowers the electric field at the edge of the poly gate, making the whole dis- tribution of the surface electric field more uniform. Therefore, the ESD robustness is improved two times and no obvious change of other electric parameters is introduced.

关键词： ESD response characteristic ESD robustness ps-LDMOS p-LDD

Fabrication of Large-Area Field Emission Arrays by Bonding Technology

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Chinese science Bulletin 1993年第22期38卷 1866-1869页

作者：黄庆安向涛秦明陈军宁张会珍童勤义 Microelectronic Center Southeast University Nanjing 210018 PRC

1 Introduction The recent development of vacuum microelectronics has received much attention. Vacuum microelectronic devices combine the vacuum transport of electrons with the microfabrication in the IC industry, and show a prospect of wide applications. If the devices can operate at moderate voltages, the electric field of about 1×10~7 V/cm is required. Sharp cathodes have to be fabricated so as to intensify the electric field near cathodes under a voltage. It is obvious that the fabrication of sharp cathodes is one of the

关键词： vacuum microelectronics cathode fabrication bonding.

Thermal characteristics investigation of high voltage grounded gate-LDMOS under ESD stress conditions

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Journal of Semiconductors 2009年第10期30卷 43-45页

作者：孙伟锋钱钦松王雯易扬波 National ASIC System Engineering Research Center Southeast University

The thermal characteristics of high voltage gg-LDMOS under ESD stress conditions are investigated in detail based on the Sentaurus process and device *** total heat and lattice temperature distributions along the Si–SiO2 interface under different stress conditions are presented and the physical mechanisms are discussed in *** influence of structure parameters on peak lattice temperature is also discussed,which is useful for designers to optimize the parameters of LDMSO for better ESD performance.

关键词： thermal characteristic gg-LDMOS ESD stress condition

A sub-circuit MOSFET model with a wide temperature range including cryogenic temperature

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Journal of Semiconductors 2011年第6期32卷 27-32页

作者：贾侃孙伟锋时龙兴 National ASIC System Engineering Research Center Southeast University

A sub-circuit SPICE model of a MOSFET for low temperature operation is *** resistors are introduced for the freeze-out effect,and the explicit behavioral models are developed for *** model can be used in a wide temper... 详细信息

关键词： SPICE model low temperature sub-circuit freeze-out effect voltage control resistor

Tofu-inspired microcarriers from droplet microfluidics for drug delivery

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science China Chemistry 2019年第1期62卷 87-94页

作者： Han Zhang Yuxiao Liu Jie Wang Changmin Shao Yuanjin Zhao State Key Laboratory of Bioelectronics School of Biological Science and Medical Engineering Southeast University

Microcarriers have attracted increasing interests in drug delivery. In order to develop this technique, it is prone to focus on the generation of functional particles through using simple approaches and novel but accessible materials. Here, inspired by the formation mechanism of tofu that through the mixing of soymilk and brine for cross-linking soybean proteins, we present novel soybean protein microcarriers by using microfluidic generation approach for drug delivery. Since the soybean protein droplets are generated by microfluidic emulsification method, the tofu microparticles present highly monodisperse and homogeneous morphologies. Because of the excellent biocompatibility of the soybean protein and the interconnected porous structures throughout the whole microparticles after freeze-drying, various kinds of drugs and active molecules could be absorbed and loaded in the microcarriers, which makes them versatile for drug delivery. It can be anticipated that the microfluidic-generated tofu microcarriers will have great potential in the biomedical field.

关键词： tofu microfluidics microcarrier drug delivery particle droplet

Bio-inspired slippery surfaces with multifunctional anti-icing performance

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science China(Technological sciences) 2021年第10期64卷 2110-2118页

作者： MIAO ShuangShuang WANG Yu ZHAO YuanJin CHEN YongPing Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education School of Energy and EnvironmentSoutheast UniversityNanjing 210096China State Key Laboratory of Bioelectronics School of Biological Science and Medical EngineeringSoutheast UniversityNanjing 210096China Jiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application School of Environmental Science and EngineeringSuzhou University of Science and TechnologySuzhou 215009China

Superior anti-icing and active deicing multifunctional surfaces are highly desired in outdoor infrastructure and work of aircraft,automobiles,wind turbines,power transmission,***,inspired by microstructures and functions of natural opal and Nepenthes pitcher plants,we present a novel multifunctional inverse opal slippery anti-icing surface(IOSAS)by employing a combined method of colloidal nanoparticles self-assembly,microstructure mold replication,and hydrophobic lubricating fluid *** of the 3D long range ordered nanoscale porous structure of artificial inverse opal,the lubricating liquid could wick into,wet,and stably adhere to IOSAS,forming thousands of solid-liquid interfaces and defect-free and inert slippery ***,the IOSAS was imparted with inhibiting ice nucleation property and hindering heat transfer and ice crystals’growth *** to the existence of a thin liquid layer on the surface,the mechanical interlock between porous substrate and ice is greatly weakened,which imparts the slippery surface with low ice adhesion strength,and the frozen droplet and ice bulk could be easily *** addition,we have demonstrated that the supercooled IOSAS has no adhesion to moving water droplets,while various subcooled metal surfaces are adhesive,and this exhibits liquid-infused inverse opal surfaces dynamic low-temperature water-repellent *** characteristics endow IOSAS with multifunctional anti-icing performances,making it a promising option for a wide range of ice-phobic applications.

关键词： bio-inspired wettability anti-icing inverse opal slippery

Strain-Rate-Dependent In-Plane Compressive Properties of 3D Fine Weave Pierced C/C Composite:Failure Mechanism and Constitutive Model

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Acta Mechanica Solida Sinica 2022年第1期35卷 63-78页

作者： Fei Guo Qingguo Fei Yanbin LiL Nikhil Gupta Jiangsu Engineering Research Center of Aerospace Machinery Southeast UniversityNanjing 211189China Department of Engineering Mechanics Southeast UniversityNanjing 211189China School of Mechanical Engineering Southeast UniversityNanjing 211189China Composite Materials and Mechanics Laboratory Department of Mechanical and Aerospace EngineeringTandon School of EngineeringNew York UniversityBrooklynNY 11201USA

In-plane compression experiments are performed on 3D fine weave pierced C/C composite at a wide strain rate range of 0.0001/s-1000/*** in-plane compressive failure mechanism of the composite at quasi-static and high strain rates is analyzed by a scanning electron *** results show that the in-plane compressive modulus,maximum stress and the corresponding strain increase with increasing strain *** quasi-static in-plane compressive failure mode of the 3D fine weave pierced C/C composite is characterized by the shear failure at the angle of 45°and the local buckling of the^direction fiber *** comparison,the high strain rate in-plane compression failure mode of the composite is characterized by the compressive fracture of the interlaminar matrix and the progressive compression failure of the a>direction fiber bundles.A strain-rate-dependent in-plane compressive constitutive model is proposed to predict the dynamic in-plane compressive response of the *** proposed constitutive model is verified by experimental data.

关键词： C/C composite Compression Failure mechanism Constitutive model

Equilibrium charge and triboelectric coefficient of spheres in a rotating container

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Particuology 2022年第4期20卷 103-111页

作者： Jiawei Hu Cai Liang Qun Zhou Jiliang Ma Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education School of Energy and EnvironmentSoutheast UniversityNanjing 210096China

Contact electrification occurs in many granular material systems due to particle-particle and particle-wall *** this paper,we used a simple device to characterize the electrification of different spheres in a rotating spherical *** charge of the spheres was quantified by a Faraday cup after rotating for various time and the disperse behaviors of charged spheres were recorded by a *** effects of the rotational time,sphere size,rotational speed,sphere material,and relative humidity on the equilibrium charge and triboelectric coefficient were *** results show that the equilibrium surface charge density is independent of the sphere size and the rotating speed,whereas the larger rotating speed enhances the triboelectric *** is also shown that charge relaxation constants are two orders of magnitude lower than the charge generation constants for all spheres at a low relative *** increase of water molecules in the air was found to result in the decline of charge generation constant and the rise of charge relaxation constant,which together cause the decrease of the equilibrium surface charge density.

关键词： Particle charging Equilibriurm charge Charge relaxation Charge generation Electrostatics