Now showing items 27-46 of 62

    • Parametric Simulation and Optimization of Cold-test Properties for a 220 GHz Broadband Folded Waveguide Traveling-wave Tube 

      Zheng, Ruilin; Chen, Xuyuan; 陈旭远 (J INFRARED MILLIM TE, 2009-09)
      Characterized with full-metal structure, high output power and broad bandwidth, microfabricated folded waveguide is considered as a robust slow-wave structure for millimeter wave traveling-wave tubes. In this paper, cold-test ...
    • Particle-in-Cell Simulation and Optimization for a 220-GHz Folded-Waveguide Traveling-Wave Tube 

      Zheng, Ruilin; Ohlckers, Per; Chen, Xuyuan; 陈旭远 (IEEE T ELECTRON DEV, 2011-07)
      The folded-waveguide slow-wave structure (SWS) is a robust beam-wave interaction circuit for millimeter-wave traveling-wave tubes. We applied a particle-in-cell solver (Computer Simulation Technology Particle Studio) to ...
    • Pd nanosheet-covered hollow mesoporous silica nanoparticles as a platform for the chemo-photothermal treatment of cancer cells 

      Fang, Weijun; Tang, Shaoheng; Liu, Pengxin; Fang, Xiaoliang; Gong, Jiawei; Zheng, Nanfeng; 方晓亮; 郑南峰 (Wiley-VCH Verlag, 2012)
      A versatile system combining chemotherapy with photothermal therapy for cancer cells using Pd nanosheet-covered hollow mesoporous silica nanoparticles is reported. While the hollow mesoporous silica core can be used to ...
    • Precisely controlled resorcinol-formaldehyde resin coating for fabricating core-shell, hollow, and yolk-shell carbon nanostructures 

      Fang, Xiaoliang; Liu, Shengjie; Zang, Jun; Xu, Chaofa; Zheng, Ming-Sen; Dong, Quan-Feng; Sun, Daohua; Zheng, Nanfeng; 方晓亮; 郑明森; 董全峰; 孙道华; 郑南峰 (ROYAL SOC CHEMISTRY, 2013)
      This work provides a facile one-step sol-gel route to synthesize high-quality resorcinol-formaldehyde (RF) resin coated nanocomposites that can be further used to fabricate desired carbon nanostructures. Colloidal particles ...
    • Preparation and characterization of polypyrrole films for three-dimensional micro supercapacitor 

      Sun, Wei; Chen, Xuyuan; 陈旭远 (J POWER SOURCES, 2009-09-05)
      As electro-active electrodes for supercapacitors, micro polypyrrole (PPy) films doping with ClO(4)(-) (PPY(ClO4)) and Cl(-) (PPy(Cl)) are prepared on Ni layers modified three-dimensional (3D) structures in Si substrates. ...
    • Self-supporting sulfur cathodes enabled by two-dimensional carbon yolk-shell nanosheets for high-energy-density lithium-sulfur batteries 

      Fei Pei; 裴非; Lele Lin; Daohui Ou; Zongmin Zheng; 郑宗敏; Shiguang Mo; Xiaoliang Fang; 方晓亮; Nanfeng Zheng; 郑南峰 (Macmillan Publishers Limited, part of Springer Nature, 2017-09)
      【Abstract】How to exert the energy density advantage is a key link in the development of lithium–sulfur batteries. Therefore, the performance degradation of high-sulfur-loading cathodes becomes an urgent problem to be solved ...
    • Self-templating synthesis of hollow mesoporous silica and their applications in catalysis and drug delivery 

      Fang, Xiaoliang; Zhao, Xiaojing; Fang, Weijun; Chen, Cheng; Zheng, Nanfeng; 方晓亮; 郑南峰 (ROYAL SOC CHEMISTRY, 2013)
      Hollow mesoporous silica materials have been intensively pursued because of their unique properties for various applications. Yolk/shell structured hollow mesoporous silica with functional cores inside their hollow interior ...
    • SERS技术应用于食品中罗丹明B的快速检测 

      许丽梅; 康靖; 曾勇明; 康怀志 (2017)
      目的:罗丹明B(Rhodamine; B,RB)是一种人工合成的三苯甲烷类碱性染料,因其具有潜在的毒性、致癌性被禁止在食品中添加。目前,在中国还没有关于罗丹明B检测的国家标准,也没有; 快速检测标准,建立合适的现场快速检测方法迫在眉睫。方法:借助表面增强拉曼光谱(SERS)技术,以金纳米溶胶为拉曼信号增强模块,利用自制样品前处理; 仪与便携式拉曼光谱检测仪,实现对辣椒制品、腊肉、果汁、葡萄酒等食品中RB的快速检测。结果:快速前处理技术与 ...
    • Symmetric redox supercapacitor based on micro-fabrication with three-dimensional polypyrrole electrodes 

      Sun, Wei; Zheng, Ruilin; Chen, Xuyuan; 陈旭远 (J POWER SOURCES, 2010-10-15)
      To achieve higher energy density and power density, we have designed and fabricated a symmetric redox supercapacitor based on microelectromechanical system (MEMS) technologies. The supercapacitor consists of a three-dimensional ...
    • The application of freestanding titanate nanofiber paper for scattering layers in dye-sensitized solar cells 

      Zhao, Xiaochong; Lin, Hong; Li, Xin; Li, Jianbao; 李鑫 (MATER LETT, 2011-04-30)
      A titanate nanofiber paper with robust and good flexible property was successfully prepared by alkali hydrothermal synthesis with simple paper-making method. These nanofibers were about 80 nm in diameter and had a typical ...
    • The effect of compression on electron transport and recombination in plastic TiO2 photoanodes 

      Zhao, Xiaochong; Lin, Hong; Li, Xin; Li, Jianbao; 李鑫 (ELECTROCHIM ACTA, 2011-07-15)
      The compression method was applied for the preparation of plastic TiO2 porous films on a conductive indium-tin oxide (ITO)-coated polyethylene naphthalate (PEN) substrate at low temperature for the generation of high-efficiency ...
    • The effect of dispersion of TiO2 nanoparticles on preparation of flexible dye-sensitized photoanodes 

      Zhao, Xiao Chong; Lin, Hong; Liu, Yizhu; Li, Xin; Yang, Pan; Chen, Huiyuan Y.; Wang, Gang; Li, Jian Bao; 李鑫 (Science in China Press, 2012 July)
      Generally, nanoparticles are easy to aggregate due to their nano sizes, which influence the physical and chemical properties. In this work, a dispersion treatment of the TiO2 nanoparticles with different average sizes was ...
    • The influence of nitric acid on electron transport and recombination for non-sintering Tio(2) photoanodes 

      Zhao, Xiaochong; Lin, Hong; Li, Xin; Li, Jianbao; 李鑫 (ELECTROCHIM ACTA, 2012-04-15)
      Nitric acid was added to binder-free TiO2 paste for the preparation of plastic TiO2 dye-sensitized photoanode at low temperature on conductive indium-tin oxide (ITO)-coated polyethylene naphthalate (PEN) substrate. The ...
    • 一种获得纳米间隙电极的接触光刻方法 

      张玉龙; 张艳; 蒋书森 (2013-08-15)
      提出一种称之为“阵列误差光刻“的方法。采用两次接触光刻和两次金属剥离工艺,形成两组顶端相对的电极阵列,利用第二次接触光刻时的对准误差,在这两组电极之间按照概率分布形成了一个最小的纳米间隙。设计并制作了一种含有16对电极的验证器件,按照光刻对准误差的范围为±2.0μM进行估算,理论上最小间隙的分布范围为0~150 nM。通过扫描电镜测量实际制造的样品,获得了大量50 nM以下的电极对,最小间隙为16.6 nM,并且制备的电极层厚度可以达到200 ...
    • “中国-澳大利亚功能纳米材料联合实验室”揭牌 

      Unknown author (2009)
      <正>2009年7月25日,“中国-澳大利亚功能纳米材料联合实验室“揭牌仪式在厦门大学隆重举行.福建省科技厅、厦门市科技局、厦门大学有关领导和联合实验室主任朱贤方
    • 中子辐照的单晶硅参数研究 

      沈华; 朱文章; 吴孙桃; 谢敬仁; 陈仪明 (1994)
      在不同温度和红外光照下,测量了经中子辐照的单晶硅表面光电压,确定了其深能级的位置和少子扩散长度;由双能级复合理论,推导了中子辐照单晶硅的深能级复合中心和寿命的计算公式;计算了热中子辐照和高能中子辐照单晶硅后的深能级密度、费米能级和其他有关重要参数。
    • 化学气相沉积法制备单层石墨烯的优化 

      毕瑞可; 张杰; 吴玉玲; 曾毅波; 张为中; 郭航 (2017)
      作为碳原子家族的最新成员,二维结构的石墨烯具备优异的物理化学性质和广阔的应用前景,成为新材料研究领域的热点研究对象。对化学气相沉积(CVD)法进行了优化,成功制备得到了高质量的单层石墨烯。优化后的实验工艺为:首先对铜箔进行化学抛光和退火预处理;然后将预处理后的铜箔加工成荷包状;氢气(H2)氛围下,以甲烷(CH4)为碳源,对石墨烯进行化学气相沉积;当甲烷和氢气体积流量分别为10 cm3/min和20 cm3/min时,在1 030℃条件下生长20 ...
    • 基于MEMS技术的F-P腔滤波器分析与设计 

      李元元; 蒙庆华; 陈四海; 曾毅波; 郭航 (2017)
      通过对微光纤法布里-珀罗(F-P)腔滤波器工作原理的综合分析,确立了微F-P腔滤波器静电驱动腔长调谐方案。对可调谐滤波器的主体部分进行光学设计和; 分析,确立了反射镜的多层薄膜光学结构,并借助ANSYS有限元力电耦合分析,最终选择L型桥臂支撑的腔体结构,可以实现0.625; mum的调谐范围;保持桥面平行的能力很高,可实现高精度的滤波效果;结构稳固,能够抵抗制造时的残余应力。
    • 基于一维TiO2纳米管阵列薄膜的β伏特效应研究 

      王娜; 马洋; 陈长松; 陈江; 伞海生; 陈继革; 成正东 (2018-01-30)
      介绍了一种采用宽禁带半导体二氧化钛纳米管阵列薄膜材料制备β伏特效应同位素电池的方法.通过对金属钛片的电化学阳极氧化制备了垂直定向、有序排列的二氧化钛纳米管阵列薄膜,研究了退火条件对二氧化钛纳米管阵列薄膜半导体光电性能的影响.通过与镍-63辐射源的集成封装,形成三明治结构镍-63/二氧化钛纳米管阵列薄膜/钛片的β伏特同位素电池.实验结果表明,基于氩气氛围下450?C退火的黑色二氧化钛纳米管阵列薄膜具有高的氧空位缺陷浓度和宽的可见-紫外吸收 ...
    • 基于单元状态监控的机联网智能制造系统架构设计探析 

      彭云峰; 汤期林; 童雅芳; 王振忠; 毕果 (2018-06-15)
      随着\"工业4.0\"和\"中国智能制造2025\"指导框架的提出,制造领域面临急迫的产业转型与升级改造,机械制造产业也必将向智能制造时代迈进。精密制造领域作为机械制造产业中的重要分支,其对质量控制的要求越来越高,尤其在同类型产品的批量化精密制造中,高精度、高质量与高良率是制造过程必须考虑的首要因素。基于同类产品批量化精密制造的特点,本文在以大数据及物联网为架构的智能制造基础上,提出一种基于制造单元加工状态监控与决策的机联网智能制造子系 ...