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Evaluation of Young's Modulus and Residual Stress of NiFe Film by Microbridge Testing

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Journal of Materials Science & Technology 2006年第3期22卷 345-348页

作者： Zhimin ZHOU Yong ZHOU Mingjun WANG Chunsheng YANG Ji＇an CHEN Wen DING Xiaoyu GAO Taihua ZHANG Key Laboratory for Thin Film and Microfabrication Technology of Ministry of Education Research Institute of Micro/Nanometer Science and TechnologyShanghai Jiao Tong University Shanghai 200030 China State Key Laboratory of Nonlinear Mechanics （LNM） Institute of Mechanics Chinese Academy of Sciences Beijing 100080 China

Microbridge testing was used to measure the Young＇s modulus and residual stress of metallic films. Samples of freestanding NiFe film microbridge were fabricated by microelectromechanical systems. Special ceramic shaft structure was designed to solve the problem of getting the load-deflection curve of NiFe film microbridge by the Nanoindenter XP system with normal Berkovich probe. Theoretical analysis of load-deflection curves of the microbridges was proposed to evaluate the Young＇s modulus and residual stress of the films simultaneously. The calculated results based on experimental measurements show that the average Young＇s modulus and residual stress for the electroplated NiFe films are 203.2 GPa and 333.0 MPa, respectively, while the Young＇s modulus measured by the Nano-hardness method is 209.6：1：11.8 GPa for the thick NiFe film with silicon substrate.

关键词： Mechanical properties Metal thin film Nanoindentation

Synthesis of carbon nanotube arrays using ethanol in porous anodic aluminum oxide template

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Chinese Science Bulletin 2005年第11期50卷 1097-1100页

作者： YUGuojun WANGSen GONGJinlong ZHUDezhang HESuixia LIYulan ZHUZhiyuan shanghaiInstituteofAppliedPhysics GraduateSchooloftheChineseAcademyofSciencesShanghai201800China

Carbon nanotube (CNT) arrays confined by porous anodic aluminum oxide (AAO) template were synthe- sized using ethanol as reactant carbon source at low pressure. Images by scanning electron microscope (SEM) and low magnification transmission electron microscopy (TEM) show that these CNTs have highly uniform outer diameter and length, absolutely controlled by the diameter and depth of nano-channel arrays of the AAO. High resolution transmis- sion electron microscopy (HRTEM) imaging indicates that the graphitization of the CNT walls is better than the results reported on this kind of template-based CNT arrays, al- though it is not so good as that of multiwalled carbon nano- tubes (MWCNTs) synthesized by catalysis. CNTs synthesized using acetylene as reactant gas show much less graphitiza- tion than those prepared using ethanol by comparing the results of HRTEM and Raman spectroscopy. The etching effects of decomposed OH radicals on the amorphous carbon and the roughness of AAO nano-channel arrays on the CNTs growth were employed to explain the graphitization and growth of the CNTs.

关键词：乙醇多孔渗水氧化铝模板水蒸气沉积作用

Spatiotemporal expression of inducible nitric oxide synthase and cyclooxygenase 2 in the spinal cord during early stage sciatic nerve crush injury

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Neural Regeneration Research 2010年第10期5卷 747-751页

作者： Qiben Wang Linfeng Zheng Yinggui Xie Qinghong Huang He Huang Zhicheng Zeng Song Wu Department of Human Anatomy XiangNan University Chenzhou 423000 Hunan Province China Department of Radiology Shanghai First People's Hospital Medical College Shanghai Jiaotong University Shanghai 200080 China Department of Orthopaedics Third Xiangya Hospital Central South University Changsha 410013 Hunan Province China Department of Human Anatomy and Neurobiology Xiangya School of Medicine Central South University Changsha 410013 Hunan Province China

BACKGROUND： Previous studies have shown that inducible nitric oxide synthase （iNOS） and cyclooxygenase 2 （COX-2） participate in inflammatory immune responses and neuropathic pain following peripheral nerve injury. However, few reports have addressed time-dependent expression of iNOS and COX-2 following peripheral nerve injury. OBJECTIVE： To investigate spatiotemporal expression of iNOS and COX-2 during early stage sciatic nerve crush ***, TIME AND SETTING： The randomized, controlled, animal experiment was performed at the Laboratory of Applied Anatomy, Department of Human Anatomy and Neurobiology, Central South University, China from September 2006 to September ***： Mouse anti-rat iNOS monoclonal antibody and goat anti-rat COX-2 monoclonal antibody （Transduction Laboratory, USA）, as well as biotinylated rabbit anti-mouse lgG and biotinylated rabbit anti-goat IgG （Santa Cruz Biotechnology, USA） were used in the present ***： A total of 48 healthy, adult, Sprague Dawley rats were randomly assigned to three groups. In the model group （n = 32）, crush injury to the right sciatic nerve was established using an artery clamp. The model group was further assigned to four subgroups according to survival time （6,12, 24, and 72 hours）, respectively （n = 8）. Sham surgery （n = 8） and normal control （n = 8） groups were also *** OUTCOME MEASURES： iNOS and COX-2 expression was detected in the L4-6 spinal cord with immunohistochemistry. Gray values of iNOS- and COX-2-postive cells in the anterior horn and posterior horn of spinal cord, as well as quantification of iNOS- and COX-2-positive cells in the anterior horn of spinal cord, were ***： iNOS and COX-2 expression gradually increased in the anterior horn and posterior horn of the spinal cord on the damaged side over time from 6 hours following sciatic nerve injury （P〈0.05） and peaked at 72 hours. Simultaneously, the number of iNOS- and COX-2-positive cells similarly increased

关键词： inducible nitric oxide synthase cyclooxygenase 2 sciatic nerve spinal cord peripheral nerve injury neural regeneration

A study on measuring distribution of nanoparticle size based on ultrasonic attenuation spectrum

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Chinese Journal of Acoustics 2011年第3期30卷 261-271页

作者： HOU Huaishu SU Mingxu CAI Xiaoshu Institute of Particle and Two Phase Flow Measurement University of Shanghai for Science and Technology Shanghai 20093 College of Mechanical Engineering Shanghai Institute of Technology Shanghai 201418

Through varying the ultrasonic path length, the ultrasonic attenuation spectrum of the nanometer particle suspensions is measured. Based on the McClements and BLBL model, the Optimum Regularization Technique is employed to inverse the distribution of particle size for nanometer particles. Experiments are carried out to measure the distribution of particle size of aqueous nanometer titanium dioxide suspension with volume fraction of 1%. The ultrasonic measurement results show good consistence with those from TEM （Transmission Electron Mi- croscope） and centrifugal sedimentation particle size analyzers, which indicate that measuring distribution of the particle size of nanometer particles with the ultrasonic attenuation spectrum is feasible and reliable.

关键词：纳米粒子悬浮液超声波测量超声衰减粒子尺寸分布纳米二氧化钛纳米颗粒粒度分析仪路径长度

Latest advances in soft X-ray spectromicroscopy at SSRF

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Nuclear Science and Techniques 2015年第4期26卷 1-11页

作者：张立娟许子健张祥志于怀娜邹鹰郭智甄香君曹杰峰孟祥雨李俊琴陈振华王勇邰仁忠 shanghai Synchrotron Radiation Facility Shanghai Institute of Applied PhysicsChinese Academy of Sciences

The BL08U1 A beamline is established as a sophisticated platform at shanghai Synchrotron Radiation Facility(SSRF), taking advantage of its high spatial resolution(10 000),for studying properties of solid, liquid, gas, film and other forms of materials at sub-micron scale. In this paper,we present a review on newly implemented techniques, such as total electron yield(TEY), dual energy contrast imaging, nano-CT, soft X-ray excited optical luminance(SXEOL), and coherent diffraction imaging(CDI)under development. Several research cases in nanomaterials, environmental science and biology are presented to demonstrate capabilities of the beamline.

关键词：软X射线上海同步辐射装置测试谱学高能量分辨率高空间分辨率纳米材料衍射成像