Design of a SEM Compatible Slip-Stick Nano-Positioner with High Bearing Capacity

2012 ◽  
Vol 433-440 ◽  
pp. 3052-3059
Author(s):  
Wei Bin Rong ◽  
Miao Yu ◽  
Shi Zhong Zhang ◽  
Le Feng Wang ◽  
Li Ning Sun
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Bearing Capacity ◽  
Dynamic Model ◽  
Experimental Results ◽  
Excellent Performance ◽  
Matlab Simulink ◽  
Scanning Electron

This paper presents a new structure of slip-stick positioner with a high bearing capacity, which is designed according to the requirement of nano-manipulation in the Scanning Electron Microscope (SEM). In addition, to analyze the performance of the slip-stick positioner, a dynamic model is developed in MATLAB/Simulink. The experimental results demonstrate the excellent performance of this positioner and especially its bearing capacity can be up to 400g.

Development of a Nanomanipualtion System for Handling Nanowires

2013 ◽  
Vol 562-565 ◽  
pp. 1092-1097
Author(s):  
Shi Zhong Zhang ◽  
Wei Bin Rong ◽  
Li Ning Sun
Keyword(s):  
Electron Microscope ◽  
Control System ◽  
Scanning Electron Microscope ◽  
High Power ◽  
Power Supply ◽  
Current Control ◽  
Excellent Performance ◽  
Mixed Approach ◽  
Output Driver ◽  
Scanning Electron

A compact and versatile nanomanipulation platform and its dirve-control system are being developed. This nanomanipulation sytem is aimed to handle nanowires (NWs) and fabricate nanostructures by NWs in a Scanning Electron Microscope (SEM). The excellent performance of the compact manipulator developed with corase and fine positioning in one unit has been demonstrated, which shows that the resolution is 8 nm and the steps are from 50 nm to 0.8 μm. For the power supply of the manipulator, a three-output driver is designed with a high-power integrated operational amplifier based on a mixed approach of voltage control and current control. The planar push-and-lift handling of NWs is carried out by the use of two tips to demonstrate the capability of the nanomanipulation sytem inside SEM.

scholarly journals Experiment on Strength and Failure Behavior of Sandstone Containing Pre-Existing Cracks Under Brazilian Compression

2021 ◽  
Vol 9 ◽  
Author(s):  
Xiaojian Cao ◽  
Han Zhang ◽  
Jun Yu ◽  
Tianchong Yu ◽  
Yuxing Qing
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Failure Process ◽  
Experimental Results ◽  
Failure Behavior ◽  
Axial Deformation ◽  
Scanning Electron

Determination of the mechanical properties of rock containing pre-existing cracks under tension condition is of great significance to understand the failure process of rock in engineering. This paper presents the experimental results of sandstone containing pre-existing cracks under Brazilian compression. The characteristics of the microcracks were analyzed by a scanning electron microscope. The results show that the rock containing pre-existing cracks has an obvious anisotropic characteristic. When the crack inclination is 45°, the rock has the minimum tensile strength and the weakest axial deformation resistance.

Correlation between Solidified Microstructure Evolution and Undercooling of Au-12 Wt.%Ge Eutectic Alloy

2020 ◽  
Vol 993 ◽  
pp. 53-59
Author(s):  
Zhen Yong Zhu ◽  
Kai Xiong ◽  
Jun Jie He ◽  
Shun Meng Zhang ◽  
Si Yong Xu ◽  
...  
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Microstructure Evolution ◽  
Eutectic Alloy ◽  
Volume Fraction ◽  
Experimental Results ◽  
Solidification Structure ◽  
Forming Process ◽  
Maximum Undercooling ◽  
Scanning Electron

Highly undercooled solidification experiments were carried out by melt purification combined with cyclic superheating method on Au-12 wt.%Ge eutectic alloy. The solidification structures of Au-12 wt.%Ge eutectic alloy under different undercoolings were also analyzed by using the scanning electron microscope (SEM). The experimental results revealed that the maximum undercooling could reach up to 102 K. The microstructure analysis showed that the coarse bulk eutectic existed in the solidification structure when the undercooling was less than 34 K. When the undercooling was larger than 34 K and less than 56 K, the solidification structure transformed into cellular eutectic. The coarse primary (α-Au) phase precipitated from the undercooled alloy melt when the undercooling was larger than 56 K. The volume fraction of the primary (α-Au) phase gradually increased with the increase of undercooling. In this paper, a method to regulate the solidification structure of Au-12 wt.%Ge eutectic alloy is proposed, which provides a new way to improve the solidification structure and has important guiding significance for the processing and forming process of Au-12 wt.%Ge eutectic alloy.

Electrochemical dechlorination of 2,4-dichlorophenol in aqueous solution on palladium-loaded meshed titanium electrode

2011 ◽  
Vol 63 (2) ◽  
pp. 199-205 ◽  
Author(s):  
Z. R. Sun ◽  
M. Gao ◽  
Y. Z. Peng ◽  
X. Hu
Keyword(s):  
Aqueous Solution ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Ambient Temperature ◽  
Current Efficiency ◽  
Removal Efficiency ◽  
Experimental Results ◽  
Titanium Electrode ◽  
Scanning Electron ◽  
Supporting Electrode

Electrochemical dechlorination of 2,4-dichlorophenol (2,4-DCP) in aqueous solution was investigated on palladium-loaded meshed titanium (Pd/Ti) electrode at ambient temperature. Pd/Ti electrode was prepared with an electrodepositing method. Scanning Electron Microscope (SEM) micrographs show that Pd microparticles uniformly disperse on the meshed Ti supporting electrode with spheroidal structure. Dechlorination experimental results indicate that, in aqueous solution, with the current efficiency of 24.3%, the removal efficiency of 100 mg/L 2,4-DCP on Pd/Ti electrode was 93.2% under the conditions of the dechlorination current of 5 mA and dechlorination time of 90 min. The effect of initial 2,4-DCP concentration was also investigated.

Developmental anatomy of a dimitic basidiomycete, Pterula sp.

1978 ◽  
Vol 56 (3) ◽  
pp. 288-296 ◽  
Author(s):  
Esther G. McLaughlin ◽  
David J. McLaughlin ◽  
David E. Adson
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Light Microscope ◽  
Experimental Results ◽  
Developmental Anatomy ◽  
Scanning Electron

Developmental anatomy of fruitbodies and mycelium in a clavarioid fungus, Pterula sp. (Aphyllophorales), was studied in the light microscope using plastic-embedded material and in the scanning electron microscope. Differentiation of skeletal and generative hyphae and of the hymenium and sclerotioid patches were similar in the fruitbody and mycelium. Experimental results indicated that the hymenium is ageotropic and that fertile fruitbodies form in both upright and inverted cultures. The nature of the skeletal hyphae, and generic delimitations in the Pterulaceae are discussed.

Resistivity-Temperature Properties of La(TixMn1-x)O3 Ceramics

2007 ◽  
Vol 336-338 ◽  
pp. 763-764
Author(s):  
Wei Bing Ma ◽  
Yan Xia Hao ◽  
Yuan Fang Qu ◽  
Ting Xian Xu
Keyword(s):  
Crystal Structure ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Experimental Results ◽  
X Ray Diffraction ◽  
X Ray ◽  
Different Temperatures ◽  
Scanning Electron

Samples of La(TixMn1-x)O3 (0.1 ≤ x ≤ 0.7) were sintered at different temperatures. The experimental results showed that the resistivity-temperature curves of the samples match NTC characteristic. The crystal structure was analyzed using X-ray diffraction and the microstructure was observed by scanning electron microscope.

Study on the Preparation of PSA NanoFibers Using Electro-Spinning Technology and its Characterizations

2012 ◽  
Vol 531-532 ◽  
pp. 527-530
Author(s):  
Wen Jie Chen ◽  
Bin Jie Xin ◽  
Xiang Ji Wu
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Surface Morphology ◽  
Applied Voltage ◽  
Solution Concentration ◽  
The Self ◽  
Experimental Results ◽  
Uniform Structure ◽  
Homogeneous Network ◽  
Scanning Electron

Polysulfonamide (PSA) superfine fibers were prepared by the self-developed device using the electrospinning technology. The micro surface morphology of the manufactured PSA fibers was characterized by the Scanning Electron Microscope (SEM). It was found that the diameter of PSA fibers and its variance can be influenced by the electrospinning parameters. The experimental results indicate that the morphology of PSA fibers ranged from irregular (beaded) to uniform structure with an increase of solution concentration; the thickness and its variance of the PSA fibers were decreased with the increasing of applied voltage; the morphology and thickness of the PSA fibers were also affected by the tip-to-collector distance. Our investigation shows that the diameter of the PSA fibers can reach around 100nm when spun at the conditions of 28kv applied voltage, 10wt% solution concentration and 15 cm tip-target distance, with a related homogeneous network distribution.

Research on the Dark Fiber Causes and Variety of the Acidic Fiber Imaging Bundle

2015 ◽  
Vol 1096 ◽  
pp. 275-279
Author(s):  
De Chun Zhou ◽  
Zhong Liang Qiao ◽  
Xue Mei Bai
Keyword(s):  
Electron Microscope ◽  
High Resolution ◽  
Probability Distribution ◽  
Scanning Electron Microscope ◽  
Delta Function ◽  
Dirac Delta Function ◽  
Experimental Results ◽  
Genetic Mechanism ◽  
Dirac Delta ◽  
Scanning Electron

The paper carried out a research on the dark fiber shape and genetic mechanism of the acidic fiber imaging bundle. The Dirac delta function is firstly used to analyze the probability distribution variety of the dark silk. The experimental results for the detection of the scanning electron microscope (SEM) and resolution show that the genetic ratio of the dark fiber is proportionate to length of the bundle and inversely proportional to the monofilament diameter. However, the monofilament diameter should be decreased to increase the resolution. The technique and the structure should be improved to meet the requirements of both high resolution and low dark silk rate. Therefore, solutions and effective measurements for reducing even if avoiding the dark silk are proposed in the paper. The research will guide the preparation and application of the high-resolution fiber imaging bundle.

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