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2013 International Conference on Manipulation, Manufacturing and Measurement on the Nanoscale最新文献

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A piezoelectric inchworm actuator based on the principle of flexible amplification 一种基于柔性放大原理的压电尺蠖驱动器
Li Ma, Chenyang Jiang, Jintao Xiao, Kun Wang, Wei Xie, Bo Liu
Piezoelectric inchworm actuators have a wide application in the field of Nano positioning and ultra-precision detecting instruments which depend on the characteristics of large stroke, high resolution and rigidity, quick response speed, small size, high driving force, low power consumption, not being affected by electromagnetic interference, and so on. A new piezoelectric inchworm actuator based on the principle of flexible amplification is developed in this paper. In the moving mechanism of the actuator, its clamping mechanism adopts symmetrical lever amplification structure, and its middle drive mechanism uses compound bridge structure. Theoretical analysis and finite element analysis are carried out to design the hinge structure which has influences on the properties of the moving mechanism. High precision cross roller guide ways are utilized to improve the positioning accuracy of the actuator. The laboratory platform of the piezoelectric inchworm actuator is built. A controlling program of the actuator is compiled by Lab-VIEW. Then, the properties of the actuator are tested. The experimental results show that the working stroke of the actuator is 50 mm, the minimum step pitch is 60 μm the maximum step pitch is 105 μm the fast speed is 2.04 mm/s, the maximum clamping force is 21 N, the maximum dead load is 500 g, and the average speed of the actuator can reach 1.47 mm/s when the driving frequency is 50 Hz and the load is 1 kg.
压电尺蠖驱动器具有行程大、分辨率高、刚性好、响应速度快、体积小、驱动力大、功耗低、不受电磁干扰等特点,在纳米定位和超精密检测仪器领域有着广泛的应用。本文研制了一种基于柔性放大原理的压电尺蠖作动器。在作动器的运动机构中,其夹紧机构采用对称杠杆放大结构,中间驱动机构采用复合桥式结构。对影响运动机构性能的铰链结构进行了理论分析和有限元分析。采用高精度交叉滚子导轨,提高了执行机构的定位精度。搭建了压电尺蠖驱动器实验平台。利用Lab-VIEW编写了执行器的控制程序。然后,对该驱动器的性能进行了测试。实验结果表明,当驱动频率为50 Hz,负载为1 kg时,执行机构的工作行程为50 mm,最小步距为60 μm,最大步距为105 μm,最快速度为2.04 mm/s,最大夹紧力为21 N,最大恒载为500 g,执行机构的平均速度可达1.47 mm/s。
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引用次数: 6
Multi-coupling hydrophobic characteristics on the lower surface of the lotus leaf 荷叶下表面多偶联疏水特性研究
Jing Li, Feng Du, Jinkai Xu, Xue Wang, Huadong Yu
The multi-coupling characteristics and the contact angle performance of the lower surface of the lotus leaf were investigated through laser scanning confocal microscope, scanning electron microscopy and contact angle measurement. The results indicate that the lower surfaces of the lotus leaf possess biological multi-coupling contents and excellent hydrophobic performance. Scallops morphology, micro grid-like structure and the wax-like materials with the lower surface energy of the lower surfaces of the lotus leaf were systematically investigated as biological coupling contents contributing to improve the hydrophobic performance. In this paper, researchers found that hydrophobic function of the lotus leaf' lower surface are results of interaction among coupling contents by certain coupling mechanisms from the bionic viewpoint.
采用激光扫描共聚焦显微镜、扫描电镜和接触角测量等方法研究了荷叶下表面的多重耦合特性和接触角性能。结果表明,荷叶下表面具有良好的疏水性和生物多偶联性。系统研究了扇贝形态、微网格状结构和荷叶下表面能较低的蜡状材料作为提高疏水性能的生物偶联成分。本文从仿生的角度发现,荷叶下表面的疏水功能是耦合物之间通过一定的耦合机制相互作用的结果。
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引用次数: 0
Effect of pulse repetition rate on silicon wafer modification by four-beam laser interference 脉冲重复率对四束激光干涉硅片改性的影响
L. Zhao, Z. Wang, W. Li, M. Yu, Z. Zhang, J. Xu, Y. Yu, Z. Weng, S. Li, C. Maple, D. Li, Y. Yue
This paper discusses the effect of pulse repetition rates on silicon wafer modification by four-beam laser interference. In the work, four-beam laser interference was used to pattern single crystal silicon wafers for the fabrication of dots, and different laser pulse repetition rates were applied to the process in the air. The results were obtained from 10 laser exposure pulses with the single laser fluence of 283mJ/cm2, the pulse repetition rates were 1Hz, 5Hz and 10Hz, the laser wavelength was 1064nm and the pulse duration 7-9ns. The results have been observed using a scanning electron microscope (SEM) and optical microscope. They indicate that the laser pulse repetition rate has to be properly selected for the fabrication of the structures of dots using four-beam laser interference.
本文讨论了脉冲重复率对四束激光干涉硅片改性的影响。本文采用四束激光干涉对单晶硅片进行点阵加工,并在空气中施加不同的激光脉冲重复率。实验采用10个激光曝光脉冲,单激光辐照量为283mJ/cm2,脉冲重复频率为1Hz、5Hz和10Hz,激光波长为1064nm,脉冲持续时间为7 ~ 9ns。用扫描电子显微镜和光学显微镜观察了实验结果。结果表明,在采用四束激光干涉制备点阵结构时,激光脉冲重复率必须合理选择。
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引用次数: 0
Research on a micro-to-nano bio-manipulation device 一种微纳米生物操纵装置的研究
Huixiang Wang, Lining Sun
Molecular techniques are transforming our understanding of cellular function and disease. However, accurate molecular analysis methods will be limited if the input DNA, RNA, or protein is not derived from pure population of cells or is contaminated by the wrong cells. This paper will introduce a design of a micro-to-nano manipulation device. It was an automatic, rapid, accurate separation and extraction system designated group of cells or single cells for pathology research. Essential micro-to-nano manipulations were executed by microdissection knife based on piezo-power ultrasonic vibration (vibration frequency at 15-50 kHz and amplitude 0.001-1μm) and microcollection tool based on vacuum adsorption (controllable press at 0.001-0.5Mpa). Lots of 5μm liver embedded sections were dissected and collected successfully by many experiments. Contrast testing experiment indicates that no harm to tissue by the ultrasonic dissection tool, good availability to collection by the vacuum adsorption and the micromanipulation system is applicable to bio-micro-to-nano manipulations with high stability and accuracy.
分子技术正在改变我们对细胞功能和疾病的理解。然而,如果输入的DNA、RNA或蛋白质不是来自纯细胞群或被错误的细胞污染,则精确的分子分析方法将受到限制。本文将介绍一种微纳操纵装置的设计。它是一种用于病理研究的指定细胞群或单个细胞的自动、快速、准确的分离和提取系统。采用基于压电功率超声振动的微解剖刀(振动频率为15 ~ 50 kHz,振幅为0.001 ~ 1μm)和基于真空吸附的微采集工具(可控压力为0.001 ~ 0.5 mpa)进行必要的微纳操作。通过多次实验,成功地解剖和收集了大量5μm肝包埋切片。对比测试实验表明,超声解剖工具对组织无损伤,真空吸附收集性好,微操作系统适用于生物微纳米操作,稳定性和准确性高。
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引用次数: 2
Effect of fullerenol on the morphology features of SW480 cells 富勒烯醇对SW480细胞形态学特征的影响
Jinyun Liu, Zuobin Wang, Yingmin Qu, Guoliang Wang, Dayou Li, C. Maple
Paper discusses the effect of fullerenol on the morphology features of colon cancer SW480 cells. In the work, the changes of morphology features of SW480 cells, treated with three groups of fullerenol concentrations, were studied using atomic force microscopy (AFM) to evaluate their induction of apoptosis in colon cancer cells on the nanoscale. There were 20 single cells of each group used to test and determine the changes of their features in the experiments, including untreated SW480 cells, SW480 cells treated with Img/ml fullerenol and SW480 cells treated with 2mg/ml fullerenol. The experimental results have shown that the untreated and treated SW480 cells have different sizes and shapes. The lengths of the cells were decreased and their heights increased with the increase of the fullerenol dose.
本文探讨富勒烯醇对结肠癌SW480细胞形态特征的影响。本研究利用原子力显微镜(AFM)研究了三组富勒烯醇浓度处理SW480细胞的形态学变化,以评估其在纳米尺度上对结肠癌细胞凋亡的诱导作用。每组20个单细胞用于检测实验中其特征的变化,包括未处理的SW480细胞,Img/ml富勒烯醇处理的SW480细胞和2mg/ml富勒烯醇处理的SW480细胞。实验结果表明,未处理和处理的SW480细胞具有不同的大小和形状。随着富勒烯醇剂量的增加,细胞长度减小,细胞高度增大。
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引用次数: 2
The next generation microelectronics craft technique: Nanoimprint lithography 下一代微电子工艺技术:纳米压印光刻
Jiang Wei, Wang Nan, Yan Wei, Hu Song, Pu Xiao-qiong
Transfer of graphics is achieved by optical lithography for several decades in semiconductor process. The production capacity of 45 nm node has been formed. But now semiconductor industry is difficult to be developed according to the Moore law because of the inherent limitations of optical lithography. Now electron-beam directwriting, X-ray exposure and nanoimprint technology are the main technologies for next generation graphics transfer technology. Nanoimprint technology has the advantages of high yield, lowcost and simple process. This paper introduced the traditional nanoimprint technology and its development, including the principle, applications and challenges.
几十年来,在半导体工艺中,图形的转移是通过光学光刻实现的。45纳米节点的生产能力已经形成。但由于光学光刻固有的局限性,目前半导体工业很难按照摩尔定律发展。目前,电子束直写技术、x射线曝光技术和纳米压印技术是下一代图形转印技术的主要技术。纳米压印技术具有收率高、成本低、工艺简单等优点。本文介绍了传统的纳米压印技术及其发展,包括其原理、应用和面临的挑战。
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引用次数: 0
Simulation and experimental verification of driving mechanism for a microfluidic device based on electrowetting-on-dielectric 基于介质电润湿的微流控装置驱动机理仿真与实验验证
Liguo Chen, Xiaowei Xu, Wenyuan He, Lining Sun
According to obtain the mechanism of electrowetting-on-dielectric (EWOD), the instantaneous pressure difference inside a droplet was obtained by means of a numerical simulation method in this paper, which was the root reason for EWOD. First, based upon the theory of electrowetting-on-dielectric(EWOD), a geometrical model of EWOD was established in a commercial software using VOF method. Next, deriving that two kinds of fluid which should follow the law of mass conservation and principle of momentum conservation. The experimental results show that the numerical simulation results are in good agreement with the experimental results, In one period of motion, the higher pressure region inside a droplet will keep changing and transferring along with the driving time until a steady state of pressure difference is obtained; besides, the much longer driving time is, the much larger pressure difference will be inside a droplet. The transfer of higher pressure region is the root reason for droplet establishing the velocity field which vividly illustrates how the droplet deforms.
在获得介质上电润湿机理的基础上,通过数值模拟的方法得到了液滴内部的瞬时压差,这是产生介质上电润湿的根本原因。首先,在介质电润湿理论的基础上,利用VOF方法在商业软件中建立了介质电润湿的几何模型。其次,推导出两种流体应遵循质量守恒定律和动量守恒原理。实验结果表明,数值模拟结果与实验结果吻合较好,在一个运动周期内,液滴内部高压区会随着驱动时间不断变化和转移,直至获得稳定的压差状态;此外,驱动时间越长,液滴内部的压差也越大。高压区的传递是液滴形成速度场的根本原因,它生动地说明了液滴的变形过程。
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引用次数: 1
Pattern stretchable micro-nano thin film via Electrohydrodynamic Direct-Writing 通过电流体动力直接写入的图案可拉伸微纳薄膜
Jin Wei, Jianyi Zheng, G. Zheng, Xiang Wang, Guangqi He, Haiyan Liu, Daoheng Sun, Juan Liu
In this paper, mechanical stretching force is introduced into the Electrohydrodynamic Direct-Write (EDW) process. The effects of mechanical stretching on the rheology and deposition behaviors of EDW jet were investigated. The stretching affects that stemmed from the EDW motion platform provided an extra force on the charged jet. The larger stretching force applied on the jet played a good role to overcome bending instability, and stretch the jet into finer ones. Since the short distance between spinneret and collector, the mechanical stretching force acted more important role on the jet formation process. Thanks to the stretching effect, the whipping of charged jet can be avoided and micro/nano thin film without curve structure can be direct-written on the collector. With increasing collector motion velocity, the line width and thickness of micro/nano thin film will be decreased. During the EDW process, the mechanical stretching force had provided an excellent aspect to control the morphology and deposition pattern of EDWed micro/nano thin film.
将机械拉伸力引入到电液直写(EDW)过程中。研究了机械拉伸对EDW射流流变学和沉积行为的影响。EDW运动平台产生的拉伸影响为带电射流提供了额外的力。施加较大的拉伸力对克服弯曲不稳定性起到了很好的作用,使射流拉伸成更细的射流。由于喷丝板与收集器之间的距离较短,机械拉伸力在射流形成过程中起着更重要的作用。利用拉伸效应,可以避免带电射流的振荡,实现无曲线结构的微纳薄膜直接写入集热器上。随着集电极运动速度的增加,微纳薄膜的线宽和厚度会减小。在EDW过程中,机械拉伸力为控制EDW微纳薄膜的形貌和沉积模式提供了一个很好的方面。
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引用次数: 1
Experimental system identification and feed-forward control of a 2-DOF flexure-based mechanism 二自由度柔性机构的实验系统辨识与前馈控制
U. Bhagat, B. Shirinzadeh, L. Clark, Y. Qin, D. Zhang, Y. Tian
The work presented in this paper focuses on the system identification of a 2-DOF flexure-based mechanism, designed for micro/nano scale positioning and manipulation. In the presented compliant mechanism, the cross axis coupling ratio is below 1% indicating excellent decoupling performance. The system identification procedure, experimental design, data collection, data analysis, and validation of the identified system are detailed in this paper. A linear sine swept signal over a range from 1 Hz to 1000 Hz is applied to the system as an input. Laser interferometry-based sensing and measurement technique is used to measure the response of the system. The experimental data is used to evaluate the transfer function of the system in the X and Y axes. The first natural frequency of the 2-DOF mechanism in the X and Y axes are estimated using the identified models, which are found out to be 557 Hz and 545 Hz respectively. Validation data is collected and used to verify the accuracy of the identified model. The error between the predicted output of the identified model and the experimental response is found to be less than ±10%, mostly resulted from actuator hysteresis. Further, a feedforward controller is implemented to track a 1-DOF smooth multiple-frequency trajectory.
本文主要研究了一种用于微纳定位和操纵的二自由度柔性机构的系统辨识问题。在所提出的柔性机构中,跨轴耦合比小于1%,显示出良好的解耦性能。本文详细介绍了系统的识别程序、实验设计、数据收集、数据分析以及识别系统的验证。将1 Hz到1000 Hz范围内的线性正弦扫描信号作为输入应用于系统。采用基于激光干涉的传感测量技术对系统的响应进行测量。利用实验数据计算了系统在X轴和Y轴上的传递函数。利用所识别的模型估计了二自由度机构在X轴和Y轴上的第一固有频率,分别为557 Hz和545 Hz。收集验证数据并用于验证已识别模型的准确性。模型的预测输出与实验响应的误差小于±10%,主要是由于执行器的滞后造成的。在此基础上,设计了一种前馈控制器来跟踪1自由度光滑多频轨迹。
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引用次数: 0
Design and research of miniaturization two-dimensional micro-positioning platform based on parallel sheet plate flexible decoupling beams 基于平行薄板柔性解耦梁的小型化二维微定位平台设计与研究
Chen Li-guo, Lei Yan-yan, Chen Tao, Pan Ming-qiang, Gu Yang-qin
High precision positioning stage has played increasingly important role in the areas of aeronautics and astronautics, ultra-precision manufacturing and measuring, microelectronics, biological engineering, optical engineering, etc. In this paper, a piezo-powered 2D micro-positioning stage based on parallel sheet plate flexible beams is designed. A lever amplifier structure connected by circular arc flexible hinges is designed, which can effectively enlarge driven displacement and narrow the size of the positioning stage. The structure of parallel flexible decoupling beams and circular arc flexure hinges are simulated by ANSYS. The simulation results show that the structure of the stage can effectively reduce the coupling of the micro positioning stage. Finally, the stage is manufactured and the experiments proved that the positioning accuracy is 10nm and the coupling of the micro positioning platform is 5.036%.
高精度定位台在航空航天、超精密制造与测量、微电子、生物工程、光学工程等领域发挥着越来越重要的作用。设计了一种基于平行薄板柔性梁的压电驱动二维微定位平台。设计了一种圆弧柔性铰链连接的杠杆放大结构,有效地扩大了驱动位移,缩小了定位台的尺寸。利用ANSYS软件对并联柔性解耦梁和圆弧柔性铰链的结构进行了仿真分析。仿真结果表明,该平台结构可以有效降低微定位平台的耦合。实验证明,该平台的定位精度为10nm,微定位平台的耦合度为5.036%。
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引用次数: 1
期刊
2013 International Conference on Manipulation, Manufacturing and Measurement on the Nanoscale
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