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2017 IEEE International Conference on Manipulation, Manufacturing and Measurement on the Nanoscale (3M-NANO)最新文献

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A novel method for calibration of tool run-out in micro end-milling 一种新的微立铣刀动差标定方法
Yudong Zhou, Yanling Tian, Fujun Wang, Xiubing Jing, Xiang Cai
In the process of micro end-milling, the axis of the micro end-mill does not coincide with the spindle axis on account of the inherent assembly errors, which is named as tool run-out. Tool run-out has a significant effect on the cutting force and surface topography predictions, and thus, accurate calibration of tool run-out is of vital importance. In this paper, a novel method was proposed to calibrate the tool run-out in micro end-milling operation, in which both axes offset and tilt were taken into consideration. The suggested method is easy to perform, and the calibration process is based on the analysis of the measured contour variations and phase shifts at different axial sections. Further, the verification tests were conducted to confirm the effectiveness of the proposed method, and the verification results show that the calibration accuracy is sufficient to capture the tool deviation.
在微立铣削加工过程中,由于固有的装配误差,导致微立铣刀的轴线与主轴轴线不重合,称为刀具跑偏。刀具跳动对切削力和表面形貌的预测有重要影响,因此刀具跳动的准确校准至关重要。提出了一种同时考虑轴向偏移和轴向倾斜的微立铣刀动差标定方法。该方法操作简单,校正过程基于对不同轴向截面的测量轮廓变化和相移的分析。通过验证试验,验证了该方法的有效性,验证结果表明,标定精度足以捕获刀具偏差。
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引用次数: 1
Fabrication of submicron structures on transparent quartz glasses with improved optical properties 光学性能改善的透明石英玻璃上亚微米结构的制备
Dongyang Zhou, Litong Dong, Ziang Zhang, Mengnan Liu, Ying Wang, Yuegang Fu, Zuobin Wang
This paper presents a method for the fabrication of submicron structures on transparent quartz glasses to improve optical properties. In this work, the submicron structures were fabricated by two-beam dual exposure laser interference lithography (LIL) and inductively coupled plasma-reactive ion etching (ICP-RIE). The reflectance of less than 5% and the transmittance of more than 95% were achieved in the visible and infrared range of light from 490nm to 1100nm. The experiment results have shown that this method is simple and efficient for the large-area fabrication of submicron structures on transparent quartz glasses with improved optical properties for many applications such as optical components and devices in optical engineering.
本文提出了一种在透明石英玻璃上制备亚微米结构以改善其光学性能的方法。本文采用双光束双曝光激光干涉光刻(LIL)和电感耦合等离子体反应离子蚀刻(ICP-RIE)制备了亚微米结构。在490nm ~ 1100nm的可见光和红外光范围内,反射率小于5%,透过率大于95%。实验结果表明,该方法简单有效,可在透明石英玻璃上大面积制备亚微米结构,光学性能得到改善,可用于光学元件和光学工程器件等多种应用。
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引用次数: 0
Independent control of nanoparticle clusters 纳米颗粒簇的独立控制
Mostafa Alaa, A. Klingner, N. Hamdi, Slim Abdennadher, I. Khalil
Independent motion control of several magnetic agents at micro scale is essential in diverse biomedical and nano-technology applications. In this study, we achieve closed-loop motion control of multiple clusters of iron-oxide nanoparti-cles using an electromagnetic system. This system consists an array of parallel in-plane electromagnetic coils. We devise a control algorithm based on round-robin scheduling paradigm to achieve simultaneous control of multiple clusters of iron-oxide nanoparticles. This proposed control strategy allows us to exert primary and auxiliary magnetic forces and achieve independent positioning of multiple clusters at average speeds of 8125±500 ¡m/s (mean±s.d.) and 617±400μm/s, respectively.
在不同的生物医学和纳米技术应用中,几种磁性介质在微观尺度上的独立运动控制至关重要。在这项研究中,我们使用电磁系统实现了多簇氧化铁纳米颗粒的闭环运动控制。该系统由一组平行的平面内电磁线圈组成。设计了一种基于循环调度模式的控制算法,实现了对多簇氧化铁纳米颗粒的同时控制。该控制策略允许我们施加主磁力和辅助磁力,并在平均速度分别为8125±500 μm/s和617±400μm/s的情况下实现多个簇的独立定位。
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引用次数: 0
Silicon-based 3D electrodes for high power lithium-ion battery 高功率锂离子电池用硅基三维电极
Y. Zheng, J. Rakebrandt, H. Seifert, P. Smyrek, Wilhelm Pfleging, C. Kübel
The well-known drawbacks of silicon-based anode materials are the huge volume change resulting in film cracking, film delamination and pulverization of the active material. In order to reduce mechanical stress and to improve film adhesion, free-standing structures and modified current collector surfaces were generated by applying ultrafast laser processing. Freestanding structures were generated on pure silicon and silicon-doped graphite electrodes. Specific capacities were measured by galvanostatic cycling as function of C-rate. It could be shown that free-standing structures can compensate the volume changes which occur during electrochemical cycling. The capacity retention at high C-rates (> 0.5 C) was significantly improved. Moreover, laser-induced micro/nano-surface patterning was realized on copper current collectors, prior to deposition of pure silicon. Improvement of specific capacity could be achieved during electrochemical priming. The impact of 3D electrode architectures regarding cycle stability, capacity retention and cell lifetime will be discussed in detail.
硅基负极材料众所周知的缺点是体积变化大,导致活性材料的膜开裂、膜分层和粉末化。为了减小机械应力,提高薄膜的附着力,采用超快激光加工技术制备了独立结构和改性集流表面。在纯硅和掺硅石墨电极上生成了独立结构。比容量通过恒流循环作为c -速率的函数来测量。结果表明,独立结构可以补偿电化学循环过程中产生的体积变化。在高C率(> 0.5 C)下,容量保持率显著提高。此外,在纯硅沉积之前,在铜集流器上实现了激光诱导的微/纳米表面图案化。通过电化学注入可以提高比容量。将详细讨论3D电极结构对循环稳定性、容量保持和电池寿命的影响。
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引用次数: 4
CARS detection with diode lasers in digital holographic microscopy 数字全息显微镜中二极管激光器的CARS检测
V. Sainov, A. Baldzhiev, S. Sainov, K. Kostadinov
The subject of this paper is coherent anti-Stokes Raman scattering (CARS) detection of different groups at molecular level in cells with low-energy CW diode lasers in parallel and simultaneously with holographic recording. This is essential for the non-invasive 3D reconstruction and markers free labeling of biological objects. A laboratory version of the diode lasers microscopic system with attachment for spectral detection is presented. Experimental results for parallel holographic recording of fixed cells and detection of CARS signals from different groups at molecular level, including — (S-H), (C-H) and (=(CH)) are obtained. They shows an advantage of the used phase-stepping algorithm (PSA) over a Fast Fourier Transform (FFT) algorithm for phase retrieval. The sensitivity of the CARS detection with diode lasers is estimated and compared for the same objects with a standard Raman micro spectrometer. The developed system is compact, suitable to perform measurement in real-time operation mode, and promising for markers free labeling of holographical reconstructed 3D images of the cells with parallel recorded 2D pictures of the CARS signals.
本文的主题是利用低能量连续波二极管激光器并行和同步全息记录在分子水平上检测细胞中不同基团的相干反斯托克斯拉曼散射(CARS)。这对于生物物体的非侵入性三维重建和无标记标记至关重要。介绍了一种用于光谱检测的二极管激光显微系统的实验室版本。得到了固定细胞平行全息记录和在分子水平上检测- (S-H)、(C-H)和(=(CH))不同基团CARS信号的实验结果。他们展示了所使用的相位步进算法(PSA)比快速傅里叶变换(FFT)算法在相位检索方面的优势。估计了用二极管激光器探测CARS的灵敏度,并比较了用标准拉曼光谱仪探测相同物体的灵敏度。所开发的系统结构紧凑,适合实时操作模式下的测量,并且有望在细胞的全息重建三维图像与平行记录的CARS信号二维图像之间进行无标记标记。
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引用次数: 0
Study on surface quality of aluminum alloy 7075 precision micro cutting 7075铝合金精密微切削表面质量的研究
Jinkai Xu, Q. Du, Zhichao Wang, Huadong Yu
The micro cutting experiment of Aluminum alloy 7075 was carried out by using a self-developed orthogonal cutting experiment table. Single factor experiment was applied to study the influence of cutting speed and cutting depth on the surface quality of workpiece. The tool wear under different cutting conditions is also observed and analyzed. The experimental results show that the cutting depth and the cutting speed have a large effect on the tool wear. As the cutting speed increase, the machined surface roughness decreased at first and then increased, and the surface roughness increased gradually with the increase of cutting depth, and when the cutting speed v=300 mm/s, cutting depth ap=2μm, the minimum roughness value 0.283μm is obtained. When v=200 mm/s, ap=2μm, it will produce compressive residual stress (−10.7MPa) on the machined surface, but the residual stress will change from compressive stress to tensile stress when the cutting depth is greater than 5μm and increases with the increase of cutting depth.
利用自行研制的正交切削实验台,对7075铝合金进行了微切削实验。采用单因素实验研究了切削速度和切削深度对工件表面质量的影响。并对不同切削条件下的刀具磨损进行了观察和分析。实验结果表明,切削深度和切削速度对刀具磨损有较大影响。随着切削速度的增加,加工表面粗糙度先减小后增大,随着切削深度的增加,表面粗糙度逐渐增大,当切削速度v=300 mm/s,切削深度ap=2μm时,粗糙度最小值为0.283μm。当v=200 mm/s, ap=2μm时,在加工表面产生压残余应力(- 10.7MPa),但当切削深度大于5μm时,残余应力由压应力变为拉应力,并随着切削深度的增加而增大。
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引用次数: 0
Effect of deposition temperature and heat treatment on properties of AZO nanolamination films 沉积温度和热处理对AZO纳米层膜性能的影响
J. Guan, Q. Duanmu
Firstly, the AZO nanolaminated films are prepared on quartz and n-doped Si(100) substrate by atomic layer deposition (ALD). And the surface morphology, crystal structure and electrical properties of the films are analyzed and characterized by atomic force microscopy (AFM), X-ray diffraction (XRD) and high resistance tester. Thereafter the paper the effects of different substrate temperature is compared with heat treatment process on the structure and properties of the films. The effects of substrate temperature and annealing temperature on the structure and properties of the films are studied. Finally, the results of research indicates that the AZO nanolaminated film has a suitable temperature window. When the substrate temperature at least 170°C which meets the requirement of microchannel plate (MCP) dynode conductive layer film. At the same time, the resistivity of the film increases accordingly with temperature of annealing increasing, as proper annealing can help the structure of the film optimizing. The thin film resistance is supposed to be stable at 400°C annealing for 4h, which means it can be regarded as the option of MCP dynode conductive layer films in the future.
首先,采用原子层沉积法(ALD)在石英和n掺杂Si(100)衬底上制备了AZO纳米层膜。利用原子力显微镜(AFM)、x射线衍射仪(XRD)和高阻测试仪对膜的表面形貌、晶体结构和电学性能进行了分析和表征。然后比较了不同衬底温度和热处理工艺对薄膜结构和性能的影响。研究了衬底温度和退火温度对薄膜结构和性能的影响。最后,研究结果表明,AZO纳米层膜具有合适的温度窗。当衬底温度至少为170℃时,即满足微通道板(MCP)导电层薄膜的要求。同时,薄膜的电阻率随退火温度的升高而增大,适当的退火有利于薄膜结构的优化。在400℃退火4h时,薄膜电阻应该是稳定的,这意味着它可以被视为未来MCP dynode导电层薄膜的选择。
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引用次数: 1
Polymer-metal composites for sensitive detection of metabolites by mass spectrometry 质谱法检测代谢产物的聚合物-金属复合材料
Yiyi Cheng, D. Gurav, Xuming Sun, Ru Zhang, W. Xu, Lin Huang, Kun Qian
Novel polymer-metal hybrids were designed for highly efficient detection of amino acids. We prepared polymer spheres through extension of Stöber method. The polymeric sphere surface was decorated by metal nanoparticles via in-solution redox reaction. Detection of standard samples showed the nanoshell had significant advantages, e.g. for amino acids. The sensitivity of hybrids for detection of leucine was confirmed using standard analyte solution with different concentrations and serum samples. Our work provided an efficient tool for leucine detection and contributed to mass spectrometry analysis of amino acids for clinical diagnostics.
为高效检测氨基酸,设计了新型聚合物-金属杂合体。通过Stöber法的推广,制备了聚合物微球。通过溶液氧化还原反应,用金属纳米粒子修饰聚合物球表面。标准样品的检测表明,纳米壳具有显著的优势,例如氨基酸。用不同浓度的标准分析液和血清样品验证杂交体检测亮氨酸的灵敏度。本研究为亮氨酸的检测提供了一种有效的工具,并为临床诊断的氨基酸质谱分析做出了贡献。
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引用次数: 0
Study on roughness and residual stress of precision micro milling of high strength materials 高强度材料精密微铣削的粗糙度和残余应力研究
Jinkai Xu, Jingjing Liu, Zhichao Wang, Huadong Yu
To optimize the surface quality of high-strength metallic materials for micro-milling so that the workpiece has better mechanical properties, making micro-groove on aluminum alloy 7075 and stainless steel 0Cr18Ni9 by micro-milling respectively, using orthogonal test and 1mm diameter four-blade micro-milling cutter. The surface roughness and residual stress of each micro-channel are measured. The influence of the speed of the spindle, the feed rate and the depth of the feed on the surface roughness value and the residual stress value is studied by the difference analysis. The range analysis method is uesd to obtain the ideal combination of cutting process parameters. The results show that under the same milling conditions, the surface quality of the 7075 aluminum alloy is better than that of the stainless steel 0Cr18Ni9. In the processing of 7075 aluminum alloy, the feed rate has the greatest impact on the surface roughness value, and the spindle speed has the largest effect on the residual stress value; In the processing of stainless steel 0Cr18Ni9, the spindle speed has the maximum effect on the roughness value and the residual stress value. The results has a certain reference value for improving the surface quality of micro-machined high-strength metal materials.
为优化高强度金属材料的微铣削表面质量,使工件具有更好的力学性能,采用正交试验和直径为1mm的四刃微铣刀,分别在铝合金7075和不锈钢0Cr18Ni9上进行微铣削加工,形成微槽。测量了各微通道的表面粗糙度和残余应力。通过差值分析,研究了主轴转速、进给速度和进给深度对表面粗糙度值和残余应力值的影响。采用极差分析法,得到切削工艺参数的理想组合。结果表明:在相同铣削条件下,7075铝合金的表面质量优于不锈钢0Cr18Ni9;7075铝合金加工中,进给速度对表面粗糙度值影响最大,主轴转速对残余应力值影响最大;在0Cr18Ni9不锈钢加工中,主轴转速对粗糙度值和残余应力值的影响最大。研究结果对提高微加工高强度金属材料的表面质量具有一定的参考价值。
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引用次数: 0
Design and test on the nonlinear piezoelectric-electromagnetic hybrid energy harvesting structure 非线性压电-电磁混合能量收集结构的设计与试验
Haipeng Liu, Lei Jin, Shiqiao Gao
At present, the study of environmental vibration energy harvesting mainly concentrated in the hybrid energy harvester. In this paper, a nonlinear PE-EM hybrid harvesting structure is designed, and the nonlinear magnetic force is introduced in the hybrid structure to change the resonant frequency and the bandwidth of the harvester. The theoretical model of nonlinear hybrid harvester system is established. The experimental results of the nonlinear hybrid harvester show that the direction and size of the magnetic force have great influence on the performance of the nonlinear hybrid harvester and also show that the bandwidth of harvester is improved and the working frequency of harvester can be adjusted with the appearance of nonlinear magnetic force. And the designed nonlinear hybrid harvester has good environmental adaptability because the bandwidth increases.
目前,环境振动能量收集的研究主要集中在混合式能量采集器上。本文设计了一种非线性PE-EM混合收获结构,并在混合结构中引入非线性磁力来改变收获器的谐振频率和带宽。建立了非线性混合收割机系统的理论模型。非线性混合收割机的实验结果表明,磁力的方向和大小对非线性混合收割机的性能有很大的影响,并表明随着非线性磁力的出现,收割机的带宽得到改善,收割机的工作频率可以调节。由于带宽的增加,所设计的非线性混合收割机具有良好的环境适应性。
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引用次数: 0
期刊
2017 IEEE International Conference on Manipulation, Manufacturing and Measurement on the Nanoscale (3M-NANO)
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