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2022 IEEE International Conference on Manipulation, Manufacturing and Measurement on the Nanoscale (3M-NANO)最新文献

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Study on the Biomimetic Structure of Aluminum Alloy Surface Fabricated by Laser and Its Hydrophobic and Water-collecting Properties 激光制备铝合金表面仿生结构及其疏水性和集水性研究
Yingluo Zhou, Liancheng Ren, Wei Xiang, Liang Li, Hao Tang, Jing Li
At present, water shortage has become a difficult problem and hot spot that needs to be solved in the current society. In this paper, the processing method of laser and heat treatment is used to prepare the microstructure of imitation bottle grass on the surface of 7075 aluminum alloy. Under the premise of no chemical modification, the surface of the sample is made superhydrophobic, and the contact angle reaches more than 150°. At the same time, based on the special high and low rib structure of bottle grass, combined with the principle of contact line pinning and the classical nucleation theory, the bionic surface exhibits excellent water-collecting performance. After the water collection experiment test, it was found that the water collection amount of the prepared samples measured in the atmospheric environment was 7.40 times higher than that of the polished surface. Finally, the contribution of the hydrophobicity of the biomimetic surface to the water-harvesting ability is analyzed.
目前,水资源短缺已成为当今社会亟待解决的难题和热点。本文采用激光加热处理的加工方法,在7075铝合金表面制备仿瓶草微结构。在不进行化学改性的前提下,使样品表面超疏水,接触角达到150°以上。同时,基于瓶草特殊的高低肋结构,结合接触线钉扎原理和经典成核理论,仿生表面表现出优异的集水性能。经过集水实验测试,发现在大气环境下测得的制备样品的集水量比抛光表面的集水量高7.40倍。最后,分析了仿生表面的疏水性对集水能力的贡献。
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引用次数: 0
Study on Characterization Methods of Tip Radius of AFM Worn Probe AFM磨损探针针尖半径表征方法研究
Song Huang, Yanling Tian
AFM has a wide range of applications in scanning imaging and manufacturing of nanostructures. AFM probes often wear during the use of AFM, and the change of tip morphology will inevitably affect the accuracy of AFM measurement and processing. Therefore, it is necessary to characterize the morphology of AFM probe with wear. Since the tip size of AFM probe is nanoscale, traditional measurement methods cannot be used for observation, and the current common AFM tip morphology characterization methods are difficult to simultaneously meet the accuracy and convenience of measurement. In this paper, a method to characterize the tip radius of AFM worn probe was proposed. Nanoindentation operation was carried out on soft PVC sheet with worn probe, and Hertz model fitting was performed on the collected indentation loading curve to obtain the tip radius. In this paper, the elastic deformation depth of soft PVC sheet nanoindentation point is determined to be about 30 nm by finite element simulation, which is convenient for Hertz model fitting of elastic deformation segment of indentation loading curve in the follow-up. The AFM probe with different wear degree was measured by this characterization method, and the feasibility of this characterization model was verified based on SEM measurement results, and the scope of application of this characterization model was also proposed. This characterization method can realize the in-situ measurement of tip radius of AFM worn probe, and the tip will not be further worn during the measurement process, which can realize the accuracy and convenience of AFM tip measurement.
原子力显微镜在纳米结构的扫描成像和制造中有着广泛的应用。AFM探针在AFM使用过程中经常磨损,针尖形貌的变化必然会影响AFM测量和加工的精度。因此,有必要对AFM探针的磨损形貌进行表征。由于AFM探针尖端尺寸为纳米级,传统的测量方法无法进行观察,目前常用的AFM探针尖端形貌表征方法难以同时满足测量的准确性和便捷性。提出了一种表征AFM磨损探针尖端半径的方法。采用磨损探针对软PVC片材进行纳米压痕操作,对采集到的压痕加载曲线进行Hertz模型拟合,得到尖端半径。本文通过有限元模拟确定软PVC片材纳米压痕点的弹性变形深度约为30 nm,便于后续压痕加载曲线弹性变形段的Hertz模型拟合。采用该表征方法对不同磨损程度的AFM探针进行了测量,并根据SEM测量结果验证了该表征模型的可行性,同时提出了该表征模型的适用范围。该表征方法可以实现AFM磨损探针尖端半径的原位测量,并且在测量过程中不会进一步磨损尖端,实现了AFM尖端测量的准确性和便捷性。
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引用次数: 0
Micro/Nanostructured Cathode and Anode Induced by Femtosecond Laser for Ni//Zn Battery 飞秒激光诱导镍/锌电池的微/纳米结构阴极和阳极
Hui Xiao, Zhen Yang, Yuandong Tian, Faze Chen, Chengjuan Yang
In this work, bimetallic hydroxide (Ni and Co) was electrochemically deposited on femtosecond laser-induced Ni foil as aqueous rechargeable Ni//Zn battery cathode (denoted as LNF@NiCo-OH). The fs laser fabricated Zn was used as anode (denoted as LZF). The obtained Ni//Zn battery (denoted as LNF@NiCo-OH//LZF) could deliver outstanding cycling performance (no capacity decay after 20000 charge-discharge cycles), ultrahigh energy density (0.782 mW h cm−2) and power density (80.25 mW cm−2). These advantages may endow the obtained Ni//Zn battery to meet the demand of next-generation energy storage devices.
在这项工作中,双金属氢氧化物(Ni和Co)电化学沉积在飞秒激光诱导的Ni箔上,作为水可充电的Ni/ Zn电池阴极(记为LNF@NiCo-OH)。采用fs激光制备的Zn作为阳极(记为LZF)。所制备的Ni/ Zn电池(表示为LNF@NiCo-OH//LZF)具有优异的循环性能(20000次充放电循环后容量无衰减),超高的能量密度(0.782 mW h cm−2)和功率密度(80.25 mW cm−2)。这些优点可以使所获得的Ni/ Zn电池满足下一代储能设备的需求。
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引用次数: 0
Characterization of Cell Response on Patterned Stiffness Substrate by AFAM 用AFAM表征细胞对图案刚度基底的响应
Yan Liu, Zuobin Wang, Yang Yang
The stiffness of extracellular matrix strongly influences cells behavior, but characterization of substrate stiffness patterns is a challenge. In our study, atomic force acoustic microscopy (AFAM) was used to study the cell responses on substrate stiffness patterns. The nano-stripe stiffness pattern was imprinted on SU-8 film. Our results show that AFAM acoustic images can detect both the cell surfaces and the stiffness pattern on the SU-8 substrate. We find that the cells significant deformation on the patterned stiffness substrate. Moreover, when using cytochalasin-D to interfere actin filaments, there is a significantly decrease in cell area for cells seeded on the patterned stiffness substrate. This study provides new information for the design and characterization of extracellular matrix interfaces, and contributes to the understanding of cell-substate interactions.
细胞外基质的刚度强烈影响细胞的行为,但表征基质刚度模式是一个挑战。在我们的研究中,原子力声学显微镜(AFAM)被用来研究细胞对基底刚度模式的反应。在SU-8薄膜上刻印了纳米条纹刚度图案。结果表明,AFAM声学图像可以检测到SU-8基板上的细胞表面和刚度模式。我们发现细胞在有图案的刚度基底上有明显的变形。此外,当使用细胞松弛素d干扰肌动蛋白丝时,在有图案的硬度底物上播种的细胞的细胞面积显着减少。该研究为细胞外基质界面的设计和表征提供了新的信息,并有助于理解细胞-亚态相互作用。
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引用次数: 0
Chatter Detection Based on Wavelet Packet Energy Entropy 基于小波包能量熵的颤振检测
He Yang, Xiubing Jing, Zehui Zheng, Peng Shang
Chatter is one of the crucial factors affecting the quality of machining. In severe cases, chatter can reduce productivity and cause huge economic losses. A chatter detection index based on the wavelet packet energy entropy (WPEE) is put forward in this paper. To determine the feasibility of the index, the acceleration sensor is used to obtain the vibration signal of machining. Four tests that can be separated into two parts (stable and chatter) are selected to discuss. The results demonstrate that the proposed index can effectively distinguish chatter phenomenon in the milling process.
颤振是影响加工质量的重要因素之一。在严重的情况下,颤振会降低生产率并造成巨大的经济损失。提出了一种基于小波包能量熵的颤振检测指标。为了确定指标的可行性,利用加速度传感器获取加工时的振动信号。选取可分为两部分(稳定试验和颤振试验)的四个试验进行讨论。结果表明,该指标能有效地区分铣削过程中的颤振现象。
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引用次数: 0
Anisotropy of the Fracture of Single Crystal Silicon Studied by Nonlinear Surface Acoustic Waves 用非线性表面声波研究单晶硅断裂的各向异性
Zaiwei Liu, B. Lin, Xiaokang Ma
Due to the elastic nonlinearity of the material, high-amplitude surface acoustic waves (SAWs) undergo nonlinear sharpening during propagation, which may introduce damage or produce modification of material microstructure. For single crystal silicon, the nonlinear evolution of SAWs and the resulting dynamic fracture depend on the free-surface orientation and direction of propagation. To investigate the effect of the geometries on behavior of SAWs, we performed molecular dynamics simulations of the nonlinear evolution of SAWs on the single crystal silicon surface. The second-order nonlinear coefficient is used to quantify the degree of nonlinear evolution of SAWs. In addition, the critical strength of the {111} plane of silicon is evaluated based on the SAW nonlinear evolution method.
由于材料的弹性非线性,高振幅表面声波在传播过程中会发生非线性锐化,从而引起材料微观结构的损伤或改变。对于单晶硅,saw的非线性演化和由此产生的动态断裂取决于自由面取向和传播方向。为了研究几何形状对saw行为的影响,我们对saw在单晶硅表面的非线性演化进行了分子动力学模拟。二阶非线性系数用来量化saw的非线性演化程度。此外,基于SAW非线性演化方法对硅{111}平面的临界强度进行了评估。
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引用次数: 0
Robot Autonomous Assembly Task Understanding Based on Information Mining 基于信息挖掘的机器人自主装配任务理解
L. Meng, Weiping Fu, Jia Liu
Aiming at the problems in the production process of multi-variety, small-batch, and high flexibility products, the complex process files need to be translated into a data formatthat can be recognized by robot directly, this traditional way will lead to an inaccurate understanding of the process information, useful information miss, low efficiency and other issues, a semantic understanding method of complex product assembly based on information mining is proposed. Taking the assembly process document of a certain type of regulating valve as anexample, the key information of the assembly process documentis extracted and the domain professional lexicon is established, the apriori algorithm is used to mine the matching relation between production parts and tools by extracting historical process records. According to the information organization form of entity-attribute-entity, the knowledge graph is established to associate the multi-source heterogeneous information needed by the robot assembly.
针对多品种、小批量、高柔性产品生产过程中,复杂的工艺文件需要转换成机器人可以直接识别的数据格式,这种传统方式会导致对工艺信息理解不准确、有用信息缺失、效率低等问题,提出了一种基于信息挖掘的复杂产品装配语义理解方法。以某型调节阀装配工艺文档为例,提取装配工艺文档的关键信息,建立领域专业词汇,通过提取历史工艺记录,利用先验算法挖掘生产零件与工具的匹配关系。根据实体-属性-实体的信息组织形式,建立知识图谱,将机器人装配所需的多源异构信息关联起来。
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引用次数: 0
Effects of Femtosecond Laser Ablation Regimes on the Formation and Evolution of Periodic Structures 飞秒激光烧蚀对周期结构形成和演化的影响
Song Lin, Yaowen He, Suo Wang, Jingquan Lin, H. Tao
Fabrication of metal and semiconductor surface periodic structures (LIPSS) by femtosecond laser is a hot topic in ultrafast laser fabrication recently. Developments of formation and evolution of the LIPSS period have received extensive attention because of its great application value and complex physical background. It is well known that increase of single pulse energy density and cumulative pulse number will eventually lead LIPSS period to be fuzzy or disappearance. In this paper, a new phenomenon has been found that the LIPSS appears damaged or disappears in the medium laser fluence range from $boldsymbol{23.4} mathbf{mJ}/mathbf{cm}^{boldsymbol{2}}$ to $boldsymbol{52.6} mathbf{mJ}/mathbf{cm}^{boldsymbol{2}}$, in addition, the opposite law of LIPSS evolution was observed in this experiment. According to the experimental results, this phenomenon is attributed to the difference of femtosecond laser ablation mechanisms in different laser fluence intervals, and the effects of these two mechanisms on the LIPSS periodic evolution are discussed. This study extends our deep understanding of the mechanism of femtosecond laser-induced LIPSS formation, and provides a certain reference value for future application transformation and reasonable control of experimental parameters to optimize the preparation of LIPSS.
飞秒激光制备金属和半导体表面周期结构(LIPSS)是近年来超快激光制备领域的研究热点。LIPSS期形成演化的发展因其巨大的应用价值和复杂的物理背景而受到广泛关注。众所周知,单脉冲能量密度和累计脉冲数的增加最终会导致LIPSS周期模糊或消失。本文发现在$boldsymbol{23.4} mathbf{mJ}/mathbf{cm}^{boldsymbol{2}}$到$boldsymbol{52.6} mathbf{mJ}/mathbf{cm}^{boldsymbol{2}}$范围内LIPSS出现损伤或消失的新现象,并在实验中观察到与LIPSS相反的演化规律。实验结果表明,这一现象是由于飞秒激光烧蚀机制在不同的激光能量间隔内存在差异,并讨论了这两种机制对LIPSS周期演化的影响。本研究拓展了我们对飞秒激光诱导LIPSS形成机理的深入认识,为今后的应用转化和合理控制实验参数优化LIPSS的制备提供了一定的参考价值。
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引用次数: 0
Research on Electrochemical Machining with Synchronization of Pulse Current and Low-frequency Vibration 脉冲电流与低频振动同步的电化学加工研究
Jin Tao, Jinkai Xu, Wanfei Ren
As a method of precision electrochemical machining, the principle of pulse and vibration synchronized electrochemical machining is complex. In this work, a multi physical field coupling model of pulse and vibration synchronized electrochemical machining including electric field, gas-liquid two-phase flow field and temperature field was established. The changes of electrolyte temperature, electrolyte flow velocity, bubble volume fraction and electrolyte conductivity in end gap with vibration period were analyzed. In addition, the experiment was carried out on the precision electrochemical machining equipment with the same process parameters as the simulation parameters, and the workpiece with taper of 0.9º, end surface roughness of 0.134 µm and side surface roughness of 0.586 µm was machined. The pulse and vibration synchronized electrochemical machining can improve machining accuracy and machining quality. The research results have important guiding significance for practical machining.
脉冲与振动同步电解加工作为一种精密电化学加工方法,其原理复杂。建立了脉冲与振动同步电解加工的多物理场耦合模型,包括电场、气液两相流场和温度场。分析了电解液温度、电解液流速、气泡体积分数和电解液电导率随振动周期的变化规律。此外,在与仿真参数相同工艺参数的精密电化学加工设备上进行实验,加工锥度为0.9º、端面粗糙度为0.134µm、侧面粗糙度为0.586µm的工件。脉冲与振动同步电解加工可以提高加工精度和加工质量。研究结果对实际加工具有重要的指导意义。
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引用次数: 1
Multi-feature Based Estimation of Microstructure Position and Orientation 基于多特征的微结构位置和取向估计
Zheng Xu, Yifan Yang, Gang Han, Xiaodong Wang, Yanqi Wang, Hongyuan Du
Various micromanipulations require the assessment of the target's position and orientation (PO) under microscopic vision. Here a universal method based on multi-feature fusion and discrimination correlation filtering (DCF) is suggested to improve the accuracy of PO estimation. A continuous convolution operator is first introduced to achieve multi-feature fusion and sub-pixel localization for high-precision location estimation. Then, by decoupling the translation and rotation with Fourier-Mellin transformation, the orientation information is expressed using rotation features retrieved. Finally, the mutual correction mechanism is used to merge position estimation and orientation estimation into a framework. In experiments, 4 pixels of position estimation error and 0.3 degrees of orientation estimation error were achieved.
各种显微操作需要在显微视觉下评估目标的位置和方向。本文提出了一种基于多特征融合和判别相关滤波(DCF)的通用方法来提高PO估计的精度。首先引入连续卷积算子实现多特征融合和亚像素定位,实现高精度定位估计。然后,通过傅里叶-梅林变换解耦平移和旋转,利用检索到的旋转特征表示方向信息。最后,利用相互校正机制将位置估计和方向估计合并到一个框架中。在实验中,实现了4像素的位置估计误差和0.3度的方向估计误差。
{"title":"Multi-feature Based Estimation of Microstructure Position and Orientation","authors":"Zheng Xu, Yifan Yang, Gang Han, Xiaodong Wang, Yanqi Wang, Hongyuan Du","doi":"10.1109/3M-NANO56083.2022.9941625","DOIUrl":"https://doi.org/10.1109/3M-NANO56083.2022.9941625","url":null,"abstract":"Various micromanipulations require the assessment of the target's position and orientation (PO) under microscopic vision. Here a universal method based on multi-feature fusion and discrimination correlation filtering (DCF) is suggested to improve the accuracy of PO estimation. A continuous convolution operator is first introduced to achieve multi-feature fusion and sub-pixel localization for high-precision location estimation. Then, by decoupling the translation and rotation with Fourier-Mellin transformation, the orientation information is expressed using rotation features retrieved. Finally, the mutual correction mechanism is used to merge position estimation and orientation estimation into a framework. In experiments, 4 pixels of position estimation error and 0.3 degrees of orientation estimation error were achieved.","PeriodicalId":370631,"journal":{"name":"2022 IEEE International Conference on Manipulation, Manufacturing and Measurement on the Nanoscale (3M-NANO)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128038600","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
期刊
2022 IEEE International Conference on Manipulation, Manufacturing and Measurement on the Nanoscale (3M-NANO)
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