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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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3D Periodic Patterns Using Polarization Controlled $3+1$ Beams Interference 使用偏振控制的$3+1$光束干涉的3D周期图案
Yukai Wang, Litong Dong, Lu Wang, Mengnan Liu, Zhibo Zhang, Zuobin Wang, Dayou Li, Renxi Qiu
In this work, we studied the influence of polarizations in the 3D-light field formed by a multi-beam amplitude interference strategy. The 3D periodic structures are created by $3+1$ beams interference. A comparative study using MATLAB simulation has been performed to visualize the effect of diverse polarization modes on the formation of 3D intensity patterns. Based on the multi-beam amplitude interference strategy, varied 3D periodic structures can be designed by tuning the polarization mode of the coherent beams, which provide design ideas for the manufacture of large-area 3D crystal structures.
在这项工作中,我们研究了偏振对多波幅干涉策略形成的3d光场的影响。三维周期结构由$3+1$光束干涉产生。利用MATLAB仿真进行了对比研究,可视化了不同偏振模式对三维强度模式形成的影响。基于多波束振幅干涉策略,通过调整相干波束的偏振模式可以设计出不同的三维周期结构,为制造大面积三维晶体结构提供了设计思路。
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引用次数: 0
Creating Vascularized Structure by Microfluidic Chip Technology 用微流控芯片技术制造血管化结构
Chao Kang, Miaomiao Wang, Shu-Xian Zheng
Organoid is a hot research field in recent years. It can imitate the natural structure, produce spatial tissues similar to the corresponding organs, and reproduce some functions of the corresponding organs, so as to provide a highly physiologically related system. However, vascularization is still one of the biggest challenges faced by organoids. In the field of microfluidic technology, vascularization can be achieved by many methods. Recently, the rapid development of biological 3D printing technology has attracted extensive attention because of its advantages such as fast and wide application range. Therefore, this paper proposes an easy to operate, low-cost, open source, commercially available biological 3D printing systems as a solution to realize vascularization in the field of microfluidics. The printer is equipped with a coaxial printing needle and uses sodium alginate and calcium chloride as materials to print hollow, vascular like hydrogel structures to solve the problem of vascularization in the filed of organoids. The influence of the flow rate and moving speed of the extrusion head on the print quality is also discussed, and the best print window is finally obtained. The printing system is applicable to a variety of materials and provides a new idea for the realization of vascularization.
类器官是近年来研究的热点。它可以模仿自然结构,产生与相应器官相似的空间组织,并复制相应器官的某些功能,从而提供一个高度生理相关的系统。然而,血管化仍然是类器官面临的最大挑战之一。在微流控技术领域,血管化可以通过多种方法实现。近年来,生物3D打印技术以其快速、广泛的应用范围等优势得到了广泛的关注。因此,本文提出了一种易于操作、低成本、开源、可商用的生物3D打印系统,作为实现微流体领域血管化的解决方案。该打印机配备同轴打印针,以海藻酸钠和氯化钙为材料,打印中空的、血管状的水凝胶结构,解决类器官领域的血管化问题。讨论了挤出头的流量和移动速度对打印质量的影响,最终得到了最佳的打印窗口。该打印系统适用于多种材料,为血管化的实现提供了新的思路。
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引用次数: 0
Slippery Liquid-infused Surface with Controllable Droplet Self-transport by Femtosecond Laser 飞秒激光可控制液滴自输运的光滑液体注入表面
Chengjuan Yang, K. Yang, Zhen Yang, Minxia Li, Dawei Zhang
The slippery liquid-infused microstructure surface (SLIMS) could significantly reduce the adhesive force and facilitate the movement of droplet. However, the self-transport distance is still limited by the wedge angle and droplet volume. In this paper, the V-shaped prism microarray (VPM) surface processed by the femtosecond laser was introduced into the SLIMS to control the droplet self-transport distance. Benefited from the directional wettability of the VPM surface, the self-transport distance could be controlled in the case of fixed liquid volume and wedge angle. Meanwhile, the mechanism of droplet transport distance variation on the multi-bioinspired surface is also investigated. The results provide a new insight for precise liquid manipulation, which could promote droplet directional transport applications in both industrial and academic fields.
光滑的液体注入微结构表面(SLIMS)可以显著降低液滴的粘附力,促进液滴的运动。然而,自输运距离仍然受到楔角和液滴体积的限制。本文将飞秒激光加工的v形棱镜微阵列(VPM)表面引入到SLIMS中,以控制液滴的自输运距离。利用VPM表面的定向润湿性,在液体体积和楔角一定的情况下,可以控制自输运距离。同时,研究了液滴在多生物激励表面上输运距离变化的机理。研究结果为液滴定向输运在工业和学术领域的应用提供了新的思路。
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引用次数: 0
Research on MTF Measurement Technology of AR/VR Optical Modules AR/VR光模块MTF测量技术研究
Lianjun Zhao, Pengbo Feng, Ying Qin, Xichen Liu, Xinxin Han, Zhiting Li
MTF is an important method to evaluate the quality of VR products, and the selection of target is of great significance to the measurement accuracy of MTF. In this paper, the influence of slit incline angle, width and machining accuracy on MTF measurement are analyzed. Controlling the inclination angle of the slit can accurately measure the imaging quality of VR/AR products and ensure the qualification rate of products. According to the characteristics of human eyes, the appropriate slit width will ensure that the cut-off frequency of human eyes is within the measured effective frequency. By analyzing the influence of slit machining accuracy on MTF, slit machining can be industrialized on the premise of ensuring measurement accuracy.
MTF是评价虚拟现实产品质量的重要方法,目标的选择对MTF的测量精度具有重要意义。分析了狭缝倾角、狭缝宽度和加工精度对MTF测量的影响。控制狭缝的倾角可以准确测量VR/AR产品的成像质量,保证产品的合格率。根据人眼的特点,适当的狭缝宽度可以保证人眼的截止频率在测量的有效频率范围内。通过分析狭缝加工精度对MTF的影响,在保证测量精度的前提下实现狭缝加工产业化。
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引用次数: 0
Biomechanical Property Changes of Hepatocytes in Response to Alcohol Detected by Atomic Force Microscope 原子力显微镜观察酒精对肝细胞生物力学特性的影响
Shengli Zhang, Z. Weng, Zuobin Wang, Yi Zeng, Bowei Wang, Jiani Li
Hepatocyte injury caused by alcohol stimulation is the main cause of alcoholic liver disease (ALD). In order to understand the damage mechanism of alcohol, the changes of cells were quantitatively characterized. In this work, alcoholic hepatocyte injury was studied by atomic force microscopy (AFM). The results showed that the height of hepatocytes was increased under the action of alcohol. Meanwhile, the adhesion and elastic modulus of cells were decreased. There is a close relationship between the cell structure, morphology and biophysical properties.
酒精刺激引起的肝细胞损伤是酒精性肝病的主要病因。为了了解酒精的损伤机制,定量表征了细胞的变化。本研究采用原子力显微镜(AFM)研究了酒精性肝细胞损伤。结果表明,酒精作用下肝细胞高度增高。同时,细胞的黏附量和弹性模量降低。细胞的结构、形态与生物物理性质有着密切的关系。
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引用次数: 0
Research on the Adsorption Capacity of Different Forms of Activated Carbon on Creatinine 不同形式活性炭对肌酐吸附性能的研究
Gan Zhang, Xuebin Liang, Guangle Qin, Jingjie Sha
End-stage renal disease is a global health problem and a wearable artificial kidney (WAK) can effectively reduce the restrictive time required for dialysis treatment. The dialysate purification system is a key module in the WAK, which removes various nanotoxins from used dialysate. In this paper, activated carbon was used to remove creatinine, a nanotoxin, and the differences in adsorption performance of different types of activated carbon and their influencing factors were discussed in detail through a series of experiments, and finally the best adsorption performance of activated carbon microspheres was concluded. This is a great help for the subsequent design of the purification system.
终末期肾脏疾病是一个全球性的健康问题,可穿戴式人工肾脏(WAK)可以有效减少透析治疗所需的限制性时间。透析液净化系统是WAK的关键模块,它可以从使用过的透析液中去除各种纳米毒素。本文以活性炭去除纳米毒素肌酐为研究对象,通过一系列实验,详细讨论了不同类型活性炭吸附性能的差异及其影响因素,最终得出活性炭微球的最佳吸附性能。这对后续净化系统的设计有很大的帮助。
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引用次数: 0
Novel 2D Materials-based Resistive Devices 新型二维材料电阻器件
Yanming Liu, H. Tian
Resistive Random Access Memory (RRAM) has been widely investigated for its great synaptic and in-memory computing characteristic. Here, four kinds of novel RRAM or RRAM-based devices' structure have been developed, including graphene inserted RRAM, gate tunable RRAM, SnSe-RRAM, RRAM-based MoS2 filament transistor. The graphene inserted RRAM improve the device-to-device and cycle-to-cycle stability. Moreover, its optimization makes devices more suitable for neuromorphic computing. The gate tunable RRAM allow devices to have more tunable dimensions, allowing finer tuning of resistive states. The SnSe-RRAM has a double-layer integrated RRAM structure, which leads to stochastic and flexible resistive converting. The RRAM-based MoS2 filament transistor has quasi-0D contact characteristic, which shows record high On/Off ratio. These results demonstrated that structural optimization of RRAM still has great room for exploration, which leads to higher device integration and more applications.
电阻式随机存取存储器(RRAM)因其强大的突触和内存计算特性而受到广泛的研究。在这里,开发了四种新型RRAM或基于RRAM的器件结构,包括石墨烯插入RRAM,栅极可调谐RRAM, SnSe-RRAM,基于RRAM的MoS2灯丝晶体管。石墨烯插入RRAM提高了器件到器件和周期到周期的稳定性。此外,它的优化使设备更适合神经形态计算。栅极可调RRAM允许器件具有更多可调尺寸,允许更精细地调整电阻状态。SnSe-RRAM具有双层集成RRAM结构,可实现随机和灵活的电阻转换。基于rram的MoS2灯丝晶体管具有准0d接触特性,显示出创纪录的高开/关比。这些结果表明,RRAM的结构优化仍有很大的探索空间,这将导致更高的器件集成度和更多的应用。
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引用次数: 0
Design and Application of Macro and Micro-combined Mechanism for Textured Surface Machining 织构表面加工宏微结合机构的设计与应用
Bingrui Lv, B. Lin, Z. Cao, Chun-Yu Liu, Pengcheng Zhao
Textured surfaces with excellent tribological properties have attracted extensive attention. However, it is very challenging to machine textured surfaces on ultra-smooth surfaces due to the difficulty of tool setting. In this paper, a macro and micro-combined mechanism is designed for machining micro-textures on ultra-smooth surfaces. A compliant tool holder is designed to solve the problem of precise tool setting. The static characteristics of the tool holder are evaluated by the compliance matrix method and finite element analysis. Then, the modals of tool holder are further analyzed by finite element analysis. Finally, the machining paths are simulated and four typical textured surfaces are machined on the developed prototype.
具有优异摩擦学性能的织构表面引起了广泛的关注。然而,由于刀具设置困难,在超光滑表面上加工纹理表面是非常具有挑战性的。本文设计了一种宏微结合机构,用于加工超光滑表面上的微织构。为了解决精密对刀问题,设计了一种柔性刀架。采用柔度矩阵法和有限元分析方法对刀柄的静态特性进行了评价。然后,通过有限元分析进一步分析了刀柄的模态。最后,对加工轨迹进行了仿真,并对四种典型的纹理曲面进行了加工。
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引用次数: 0
FE Simulation of Dead Metal Zone Corresponding to the Micro-cutting Process 微切削过程对应死金属区的有限元模拟
Yongqin Ren, Bowen Song, Xiubing Jing, Yun Chen
The past thirty years have seen increasingly rapid advances in the field of micro-cutting technology. However, due to the existence of the tool edge, the material flowing mechanism is different from the macro-cutting, which makes confusion of cutting force and energy when the cutting thickness decrease to a certain extent. Dead metal zone (DMZ) is an important component in the material flowing and plays a key role in the micro-cutting mechanism. In this study, multiple finite element (FE) simulations of cutting models were carried out to obtain the influence of thicknesses and materials on DMZ. The Arbitrary Lagrangian-Eulerian method is adopted in the simulation process to improve accuracy and avoid excessive deformation. The results showed that the position and size of DMZ are variable according to the thicknesses. While different materials also possess peculiar material flowing mechanisms, especially in hard materials, like titanium alloy.
近三十年来,微切削技术领域的发展日益迅速。但由于刀具刃口的存在,材料流动机理不同于宏观切削,使得切削厚度减小到一定程度时,切削力和能量出现混淆。金属死区是材料流动的重要组成部分,在微切削过程中起着关键作用。在本研究中,对切削模型进行了多次有限元模拟,以获得厚度和材料对非军事区的影响。仿真过程中采用任意拉格朗日-欧拉方法,提高了精度,避免了过大的变形。结果表明,随着厚度的变化,DMZ的位置和大小是可变的。而不同的材料也具有独特的材料流动机制,特别是在硬质材料中,如钛合金。
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引用次数: 0
Design of a Three Degree of Freedom Nanopositioning Stage 三自由度纳米定位工作台的设计
Jiancheng Nie, Yuguo Cui, Pan Chen
A new type of simple and compact three degree of freedom parallel large-travel nano-piezoelectric stage is designed. First, a two-stage rhombus displacement amplifying mechanism is designed as the drive unit of the platform, and a spatially orthogonal arrangement is adopted. Then, based on four drive units with the same structure and located at the four corners of the base, a z-θx-θy stage with large displacement is designed. Finally, the static performance of the platform is tested by finite element simulation. The result shows that the travel of the platform along the z, θx and θy directions are 226.7 µm, 2.53 mrad and 2.56 mrad, respectively, and the natural frequencies are 251.81 Hz, 261.46 Hz and 261.46 Hz, respectively.
设计了一种结构简单、结构紧凑的三自由度并联大行程纳米压电工作台。首先,设计了两级菱形位移放大机构作为平台的驱动单元,并采用空间正交布置;然后,基于位于基座四角的四个相同结构的驱动单元,设计了一个大位移z-θx-θy级。最后,通过有限元仿真对平台的静态性能进行了测试。结果表明:平台沿z、θx和θy方向的行程分别为226.7 μ m、2.53 mrad和2.56 mrad,固有频率分别为251.81 Hz、261.46 Hz和261.46 Hz。
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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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