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2020 IEEE 33rd International Conference on Micro Electro Mechanical Systems (MEMS)最新文献

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Mechanical Tuning of Magnetic Anisotropy 磁各向异性的机械调谐
Pub Date : 2020-01-01 DOI: 10.1109/MEMS46641.2020.9056417
M. M. Torunbalci, S. Bhave
This paper demonstrates piezo-mechanical manipulation of magnetic anisotropy in a thin-film CoFeB ferromagnet (FM) via magnetostriction effect. A 20 nm thick CoFeB resistor is fabricated at the base of an AlN cantilever and its magnetization change is detected by measuring anisotropic magnetoresistance (AMR). The uniaxial strain induced in the CoFeB strip by cantilever bending exhibits a 22% change in AMR and rotates the magnetic anisotropy by 20°.
本文演示了利用磁致伸缩效应对CoFeB铁磁薄膜(FM)磁各向异性的压电机械操纵。在AlN悬臂梁底部制作了20nm厚的CoFeB电阻器,并通过测量各向异性磁阻(AMR)来检测其磁化变化。悬臂弯曲引起的CoFeB带材单轴应变的AMR变化22%,磁各向异性旋转20°。
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引用次数: 0
3D Microfluidic Device for Perfusion Culture of Spheroids 球体灌注培养的三维微流控装置
Pub Date : 2020-01-01 DOI: 10.1109/MEMS46641.2020.9056442
K. Nishimura, Minghao Nie, S. Takeuchi
We propose a 3D spheroid trapping device featured with a gel formed in the proximity with the spheroids to facilitate spheroid adhesion and perfusion. The device is composed of an upper channel to introduce pre-gel solutions, a bridge region to form a gel and a lower channel to trap a spheroid and perfuse culture media. Due to surface-tension-assisted microfluidic functions, a gel is formed only in the bridge region. The gel performs as an anchoring scaffold for spheroids and enables media perfusion. As a result of spheroid culture, angiogenic vascular sprouts were formed and the sprouts had branched lumen structure. We believe this device will contribute widely to biomedical studies.
我们提出了一种三维球体捕获装置,其特点是在球体附近形成凝胶,以促进球体的粘附和灌注。该装置由用于引入预凝胶溶液的上通道、用于形成凝胶的桥接区域和用于捕获球体并灌注培养基的下通道组成。由于表面张力辅助的微流控功能,凝胶只在桥区形成。凝胶可以作为球体的锚定支架,并使介质灌注成为可能。球型培养形成血管新生芽,芽具有分支管腔结构。我们相信这种装置将对生物医学研究做出广泛贡献。
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引用次数: 1
Comprehensive Analysis and Control of Diffusioosmosis-Driven Ionic Transport Through Interconnected Nanoporous Membranes 纳米孔膜扩散渗透驱动离子传输的综合分析与控制
Pub Date : 2020-01-01 DOI: 10.1109/MEMS46641.2020.9056409
Jongwan Lee, Kyunghun Lee, Cong Wang, Dogyeong Ha, Jungyul Park, Taesung Kim
We introduce a micro-/nanofluidic platform enabling the comprehensive analysis and control of diffusioosmosis (DO)-driven ionic transport through a nanochannel network. The nanochannel network is fabricated in the microfluidic channel by forming a membrane via the self-assembly of nanoparticles (i.e., self-assembled particle membrane, SAPM). This fabrication method allows to use various and different nanoparticles so that it is possible to modulate the material properties of the nanochannel network. Using the platform, we analyze the thermal effect on DO-driven ionic transport with various concentrations of electrolyte solutions with the aid of a temperature switching device (TSD).
我们介绍了一种微/纳米流体平台,可以全面分析和控制通过纳米通道网络的扩散渗透(DO)驱动的离子传输。纳米通道网络是通过纳米颗粒的自组装形成膜(即自组装颗粒膜,SAPM)在微流控通道中制备的。这种制造方法允许使用各种不同的纳米颗粒,从而有可能调节纳米通道网络的材料特性。利用该平台,我们借助温度开关器件(TSD)分析了不同浓度电解质溶液对do驱动离子输运的热效应。
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引用次数: 0
Modeling and First Characterization of Broad-Spectrum Vibration Rejection of Frequency Modulated Gyroscopes 调频陀螺仪广谱抗振的建模与初步表征
Pub Date : 2020-01-01 DOI: 10.1109/MEMS46641.2020.9056265
M. Bestetti, V. Zega, G. Langfelder
The work presents a detailed modeling and the first-ever characterization of a frequency modulated (FM) yaw gyroscope in presence of vibrations from low frequency (30 Hz), through the main modes, and up to 40 kHz. The gyroscope two in-plane axes (around 25 kHz) are operated under a Lissajous trajectory (70 Hz period) by an integrated circuit (IC) including oscillators, frequency digitization, and digital demodulation stages. In presence of $2-g_{pk-pk}$ vibrations, no effects are visible across the spectrum apart from the region including the modes. In this range, as predicted by theory, for each axis no effect is observed for accelerations at the axis resonance (< 0.1 dps/g), but a huge effect (tens of dps/g) is visible for accelerations at an offset frequency from resonance corresponding to the mode split.
这项工作提出了一个详细的建模和频率调制(FM)偏航陀螺仪在低频(30赫兹),通过主要模式,高达40千赫存在振动的首次表征。陀螺仪的两个平面内轴(约25 kHz)由集成电路(IC)组成,包括振荡器、频率数字化和数字解调级,在利萨焦轨迹(70 Hz周期)下运行。在$2-g_{pk-pk}$振动存在的情况下,除了包括模态的区域外,在整个光谱中没有可见的影响。在这个范围内,正如理论预测的那样,对于每个轴,在轴共振处的加速度(< 0.1 dps/g)没有观察到任何影响,但是对于与模式分裂对应的共振频率偏移的加速度,可以看到巨大的影响(数十dps/g)。
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引用次数: 2
A Fiber-Si3N4 Composite Nanoforest with High 7.6 to $11.6 mumathrm{m}$ Absorption for MEMS Infrared Sensors 用于MEMS红外传感器的高7.6 ~ 11.6 mu数学{m}$吸收的光纤- si3n4复合纳米森林
Pub Date : 2020-01-01 DOI: 10.1109/MEMS46641.2020.9056198
Chenchen Zhang, H. Mao, Meng Shi, J. Xiong, Kewen Long, Dapeng Chen
In this work, a fiber-Si3N4 composite nanoforest with high absorption in 7.6 to $11.6 mu mathrm{m}$ wavelength range is presented. Especially, when thickness of a Si3N4 coating reaches 300 nm, the nanoforest can achieve an average absorption as high as 88.12%. Such a composite nanoforest is fabricated based on an extremely simple process, including spin-coating and plasma treating of a polyimide layer, followed by deposition of a Si3N4 film. The process is fully compatible with conventional micromachining, thus the nanoforest can be integrated onto MEMS infrared (IR) sensors as an additional absorber. Furthermore, with such a composite nanoforest-based absorber, the IR sensors are expected to achieve higher performance, especially for human IR sensing.
在这项工作中,提出了一种在7.6 ~ 11.6 mu mathm {m}$波长范围内具有高吸收的光纤-氮化硅复合纳米森林。特别是当Si3N4涂层厚度达到300 nm时,纳米森林的平均吸收率高达88.12%。这种复合纳米森林是基于一个极其简单的过程制造的,包括自旋涂层和等离子体处理聚酰亚胺层,然后沉积一层氮化硅薄膜。该工艺与传统的微加工完全兼容,因此纳米森林可以集成到MEMS红外(IR)传感器上,作为额外的吸收器。此外,利用这种基于纳米森林的复合吸收剂,红外传感器有望实现更高的性能,特别是用于人体红外传感。
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引用次数: 0
Long-Rangeultrasound Wake-Up Receiver with a Piezoelectric Nanoscale Ultrasound Transducer (pNUT) 带压电纳米级超声换能器的远程超声唤醒接收器
Pub Date : 2020-01-01 DOI: 10.1109/MEMS46641.2020.9056287
Pietro Simeoni, Matteo Castellani, G. Piazza
We report on the first implementation of a long-range wake-up receiver (WuRx) enabled by an aggressively scaled 100 nm thick aluminum nitride transducer that occupies an area of only $100 mu mathrm{m} times 100 mu mathrm{m}$. This piezoelectric Nanoscale Ultrasound Transducer (pNUT) offers the same sensitivity and characteristic impedance of its microscale counterparts but enables “dust-like” WuRx because of its dramatically reduced size. We validate this concept by synthesizing a WuRx using a pNUT and off-the-shelf electronic components forming a voltage amplifier, an envelope detector and a comparator (Fig. 1). We demonstrate robust data transfer over a range of 0.5 m when operating with a 40 kHz carrier signal modulated at 250Hz. Based on these measurements we extrapolate the device performance at resonance to show that communication over> 10m is possible without increasing the WuRx area.
我们报告了远程唤醒接收器(WuRx)的第一个实现,该接收器由一个积极缩放的100纳米厚氮化铝传感器实现,该传感器仅占用$100 mu mathm {m} 乘以 100 mu mathm {m}$的面积。这种压电纳米级超声换能器(pNUT)提供了与微级同类产品相同的灵敏度和特性阻抗,但由于其尺寸显着减小,因此可以实现“粉尘状”的WuRx。我们通过使用pNUT和现成的电子元件合成WuRx来验证这一概念,这些电子元件组成了电压放大器、包络检测器和比较器(图1)。我们展示了在以250Hz调制的40 kHz载波信号下工作时,在0.5 m范围内的稳健数据传输。根据这些测量结果,我们推断出设备在共振时的性能,表明在不增加WuRx面积的情况下,通信超过10米是可能的。
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引用次数: 3
Concentric, Mems-Based Optoelectromechanical Pacer for Multimodal Cardiac Excitation 同心mems光电起搏器用于多模态心脏兴奋
Pub Date : 2020-01-01 DOI: 10.1109/MEMS46641.2020.9056115
Tobias Weber, C. Zgierski-Johnston, Eric Klein, S. Ayub, P. Kohl, O. Paul, P. Ruther
This paper reports on the fabrication, assembly, characterization and validation of a novel opto-electrical cardiac stimulator designed to augment a mechanical pacing device. The integration of miniaturized electrodes and blue light-emitting diode (LED) chips on the pacer tip with a diameter of 1 mm enables the application of multimodal stimuli in one location on the surface of isolated murine hearts. The opto-electrical stimulator is based on two separate polyimide (PI) substrates each with a thickness of $10 mu mathrm{m}$ combined into a functional unit based on dedicated assembly and encapsulation processes using silicone rubber. The experimental validation in isolated, whole hearts compares electrical, optical and mechanical stimuli exerted at frequencies of up to 8 Hz on Langen-dorff-perfused hearts expressing channelrhodopsin-2. The integrated iridium oxide electrodes implemented above the LED chips enable simultaneous electrical recordings of local cardiac electrical activity.
本文报道了一种新型光电心脏刺激器的制造、组装、表征和验证,该装置旨在增强机械起搏装置。微型电极和直径为1毫米的蓝色发光二极管(LED)芯片集成在起搏器尖端,可以在孤立的小鼠心脏表面的一个位置应用多模态刺激。光电刺激器基于两个独立的聚酰亚胺(PI)衬底,每个衬底的厚度为$10 mu mathm {m}$,结合成一个基于专用组装和使用硅橡胶封装工艺的功能单元。在分离的全心脏中进行的实验验证比较了以高达8赫兹的频率施加在表达通道视紫红质-2的兰根-多尔夫灌注心脏上的电、光和机械刺激。集成的氧化铱电极实现在LED芯片之上,可以同时记录局部心脏电活动。
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引用次数: 0
Massive Integration of Light Driving Gel Actuator for Single Cell Manipulation 用于单细胞操作的光驱动凝胶驱动器的大规模集成
Pub Date : 2020-01-01 DOI: 10.1109/MEMS46641.2020.9056395
Yuha Koike, Hiroki Wada, Y. Yokoyama, T. Hayakawa
We propose drive method of on-chip gel actuator using light irradiation for massive integration of gel actuators. The gel actuator is made of temperature responsive gel and patterned on a chip with light absorbing material. Thus, it can be driven by irradiation of light to control its temperature. By using this method, we can selectively drive an actuator among massively integrated actuators by irradiating patterned light and it can be applied to high-throughput cell manipulations. In this study, we demonstrated an example of cell manipulation by using this method. We made a flow channel for cell transportation by irradiating light. We succeeded in making straight channel by irradiating actuators with sheet laser. In this channel, we observed that motile cells moved and we succeeded in trapping the motile cells by turning off the laser and swelling the actuators.
为了实现凝胶致动器的大规模集成,提出了一种基于光照射的片上凝胶致动器驱动方法。凝胶致动器由温度响应凝胶制成,并在具有吸光材料的芯片上进行图案设计。因此,它可以通过光的照射来驱动以控制其温度。利用该方法,我们可以在大量集成的致动器中通过照射图案光来选择性地驱动致动器,并且可以应用于高通量的细胞操作。在这项研究中,我们展示了一个使用这种方法操作细胞的例子。我们通过光照制造了细胞运输的通道。我们用薄片激光照射致动器,成功地制造了直线通道。在这个通道中,我们观察到运动细胞移动,我们通过关闭激光和膨胀致动器成功地捕获了运动细胞。
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引用次数: 0
MEMS 2020 Keyword Index MEMS 2020关键词索引
Pub Date : 2020-01-01 DOI: 10.1109/mems46641.2020.9056329
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引用次数: 0
Self-Cleaning Drop Free Glass Operated by Acoustic Atomization/Oscillation for Autonomous Driving and IoT Technology 用于自动驾驶和物联网技术的声学雾化/振荡自清洁无滴玻璃
Pub Date : 2020-01-01 DOI: 10.1109/MEMS46641.2020.9056111
Seungmin Lee, Youngbin Hyun, Kang-Young Lee, Jeongmin Lee, S. Chung
This paper presents self-cleaning drop free glass (DFG) through acoustic atomization and oscillation for autonomous driving and IoT technology. The behavior of an oscillating droplet actuated by a ring-piezoactuator is investigated by high-speed images in a wide range of acoustic amplitudes and frequencies. The atomization and oscillation of a droplet are separately tested using prepared DFG samples. The droplet atomization remains tiny satellite droplets on the surface of the DFG after the operation, while the droplet oscillation clearly removes the droplet from the surface. The DFG can be used to efficiently clean water and viscous droplets generated on the surface of various optical sensors.
本文介绍了一种用于自动驾驶和物联网技术的声学雾化和振荡自清洁无滴玻璃(DFG)。利用高速图像研究了由环形压电致动器驱动的振荡液滴在宽声幅和频率范围内的行为。用制备好的DFG样品分别测试了液滴的雾化和振荡。操作后,液滴雾化使微小的卫星液滴留在DFG表面,而液滴振荡则明显地将液滴从表面移走。该DFG可用于高效清洁各种光学传感器表面产生的水和粘性液滴。
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引用次数: 0
期刊
2020 IEEE 33rd International Conference on Micro Electro Mechanical Systems (MEMS)
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