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2018 IEEE Micro Electro Mechanical Systems (MEMS)最新文献

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Transparent graphene-AZO/ZNO/glass surface acoustic wave device for electronics and lab-on-a-chip applications 用于电子和芯片上实验室应用的透明石墨烯- azo /ZNO/玻璃表面声波器件
Pub Date : 1900-01-01 DOI: 10.1109/MEMSYS.2018.8346487
Jian Zhou, D. Xiao, Z. X. Song, Ming Zhuo, Xuezhong Wu
This paper reports the fabrication of transparent surface acoustic wave (SAW) resonators using novel graphene-AZO composite structure as the transparent electrodes. Transparent SAW resonators exhibited resonant frequency of 88.2 MHz at wavelength of 32 μm. and signal amplitudes up to 18 dB were obtained with the transparency above 80%. Temperature sensing showed the transparent SAW device had a positive temperature coefficient of frequency of ∼24.6 ppm/K. Humidity sensing was also conducted, demonstrating its application in humidity environment. Moreover, particle concentration using the transparent SAW devices have been achieved, demonstrating the great potential for applications in transparent electronics and MEMS.
本文报道了以新型石墨烯-偶氮化氮复合结构作为透明电极制备透明表面声波谐振器。透明SAW谐振器在32 μm波长处的谐振频率为88.2 MHz。获得的信号幅值可达18 dB,透明度在80%以上。温度传感表明,透明SAW器件具有正温度系数,频率为~ 24.6 ppm/K。并进行了湿度传感,演示了其在湿度环境中的应用。此外,利用透明SAW器件实现了颗粒浓度,显示了在透明电子和MEMS中的巨大应用潜力。
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引用次数: 0
Sticker microfluidics: A toolbox of combinable sacrificial templates for instrument-free customization of complex microfluidic systems in one-piece 贴纸微流体:一个可组合的牺牲模板工具箱,用于复杂微流体系统的无仪器定制
Pub Date : 1900-01-01 DOI: 10.1109/MEMSYS.2018.8346505
Xiaochen Lai, Bingyu Lu, Haixia Yu, Dachao Li
This paper reports an all-in-one toolbox which allows instrument-free customization of integrated microfluidic systems. Unlike the modular design of combining multiple microfluidic chips in previous literatures, this work, for the first time, proposes a ‘template sticker’ method: sacrificial templates for microfluidic components are batch produced in the form of stickers and packaged into a toolbox; a wettability guided emulsion linking method is employed to thoroughly connect the sticker templates; the end user only need to combine various template stickers to create a customized, one-piece microfluidic system. The newly-proposed toolbox enables easy and rapid operation, providing the first instrument-free solution to the fabrication of an integrated complex microfluidic system. The fabricated device has well-defined microscale features and excellent flexibility while the whole process is inexpensive and time-saving, making the toolbox suitable for both batch production and device prototyping.
本文报告了一个一体化工具箱,它允许集成微流体系统的无仪器定制。与以往文献中多个微流控芯片组合的模块化设计不同,本工作首次提出了一种“模板贴纸”方法:将微流控组件的牺牲模板以贴纸的形式批量生产并封装到工具箱中;采用润湿性导向乳化液连接方法彻底连接粘贴模板;最终用户只需要组合各种模板贴纸来创建定制的一体式微流体系统。新提出的工具箱使操作简单快速,为集成复杂微流体系统的制造提供了第一个无仪器解决方案。制造的设备具有明确的微尺度特征和出色的灵活性,而整个过程价格低廉,节省时间,使工具箱适合批量生产和设备原型设计。
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引用次数: 0
High dynamic range CMOS-MEMS capacitive accelerometer array 高动态范围CMOS-MEMS电容式加速度计阵列
Pub Date : 1900-01-01 DOI: 10.1109/MEMSYS.2018.8346725
Metin G. Guney, Xiaoliang Li, V. P. Chung, J. Paramesh, T. Mukherjee, G. Fedder
This paper reports on the design and characterization of a high-g CMOS-MEMS capacitive accelerometer array with 92 mG bias stability and ± 50 kG designed input range with a validated 91 dB dynamic range. The on-chip integration of the read-out circuitry and the MEMS transducer minimizes sense-node parasitic capacitance, hence improving sensitivity and dynamic range. The small size and mass of individual accelerometer cells ensure high-g survivability. Averaging the signals from the accelerometer cells across the array improves the signal to noise ratio, hence improving the dynamic range.
本文报道了一种高g CMOS-MEMS电容式加速度计阵列的设计和特性,该阵列的偏置稳定性为92 mG,设计输入范围为±50 kG,动态范围为91 dB。读出电路和MEMS传感器的片上集成最大限度地减少了传感节点的寄生电容,从而提高了灵敏度和动态范围。单个加速度计单元的小尺寸和质量确保了高g存活率。对来自加速计单元的信号在整个阵列上进行平均可以提高信噪比,从而提高动态范围。
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引用次数: 12
Switchable liquid shutter for security and design of mobile electronic devices 可开关液体百叶窗,用于移动电子设备的安全性和设计
Pub Date : 1900-01-01 DOI: 10.1109/MEMSYS.2018.8346469
Jeongmin Lee, Yuna Park, S. Chung
This paper presents a new type of switchable liquid shutter for the security and design of mobile devices. The switching operation with sequential EWOD actuation and its response time are investigated using high-speed images. The operation of the liquid shutter mounted on a smartphone is successfully demonstrated for a proof of concept. The proposed liquid shutter not only allows a simple design to be easily miniaturized and integrated with electronic devices but also provides fast and robust switching operation.
针对移动设备的安全性和设计要求,提出了一种新型的可开关式液体百叶窗。利用高速图像研究了顺序EWOD驱动下的开关操作及其响应时间。安装在智能手机上的液体快门的操作成功地进行了概念验证。所提出的液体快门不仅允许简单的设计易于小型化和集成电子设备,而且还提供快速和强大的开关操作。
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引用次数: 2
Pneumatically driven PDMS micropillars for the investigation of cell-cell interaction 用于细胞-细胞相互作用研究的气动驱动PDMS微柱
Pub Date : 1900-01-01 DOI: 10.1109/MEMSYS.2018.8346555
Kaori Furuike, A. Shima, Y. Morimoto, S. Takeuchi
We propose pneumatically driven PDMS micropillars (PDMS actuator) for the investigation of intercellular communication at a single-cell level. Cells usually organize large and complex networks. For detailed investigation of intercellular communication, downsizing the network is important. In this device, cell-sized micropillars are actuated by air pressure so that the adjacent cells on micropillars contact each other at an arbitrary timing. This actuator is also able to give mechanical stretch to coupled cells. We believe that this technology would contribute to the study of single-cell analysis of intercellular communication and the relationship between intercellular communication and mechanical stress.
我们提出气动驱动的PDMS微柱(PDMS致动器)用于单细胞水平的细胞间通信研究。细胞通常组织大而复杂的网络。为了详细研究细胞间通信,缩小网络是很重要的。在这个装置中,细胞大小的微柱由气压驱动,使得微柱上相邻的细胞在任意时间相互接触。该致动器还能够给耦合单元提供机械拉伸。我们相信,该技术将有助于单细胞分析细胞间通讯以及细胞间通讯与机械应力的关系的研究。
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引用次数: 2
Acceleration insensitive hemispherical shell resonators using pop-up rings 使用弹出环的加速度不敏感半球形壳谐振器
Pub Date : 1900-01-01 DOI: 10.1109/MEMSYS.2018.8346716
M. M. Torunbalci, Sen Dai, A. Bhat, S. Bhave
This work introduces DICE (Deep Isotropic Chemical Etching) process for fabrication of highly symmetric 3D Hemispherical Shell Resonators (HSR) based on HNA etching of <111> silicon using a pop-up ring mask. The proposed method is used to fabricate 650 nm thick SiO2 hemispherical shell with a diameter of 180 μm, demonstrating a 3D symmetry of 99%. The quality factor (Q) of the wine glass n=2 mode is measured as 31542 at 100 kHz with a frequency mismatch of 512 Hz (Δf/fr=0.5%) between the two n=2 degenerate modes. COMSOL simulations show that a symmetric shell resonator has simultaneous shock insensitivity to in-plane and out-of-plane acceleration.
本研究介绍了基于硅的海航蚀刻工艺,利用弹出式环形掩模制造高度对称的三维半球壳谐振器(HSR)的DICE (Deep Isotropic Chemical Etching)工艺。利用该方法制备了厚度为650 nm、直径为180 μm的SiO2半球形壳,其三维对称性达到99%。葡萄酒杯n=2模态的质量因子(Q)在100 kHz时测量为31542,两个n=2简并模态之间的频率失配为512 Hz (Δf/fr=0.5%)。COMSOL仿真结果表明,对称壳腔对面内和面外加速度同时具有冲击不敏感性。
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引用次数: 9
An ultrasensitive humidity sensor based on SnO2-modified MoS2 nanocomposite at low-humidity range 基于sno2改性MoS2纳米复合材料的低湿度超灵敏湿度传感器
Pub Date : 1900-01-01 DOI: 10.1109/MEMSYS.2018.8346705
Ya-Lan Zhao, Bin Yang, Jingquan Liu, Xiang Chen, Xiaolin Wang, Chunsheng Yang
This paper reports an ultrasensitive capacitive humidity sensor for low-humidity detecting environment, which employs SnO2-modified MoS2 (SnO2/MoS2) hybrid nanocomposite film as sensing layer and interdigital electrodes with narrow gap of 15 μm on sapphire substrate. The testing results show that the sensor of SnO2/MoS2 (10: 1) composite has the best sensitivity of 387.5 μF/%RH at the humidity range of 0–20% relative humidity (RH). To our best knowledge, this sensitivity value is higher than that of all reported humidity sensors at low-humidity range. Moreover, the humidity sensor also has fast response (15s), little hysteresis and good repeatability.
本文报道了一种用于低湿检测环境的超灵敏电容式湿度传感器,该传感器采用SnO2修饰的MoS2 (SnO2/MoS2)杂化纳米复合薄膜作为传感层,并在蓝宝石衬底上采用窄间隙为15 μm的数字间电极。测试结果表明,SnO2/MoS2(10:1)复合材料的传感器在0 ~ 20%相对湿度(RH)范围内灵敏度最高,为387.5 μF/%RH。据我们所知,在低湿度范围内,该灵敏度值高于所有报道的湿度传感器。此外,湿度传感器还具有响应快(15s)、滞后小、重复性好等特点。
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引用次数: 1
Wearable muscle training and monitoring device 可穿戴式肌肉训练和监测装置
Pub Date : 1900-01-01 DOI: 10.1109/MEMSYS.2018.8346480
Y. Takei, M. Yoshida, T. Takeshita, Takeshi Kobayashi
We developed a wearable device that can electrically stimulate muscle and measure the muscle activities simultaneously. This device is composed only of flexible material such as textile electrode printed on cloth and 5μm-thick piezoresistive silicon, polyimide substrate and PDMS. By deploying this device on sportswear, muscle training and motion assist by electric muscle stimulation become possible, monitoring muscle activity simultaneously.
我们开发了一种可穿戴设备,它可以电刺激肌肉,同时测量肌肉活动。该器件仅由印在布上的纺织电极、5μm厚的压阻硅、聚酰亚胺衬底和PDMS等柔性材料组成。通过将该设备安装在运动服上,肌肉训练和运动辅助的电肌肉刺激成为可能,同时监测肌肉活动。
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引用次数: 5
Magnetic-free radio frequency circulator based on spatiotemporal commutation of MEMS resonators 基于MEMS谐振器时空换流的无磁射频环行器
Pub Date : 1900-01-01 DOI: 10.1109/MEMSYS.2018.8346507
Yao Yu, Giuseppe Michetti, Ahmed Kord, D. Sounas, Flavius V. Pop, P. Kulik, Michele Pirro, Z. Qian, A. Alú, M. Rinaldi
This paper reports on the first demonstration of a magnetic-free radio-frequency (RF) Microelectromechanical Resonant Circulator (MIRC). For the first time, magnetic-free non-reciprocity is achieved by imparting an effective angular momentum bias to a MEMS resonant circuit. The angular momentum is efficiently realized through spatiotemporal modulation of three strongly coupled high-Q (>1000) Aluminum Nitride (AlN) Contour Mode MEMS Resonators (CMRs) with signals of the same magnitude and phase difference of 1200. Differently from previous demonstrations based on varactor-based frequency modulation of low-Q LC networks, in this work the spatiotemporal modulation of the high-Q MEMS resonators is implemented by means of switched capacitors which minimizes the complexity of the modulation network, increases the modulation efficiency and mitigates the fundamental linearity limitations associated with solid-state varactors. Furthermore, due to the high Q of the MEMS resonators employed, strong non-reciprocity is achieved with an ultra-low modulation frequency of ∼120 kHz (∼0.08% of the RF frequency, orders of magnitude lower than previous demonstrations) which directly enables a total power consumption of only ∼38 μW which, to the best of our knowledge, is the lowest ever reported for magnetic-free RF circulators based on temporally modulated circuits.
本文报道了一种无磁射频(RF)微机电谐振环行器(MIRC)的首次演示。首次通过向MEMS谐振电路施加有效的角动量偏置来实现无磁非互易性。角动量是通过三个强耦合的高q (bbb1000)氮化铝(AlN)轮廓模MEMS谐振器(CMRs)的时空调制来有效实现的,这些谐振器的信号大小相同,相位差为1200。与以往基于变容器的低q LC网络频率调制的演示不同,在这项工作中,高q MEMS谐振器的时空调制是通过开关电容实现的,从而最大限度地降低了调制网络的复杂性,提高了调制效率,并减轻了与固态变容器相关的基本线性限制。此外,由于所采用的MEMS谐振器的高Q值,强非互易性以~ 120khz的超低调制频率(~ 0.08%的RF频率,比以前的演示低几个数量级)实现,直接使总功耗仅为~ 38 μW,据我们所知,这是有史以来基于时间调制电路的无磁RF循环器的最低报道。
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引用次数: 39
Automated flow-based/digital microfluidic platform integrated with onsite electroporation process for multiplex genetic engineering applications 自动化流动/数字微流控平台集成现场电穿孔过程,用于多种基因工程应用
Pub Date : 1900-01-01 DOI: 10.1109/MEMSYS.2018.8346785
K. Iwai, David Ando, Peter W. Kim, Phillip C. Gach, M. Raje, Todd A. Duncomb, Joshua V. Heinemann, T. Northen, H. Martín, N. Hillson, P. Adams, A. Singh
We present a novel automated flow-based/digital microfluidic platform integrated with onsite electroporation function. In addition to high-throughput arraying of microdroplets and mixing of DNA parts and cells, proposed platform is capable of multiplexed electroporation process and dual optical detection of expressed fluorescence on chip. Unlike conventional microtiter plate based reactions, our platform would allow completely automated and robust genetic engineering steps using drastically smaller amounts of reagents and can be useful for gene editing processes such as CRISPR/Cas9 for synthetic biology applications.
我们提出了一种新型的自动化流动/数字微流控平台,集成了现场电穿孔功能。除了微滴的高通量排列和DNA部分与细胞的混合外,该平台还能够进行多路电穿孔处理和芯片上表达荧光的双光学检测。与传统的基于微量滴度板的反应不同,我们的平台将允许完全自动化和强大的基因工程步骤,使用更少的试剂,可用于基因编辑过程,如用于合成生物学应用的CRISPR/Cas9。
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引用次数: 5
期刊
2018 IEEE Micro Electro Mechanical Systems (MEMS)
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