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2016 IEEE 11th Annual International Conference on Nano/Micro Engineered and Molecular Systems (NEMS)最新文献

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Well-aligned ZnO nanorods grown directly on GaN substrates for optoelectronic applications 直接在GaN衬底上生长的排列良好的ZnO纳米棒用于光电应用
R. Yatskiv, J. Grym
We report on the hydrothermal growth of ZnO nanorods directly on GaN templates with a different density of dislocations. The influence of the quality of the GaN substrate on morphological and optical properties of ZnO nanorods is presented. The morphology of the ZnO nanorods was investigated by scanning electron microscopy while the optical properties were studied by low temperature photoluminescence spectroscopy. To control the position and size of the ZnO nanorods, the GaN templates were patterned by e-beam lithography.
我们报道了ZnO纳米棒直接在不同位错密度的GaN模板上水热生长。研究了GaN衬底质量对ZnO纳米棒形貌和光学性能的影响。用扫描电镜研究了ZnO纳米棒的形貌,并用低温光致发光光谱研究了ZnO纳米棒的光学性质。为了控制ZnO纳米棒的位置和尺寸,采用电子束光刻技术对GaN模板进行了图像化处理。
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引用次数: 0
Theoretical, numerical and experimental study of residual stress effect on two microresonators for acoustic sensing 声学传感用两微谐振器残余应力效应的理论、数值和实验研究
Weiguan Zhang, Wenshu Sui, Yi-Kuen Lee
Residual stress during the micro-fabrication process has been one of the main issues in many MEMS/NEMS sensors and actuators, especially acoustic sensing. We conduct theoretical, numerical and experimental study on the residual stress effect on the frequency responses of two types of polysilicon micro circular resonators: clamped and residual stress (RS) free design which can release the process-induced stress and is of easy fabrication. The measured natural frequency of the fabricated device is 39.8 kHz, in good agreement with both theoretical and FEM simulation results. We also determined the natural frequencies of these two designs as a function of residual stress. Under the same experimental RS condition of 50 MPa, the normalized changes of natural frequencies of these two designs are 159.7% versus 0.8%, respectively.
微加工过程中的残余应力一直是许多MEMS/NEMS传感器和执行器,特别是声学传感中的主要问题之一。本文从理论、数值和实验三个方面研究了残余应力对两种多晶硅微圆谐振器频率响应的影响:箝位设计和无残余应力设计。该装置的实测固有频率为39.8 kHz,与理论和有限元仿真结果吻合较好。我们还确定了这两种设计的固有频率作为残余应力的函数。在相同的50 MPa实验条件下,两种设计的固有频率归一化变化分别为159.7%和0.8%。
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引用次数: 0
Silicon MEMS actuator with no space gap between driving electrodes 驱动电极之间无间隙的硅MEMS致动器
T. Nishino, Kazuki Baba, Yuri Nakai, H. Tanigawa, Kenichiro Suzuki
Two kinds of new silicon actuators, cantilever and twisted-beam, based on pn diode actuation principle are presented. The space gap that is absolutely needed in conventional electrostatic MEMS actuators is replaced by a depletion layer in reversely-biased pn diode. The strong electric field generated in the depletion layer forces a silicon microstructure to vibrate. The microstructure causes a large deflection at resonance. This actuator eliminates a narrow gap between driving electrodes. Consequently, the silicon actuators maintain to be of high reliability for a long period.
提出了基于pn二极管驱动原理的悬臂式和扭梁式两种新型硅致动器。传统静电MEMS驱动器中绝对需要的空间间隙被反向偏置pn二极管中的耗尽层所取代。在耗尽层中产生的强电场迫使硅微结构振动。微观结构在共振时产生很大的挠度。这种致动器消除了驱动电极之间的狭窄间隙。因此,硅致动器在很长一段时间内保持高可靠性。
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引用次数: 0
A multiple sensor platform with dedicated CMOS-LSIs for robot applications 一个多传感器平台,专用于机器人应用的cmos - lsi
C. Shao, T. Nakayama, Y. Hata, T. Bartley, Y. Nonomura, Shuji Tanaka, M. Muroyama
In recent years, there has been an increasing interest in robots' tactile sense, which enables safer, more reliable and accurate human-robot communication for the future society. So far, we have developed a capacitive type tactile sensor network system for implementing a large number of sensors with MEMS-CMOS integration technologies [1-3, 9]. Considering practical use for the robot, multiple kind sensors in addition to numerous sensor distributions are necessary in terms of accurate object recognition and wide coverage of sensor requirements such as high-sensitivity, large dynamic range, high-reliability and low-cost. Thus, we proposed a sensor platform with dedicated CMOS-LSIs [6], which can utilize three types of sensors: on-chip temperature, off-chip capacitive and resistive tactile sensors. The CMOS-LSI is well designed for integration with MEMS. This paper describes the first implementation results of the multiple kind sensors with the CMOS-LSIs. We successfully constructed the multi sensor system, which has the temperature sensor, capacitive and resistive type force sensors.
近年来,人们对机器人的触觉越来越感兴趣,它可以为未来社会提供更安全、更可靠、更准确的人机通信。到目前为止,我们已经开发了一种电容式触觉传感器网络系统,用于实现大量具有MEMS-CMOS集成技术的传感器[1- 3,9]。考虑到机器人的实际应用,要实现对物体的准确识别,以及高灵敏度、大动态范围、高可靠性和低成本等传感器覆盖范围广的要求,除了传感器分布众多之外,还需要多种类型的传感器。因此,我们提出了一个专用的cmos - lsi传感器平台[6],它可以利用三种类型的传感器:片上温度传感器,片外电容和电阻触觉传感器。CMOS-LSI是为与MEMS集成而设计的。本文介绍了基于cmos - lsi的多种类传感器的初步实现结果。我们成功构建了包含温度传感器、电容式和电阻式力传感器的多传感器系统。
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引用次数: 3
A nano-gap biosensor using nano-patterned conductive molecule for cTnT detection 一种用于cTnT检测的纳米间隙生物传感器
Hsiao-Ting Hsueh, Po-Han Chen, Chih-Ting Lin
Nanostructure has been envisioned as a novel factor to enhance biomolecular sensing characteristics. In this work, we propose a novel biosensor by using a nano gap formed between two electrodes for biomolecular detections. The nano-gap electrode increases sensitivity of near-surface electrochemical conductances. To examine the proposed sensing characteristics of the nano-gap electrode, different conductive linkers (CB2C and PABA were immobilized to form a conductive layer on the nano-gap surface between the electrodes. The conductance increment of CB2C and PABA linker was about 56% and 396% respectively. This conductance improvement provides nano-gap electrodes ability for cTnT detection, also, the dynamic detection range of CB2C and PABA is from 1ng/ml to 100ng/ml and from 10pg/ml to 100ng/ml respectively. The results also proved that the thickness of conductive layer is a critical factor in conductance and detection limit.
纳米结构已被设想为提高生物分子传感特性的新因素。在这项工作中,我们提出了一种新型的生物传感器,利用两个电极之间形成的纳米间隙进行生物分子检测。纳米间隙电极提高了近表面电化学电导的灵敏度。为了研究纳米间隙电极的传感特性,我们将不同的导电连接剂(CB2C和PABA)固定在电极之间的纳米间隙表面形成导电层。CB2C和PABA连接剂的电导增量分别为56%和396%。这种电导的提高为cTnT的检测提供了纳米间隙电极的能力,同时,CB2C和PABA的动态检测范围分别为1ng/ml ~ 100ng/ml和10pg/ml ~ 100ng/ml。结果还证明了导电层厚度是影响电导和检测限的关键因素。
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引用次数: 0
A study of the incubation of microbead agglutination assays in a microfluidic system 微流体系统中微珠凝集试验的培养研究
D. Castro, D. Conchouso, A. Arevalo, I. Foulds
This work reports on a quantitative study of the incubation of a microbead-based agglutination assay inside a microfluidic system. In this system, a droplet (1.25μL) consisting of a mixture of functionalized microbeads and analyte is flowed through a 0.51mm internal diameter silicone tube. Hydrodynamic forces alone produce a very efficient mixing of the beads within the droplet. We tested the agglutination at different speeds and show a robust response at the higher range of speeds (150 - 200μL/min), while also reaching a completion in the agglutination process. At these velocities, a length of 180cm is shown to be sufficient to confidently measure the agglutination assay, which takes between 2.5 - 3 minutes. This high throughput quantification method has the potential of accelerating the measurements of various types of biomarkers, which can greatly benefit the fields of biology and medicine.
本工作报告了微流体系统中基于微球凝集试验的孵育的定量研究。在该系统中,由功能化微珠和分析物的混合物组成的液滴(1.25μL)流过内径0.51mm的硅胶管。单是流体动力就能使液滴内的珠子非常有效地混合在一起。实验结果表明,在较高的速度范围内(150 ~ 200μL/min)具有较强的反应能力,同时达到了一个完整的凝集过程。在这样的速度下,180cm的长度被证明足以自信地测量凝集试验,这需要2.5 - 3分钟。这种高通量的定量方法具有加速各种生物标记物测量的潜力,可以极大地造福于生物学和医学领域。
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引用次数: 1
Miniaturized electrochemical sensor modified with aptamers for rapid norovirus detection 用适体修饰的小型化电化学传感器用于诺如病毒的快速检测
Nan Wang, M. Kitajima, Kalaivani Mani, E. Kanhere, A. Whittle, M. Triantafyllou, J. Miao
This paper presents a miniaturized MEMS (microelectromechanical systems)-based electrochemical aptasensor, which utilizes aptamer as the recognition element for simple, sensitive and rapid detection of norovirus. The novelty of this work is integration of micro fabrication technology with aptamers to develop a miniaturized and portable electrochemical sensor for environmental pathogen monitoring. The binding capability between aptamers and on-chip sensing electrodes was investigated and the performance of the proposed MEMS electrochemical aptasensor was evaluated with respect to sensor response to different titers of murine norovirus, a model of human norovirus. This research forms initial basis for the development of an electrochemical MEMS-aptasensor platform and its application for virus detection.
本文提出了一种基于微机电系统(MEMS)的微型化电化学适体传感器,该传感器以适体为识别元件,对诺如病毒进行简单、灵敏、快速的检测。本工作的新颖之处在于将微加工技术与适体相结合,开发了一种用于环境病原体监测的小型化、便携式电化学传感器。研究了适配体与片上传感电极的结合能力,并通过传感器对不同滴度的鼠诺如病毒(一种人类诺如病毒模型)的响应来评估所提出的MEMS电化学适配体传感器的性能。本研究为电化学mems -适体传感器平台的开发及其在病毒检测中的应用奠定了初步基础。
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引用次数: 9
Highly sensitive piezoelectric micromachined ultrasonic transducer (pMUT) operated in air 高灵敏度压电微机械超声换能器(pMUT)在空气中工作
Tao Wang, Takeshi Kobayashi, Bin Yang, Hao Wang, Chengkuo Lee
Piezoelectric micromachined ultrasonic transducer (pMUT) gains increasing interests from researchers. It overcomes the inherent shortcomings of conventional bulk ultrasonic transducers such as acoustic impedance mismatching. In addition, pMUT does not require the extremely large input voltage as capacitive micromachined ultrasonic transducer (cMUT), which is potential to be integrated into portable electronics. The lead zirconate titanate (PZT) based pMUT has the best performance. Leveraging on our newly developed pulse poling process, the morphotropic phase boundary composition PZT (MPB-PZT) thin film is of high piezoelectric constant (d31=105pm/V) and low dielectric loss (~0.06). Benefited from such high performance PZT thin film and optimized design, the fabricated pMUT (500×300μm) achieves a displacement sensitivity of 807nm/V at its resonant frequency (482kHz) without DC offset. Compared to previously reported PZT pMUTs, even the dimension is much smaller; the sensitivity is still superior to them. The in-air transmitting performance is evaluated as well. A single pMUT element is able to generate 63.7dB sound pressure level (SPL) at 10 mm in air with only 2V input. The low input voltage not only provides low power consumption, but also prevents the unwanted PZT repolarization. The proposed highly sensitive pMUT shows its promise for integration with portable electronics.
压电微机械超声换能器(pMUT)越来越受到研究人员的关注。它克服了传统本体超声换能器固有的声阻抗不匹配等缺点。此外,pMUT不需要像电容式微机械超声换能器(cMUT)那样的超大输入电压,具有集成到便携式电子设备中的潜力。锆钛酸铅(PZT)基pMUT性能最好。利用我们新开发的脉冲极化工艺,制备出了具有高压电常数(d31=105pm/V)和低介电损耗(~0.06)的相变相边界成分PZT薄膜。得益于这种高性能PZT薄膜和优化设计,制备的pMUT (500×300μm)在谐振频率(482kHz)下实现了807nm/V的位移灵敏度,无直流偏移。与先前报道的PZT pmut相比,即使尺寸也小得多;灵敏度仍然优于它们。并对其空中传输性能进行了评价。单个pMUT元件能够在仅2V输入的情况下在10毫米空气中产生63.7dB声压级(SPL)。低输入电压不仅提供了低功耗,而且还防止了不必要的PZT复极化。所提出的高灵敏度pMUT显示了其与便携式电子设备集成的前景。
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引用次数: 15
A design of TPoS resonator with narrow tether 窄链TPoS谐振器的设计
Xinyi Li, J. Bao, Feihong Bao
A novel kind of RF MEMS lateral extensional thin-film piezoelectric-on-silicon(TPoS) resonator with narrow tethers is proposed. The conventional three-layers supporting beams could be simplified to single material by utilizing different kinds of doping on the bulk structural silicon layer. Within the scope of the fabrication process allowed, the width of tethers could be decreased from 10μm to 2μm, which would greatly reduce the dissipation of the energy from anchors. The finite element analysis simulation results show that the quality factor of the resonator is raised from 13800 to 207300. One feasible way to fabricate this novel resonator is demonstrated. To overcome the disadvantage of power capacity limited by the P-N junction, one associative operating circuit is also introduced.
提出了一种新型的窄系带射频MEMS横向拉伸薄膜压电谐振器。通过在大块结构硅层上掺杂不同的材料,可以将传统的三层支撑梁简化为单一材料。在制造工艺允许的范围内,锚索宽度可从10μm减小到2μm,这将大大减少锚索能量的耗散。有限元分析仿真结果表明,该谐振器的质量因数由13800提高到207300。提出了一种可行的方法来制作这种新型谐振腔。为了克服pn结限制功率容量的缺点,还引入了一种联合工作电路。
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引用次数: 1
Glass reflow process and its applications 玻璃回流工艺及其应用
N. Toan, S. Sangu, T. Ono
This work presents the glass reflow process for microsystems. In this process, glass compounded silicon structures are achieved with the help of vacuum cavities under a high temperature. Three applications employing the glass reflow process, through-wafer interconnects, thermal isolation, and optical window, have been proposed and investigated.
本文介绍了微系统的玻璃回流工艺。在此过程中,借助于真空腔在高温下实现玻璃复合硅结构。提出并研究了玻璃回流工艺的三种应用:通过晶圆互连、热隔离和光窗。
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引用次数: 0
期刊
2016 IEEE 11th Annual International Conference on Nano/Micro Engineered and Molecular Systems (NEMS)
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