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2022 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)最新文献

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Design and fabrication of a solid-state chemiresistive sensor for the detection of hexavalent chromium 用于检测六价铬的固态化学电阻传感器的设计与制造
Pub Date : 2022-07-10 DOI: 10.1109/fleps53764.2022.9781516
Shweta Shekar, S. Subramanian, Praveen C Ramamurthy
The present work reports the use of a conjugated organic molecule for the detection of hexavalent chromium ions. The organic molecule designed herein is a guanidine-based moiety that has shown a limit of detection as low as 1ppm when used in the form of a chemiresistive sensor.
本工作报道了使用共轭有机分子检测六价铬离子。本文设计的有机分子是基于胍的部分,当以化学电阻传感器的形式使用时,其检测极限低至1ppm。
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引用次数: 0
Impact of Torsion on Flexible Interconnects 扭转对柔性互连的影响
Pub Date : 2022-07-10 DOI: 10.1109/fleps53764.2022.9781517
E. Altinozen, A. Vukovic, P. Sewell
This paper reports on a computational model that is used to assess the reflection loss and transmission of flexible interconnects fabricated on a PI substrate and exposed to torsion deformation. Realistic material parameters that include dielectric and metallic losses typical of interconnects fabricated on the PI substrate are used in the model.
本文报告了一个计算模型,用于评估在PI衬底上制造的挠性互连的反射损失和传输,并暴露于扭转变形。模型中使用了真实的材料参数,包括介电损耗和金属损耗,这些参数是在PI衬底上制造的互连的典型参数。
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引用次数: 0
Directly conductive, flexible, 3D printed, EEG electrodes 直接导电,柔性,3D打印,脑电图电极
Pub Date : 2022-07-10 DOI: 10.1109/fleps53764.2022.9781489
L. Xing, A. Casson
Electroencephalography (EEG) is the non-invasive monitoring of the electrical activity in the brain, and forms a key part of Brain-Computer Interfaces (BCIs). Traditionally EEG instrumentation has been connected to the head using wet Ag/AgCl electrodes in the shape of a (typically) 1 cm disc. However, the conductive gel used increases set up time, and all the electrodes are the same size and shape for all users and head/hair shapes. Recently 3D printed EEG electrodes have been proposed to allow personalised EEG electrodes. However, to-date these have relied on printing a base structure which is then coated in Ag/AgCl. This paper presents 3D printed EEG electrodes using a directly conductive filament. The resulting electrodes do not require a conductive gel or coating, can be personalized, and cost less money and manufacturing time. The new electrodes are characterized in terms of electrical resistance, skin contact impedance and mechanical strength, all showing an acceptable performance. We demonstrate their use for recording Steady-State Visual Evoked Potential (SSVEP) brain responses in comparison to wet and dry Ag/AgCl electrodes.
脑电图(EEG)是对脑电活动的无创监测,是脑机接口(bci)的重要组成部分。传统的EEG仪器使用湿的Ag/AgCl电极连接到头部,其形状通常为1厘米的圆盘。然而,所使用的导电凝胶增加了设置时间,所有电极的尺寸和形状都是相同的,适用于所有用户和头发的形状。最近,3D打印EEG电极被提出用于个性化EEG电极。然而,到目前为止,这些都依赖于打印一个基础结构,然后涂上Ag/AgCl。本文介绍了一种使用直接导电灯丝的3D打印EEG电极。由此产生的电极不需要导电凝胶或涂层,可以个性化,成本更低,制造时间更短。新电极在电阻、皮肤接触阻抗和机械强度方面均表现出可接受的性能。我们展示了它们在记录稳态视觉诱发电位(SSVEP)大脑反应方面的应用,并与干湿Ag/AgCl电极进行了比较。
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引用次数: 3
AI-based Liquid Classification with Laser-Induced Graphene Flex-Sensor 基于人工智能的激光诱导石墨烯柔性传感器液体分类
Pub Date : 2022-07-10 DOI: 10.1109/fleps53764.2022.9781486
Ibrahim Bozyel, Alper Endes, Aybuke Akkoca, Baris Yuksekkaya, Dincer Gokcen
Flexible sensors have a great impact in removing the barriers of the electronic components caused by their rigid shape. This study introduces optimal artificial intelligence algorithms for the classification of high precision flex-sensor outputs in sensing various liquids. The composite-based sensor was realized by combining polydimethylsiloxane (PDMS) and laser-induced graphene formed on polyimide (PI). PI substrate was engraved by blue laser to produce graphene sheets over the surface, while this approach decreases cost of sensor production, reliability of mass production was improved with less process steps. The recorded capacitance values were used to classify various liquids dropped over the sensor, then more than 90% accuracy, precision, and recall results were obtained under the scope of this study.
柔性传感器在消除电子元件因其刚性形状而产生的障碍方面具有重要的作用。本文介绍了用于各种液体传感中高精度柔性传感器输出分类的最佳人工智能算法。该传感器是将聚二甲基硅氧烷(PDMS)与激光诱导形成的聚酰亚胺(PI)上的石墨烯结合而成的。利用蓝色激光在PI衬底上刻制石墨烯片,降低了传感器的生产成本,减少了工艺步骤,提高了批量生产的可靠性。利用记录的电容值对落在传感器上的各种液体进行分类,在本研究范围内获得了90%以上的准确度、精密度和召回率结果。
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引用次数: 0
Metal Patterning via Arc Etching for Thin Film Electronics 薄膜电子学的电弧蚀刻金属图案
Pub Date : 2022-07-10 DOI: 10.1109/FLEPS53764.2022.9781513
Aswathi R. Nair, S. Sambandan
This paper discusses a novel technique for patterning metal thin film for thin film transistor applications. This is a roll to roll compatible patterning technique which involves the formation of an arc discharge between a metal electrode and the metal thin film. The arc discharge results in the etching of metal thin film in a very narrow region. Preliminary studies indicate the formation of etched regions having feature size as small as 30μm at an applied voltage of 100V. Further, a metal-semiconductor-metal structure is fabricated by patterning the metal using both the standard shadow mask method and the proposed arc etching method. A comparison between the current-voltage characteristics in both cases demonstrate the possibility of using arc etching as a source-drain patterning technique suitable for thin film transistors.
本文讨论了一种用于薄膜晶体管的金属薄膜图像化新技术。这是一种卷对卷兼容的图案化技术,涉及在金属电极和金属薄膜之间形成电弧放电。电弧放电导致金属薄膜在很窄的区域内蚀刻。初步研究表明,在施加电压为100V时,可形成特征尺寸小至30μm的蚀刻区域。此外,通过使用标准阴影掩膜方法和所提出的电弧蚀刻方法对金属进行图图化来制造金属-半导体-金属结构。两种情况下的电流-电压特性的比较证明了使用电弧蚀刻作为一种适用于薄膜晶体管的源极-漏极图像化技术的可能性。
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引用次数: 0
Demonstration of near-field capacitive standard communication bus for ultrathin reconfigurable sensor nodes 超薄可重构传感器节点近场电容式标准通信总线的演示
Pub Date : 2022-07-10 DOI: 10.1109/fleps53764.2022.9781573
Mathias Fayolle, Séverine de Mulatier, R. Delattre, S. Blayac
This paper proposes a simple and effective method to wirelessly connect a microcontroller to a sensor using Serial Peripheral Interface (SPI). The transmission is done using capacitive interconnections. A pair of electrodes replaces the ohmic connection between the Integrated Circuits (IC). Our system is suited for prototyping ultrathin electronics and reconfigurable interfaces with sensors. A wireless communication with a packet error rate of 0.4 % between a microcontroller and a TC72 temperature sensor is demonstrated.
本文提出了一种利用串行外设接口(SPI)实现单片机与传感器无线连接的简单有效的方法。传输是通过电容互连完成的。一对电极取代集成电路(IC)之间的欧姆连接。我们的系统适用于超薄电子产品的原型设计和与传感器的可重构接口。介绍了一种微控制器与TC72温度传感器之间的无线通信,误码率为0.4%。
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引用次数: 0
Conducting Polymer based Field-Effect Transistor for Volatile Organic Compound Sensing 用于挥发性有机化合物传感的导电聚合物场效应晶体管
Pub Date : 2022-07-10 DOI: 10.1109/fleps53764.2022.9781501
A. Panchal, Ankit Malik, Bidisha Nath, Praveen C Ramamurthy
This work presents the sensing ability demonstrated by thiophene derivative in an OFET architecture. The detection ability of the fabricated device was tested in real-time for acetone at various intervals manifesting as variation in drain currents. 1x1 cm2 90 nm thermal oxide substrate were used for lithographically patterning of interdigitated source-drain structures with a channel length of 40um. A reduction in drain current by ~35% and charge carrier mobility by ~ 53% was observed attributed to the sensing action performed by thiophene derivative film by acetone vapor interaction. The photoluminescence spectra corroborate the specific interaction of acetone molecules with sensing element.
这项工作提出了传感能力证明了噻吩衍生物在一个OFET架构。以漏极电流的变化为表现,实时测试了该装置对丙酮的检测能力。采用1x1 cm2的90 nm热氧化物衬底对沟道长度为40um的交叉源-漏结构进行光刻图像化。噻吩衍生物薄膜通过丙酮蒸气相互作用的传感作用,使漏极电流降低了35%,载流子迁移率降低了53%。光致发光光谱证实了丙酮分子与传感元件的特异性相互作用。
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引用次数: 1
Large-area bio-electronic sensors for early detection of pancreatic-biliary cancer protein markers 大面积生物电子传感器用于早期检测胰胆癌蛋白标志物
Pub Date : 2022-07-10 DOI: 10.1109/fleps53764.2022.9781550
L. Sarcina, F. Viola, Francesco Modena, P. Bollella, M. Caironi, I. Esposito, L. Torsi, F. Torricelli, E. Macchia
Pancreatic-biliary cancer represents a challenge for clinicians since the detection is performed at later stages and treated with palliative approaches. A screening method for the early detection should be of paramount importance. The aim of this study is the detection of pancreatic mucinous cysts protein markers (MUC1) in human serum down to the physical limit, using an Electrolyte-gated FET based technology, namely the "Single-Molecule assay with a large Transistor" (SiMoT) platform. The structure and transistor components have been developed on plastic substrates. The 3D gate structure is compatible with an ELISA plate. The functionalization procedure is assessed independently through Surface Plasmon Resonance, enabling the real-time monitoring of the gold modification with antibodies essential for the assay.
胰胆管癌对临床医生来说是一个挑战,因为检测是在晚期进行的,并采用姑息治疗方法。早期发现的筛查方法应该是至关重要的。本研究的目的是使用基于电解质门控场效应管的技术,即“大晶体管单分子测定”(SiMoT)平台,检测人血清中胰腺粘液囊肿蛋白标记物(MUC1)至物理极限。在塑料衬底上开发了结构和晶体管元件。三维栅极结构与ELISA板兼容。功能化过程通过表面等离子体共振进行独立评估,从而能够实时监测检测所需抗体对金修饰的影响。
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引用次数: 1
Flexible ferroelectret for zero power wearable application 零功率可穿戴应用的柔性铁驻极体
Pub Date : 2022-07-10 DOI: 10.1109/fleps53764.2022.9781488
Pedro González-Losada, Hao Yang, Rui M. R. Pinto, Mohammadmahdi Faraji, Rosana A. Dias, K. Vinayakumar
The advancement in Internet of Things (IoT) and 5G technologies are pushing the interest in zero power sensor networks in different sectors including wearables, wellbeing, smart packaging, and agriculture. In this manuscript, we report the adhesive-bonded piezoroelectret for the application in zero-power sensors. Laser-patterned polyvinyl chloride (PVC) adhesive tape is used to bond two 25 µm-thick FEP sheets with chargetrapping voids. The bonded fluorinated ethylene propylene (FEP) sheets were charged using a 1) pyroelectric and 2) corona discharging approach to produce piezoroelectrets. Produced piezoroelectrets were characterized for the force response and piezoelectric coefficient (d33 = 20-30 pC/N) using an in-house built setup. Further, the repeatability between different piezoroelectret samples fabricated using a similar approach is validated. Produced flexible piezoelectret was used to measure the human cardiac pulse pressure in the wrist.
物联网(IoT)和5G技术的进步正在推动人们对可穿戴设备、健康、智能包装和农业等不同领域的零功耗传感器网络的兴趣。在这篇文章中,我们报道了在零功率传感器中应用的胶粘剂粘合的压电驻极体。使用激光图板聚氯乙烯(PVC)胶带将两片25 μ m厚的FEP片与电荷捕获空洞粘合在一起。采用1)热释电和2)电晕放电的方法对键合的氟化乙丙烯(FEP)片进行了充电,产生了压电驻极体。利用自制装置对所制压电驻极体的力响应和压电系数(d33 = 20-30 pC/N)进行了表征。此外,使用类似方法制备的不同压电驻极体样品之间的重复性得到了验证。利用自制的柔性压电体测量人体腕部脉搏压。
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引用次数: 3
Flexible Microplasma Discharge Device for Treating Burn Wound Injuries Against Fungal Infections 柔性微等离子体放电装置治疗烧伤抗真菌感染
Pub Date : 2022-07-10 DOI: 10.1109/fleps53764.2022.9781581
Parinaz Eskandari, C. L. Beaver, S. Rossbach, D. Maddipatla, M. Atashbar
A flexible microplasma discharge device (MDD) was fabricated for the eradication of Candida albicans, an opportunistic pathogenic yeast, using ambient air as the sterilization agent. To fabricate the MDD, silver ink was deposited on flexible polyethylene terephthalate (PET) films in a honeycomb and circular design using screen-printing process to fabricate the top and bottom electrodes. Then the MDD was assembled by attaching the top and bottom electrode using a two-sided Kapton tape (dielectric layer). The antifungal efficacy of the MDD was investigated by varying parameters including treatment time (60, 90 and 120 seconds) and applied voltage (6, 8 and 10 V). The antifungal efficacies of 12.5% and 100% were achieved for applied voltage ranging from 6 V to 10 V for a treatment time of 60 seconds respectively. Similarly, as the treatment time increased from 60 seconds to 120 seconds for an applied voltage of 6 V, an efficacy rate of 3% to 95% was obtained, respectively. In addition, a surface temperature of 22.4 °C was measured at an applied voltage of 6 V which is safe to the wound area. This clearly demonstrated that the MDD can eliminate the C. albicans with an efficacy rate of 95% at a low voltage of 6 V and treatment time of 120 seconds.
制备了一种以环境空气为灭菌剂的柔性微等离子体放电装置(MDD),用于杀灭条件致病菌白色念珠菌。为了制造MDD,银墨水沉积在柔性聚对苯二甲酸乙二醇酯(PET)薄膜上,采用蜂窝和圆形设计,采用丝网印刷工艺制造顶部和底部电极。然后用双面卡普顿胶带(介电层)连接上下电极组装MDD。通过不同处理时间(60、90和120秒)和施加电压(6、8和10 V)对MDD的抑菌效果进行了研究。施加电压为6 ~ 10 V,处理时间为60秒时,MDD的抑菌效果分别为12.5%和100%。同样,当施加电压为6 V时,治疗时间从60秒增加到120秒,有效率分别为3%至95%。此外,在对伤口区域安全的6 V施加电压下,测量了22.4°C的表面温度。这清楚地表明MDD在6 V的低电压和120秒的治疗时间下可消除白色念珠菌,有效率达95%。
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引用次数: 3
期刊
2022 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)
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