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A Versatile Bonding Method for PDMS and SU-8 and Its Application towards a Multifunctional Microfluidic Device

Zhen Zhu, Pan Chen, Kegang Liu, Carlos Escobedo
2016 Micromachines  
This hybrid system was used for the effective trapping of microparticles on-chip, and the selective releasing and identification of predefined trapped microparticles.  ...  The hybrid fabrication approach presented here, based on the PDMS-SU-8 bonding, enables multifunctional integration in complex microfluidic devices.  ...  Acknowledgments: We thank Neng Wan for the help of tensile test.  ... 
doi:10.3390/mi7120230 pmid:30404401 pmcid:PMC6190230 fatcat:cm57dvlcgnejfa4yzcwwgotgoa

Instrumented Microphysiological Systems for Real-time Measurement and Manipulation of Cellular Electrochemical Processes

Jonathan R. Soucy, Adam J. Bindas, Abigail N. Koppes, Ryan A. Koppes
2019 iScience  
Specifically, the functionalization of conductive materials with ligand-binding aptamers has permitted the utilization of traditional electronic materials for bioelectronic sensing.  ...  In this review, we provide an overview of the sensing techniques that are relevant to MPS development and highlight the different organ systems to integrate instrumentation for measurement and manipulation  ...  Koppes acknowledge the support from the National Institutes of Health (NIH, R21EB025395-01) and the Department of Chemical Engineering, College of Engineering at Northeastern University.  ... 
doi:10.1016/j.isci.2019.10.052 pmid:31715497 pmcid:PMC6849363 fatcat:2364w5qo3bb3tay574rhytmi2u

Flexible and printed microwave plasmonic sensor for noninvasive measurement

Li Hui Dai, Hong Zhou Zhao, Xia Zhao, Yong Jin Zhou
2020 IEEE Access  
The calculated figure of merit is as high as 1178. The sensor can find wider applications in the flexible and wearable device field for continuous health monitoring.  ...  The printed electrodes for detecting direct current signal changes of human vital signs have been fully investigated.  ...  The FOM of the sensor reaches up to 1178. More works can be conducted for the practical applications of wearable and flexible microwave sensors for measuring subtle changes of blood glucose.  ... 
doi:10.1109/access.2020.3020268 fatcat:v4o4hacsgjdutptfmz4c5s3d54

A surface functionalized nanoporous titania integrated microfluidic biochip

Md. Azahar Ali, Saurabh Srivastava, Kunal Mondal, Pandurang M. Chavhan, Ved V. Agrawal, Renu John, Ashutosh Sharma, Bansi D. Malhotra
2014 Nanoscale  
assembly for detection of total cholesterol.  ...  We present a novel and efficient nanoporous microfluidic biochip consisting of a functionalized chitosan/anatase titanium dioxide nanoparticles electrode integrated in a polydimethylsiloxane (PDMS) microchannel  ...  Acknowledgements The authors thank Director CSIR-NPL, New Delhi, India for the facilities. We thank Mr Sandeep, AFM Lab, CSIR-NPL, New Delhi for the AFM analysis. Md  ... 
doi:10.1039/c4nr03791j pmid:25316118 fatcat:o3oi6hfyuzgnhlg546n3oa2t2a

Recent advances in skin-like wearable sensors: sensor design, health monitoring, and intelligent auxiliary

Ziyu Huang, Yaqi Xu, Ya Cheng, Min Xue, Mengtian Deng, Nicole Jaffrezic-Renault, Zhenzhong Guo
2022 Sensors & Diagnostics  
Recent advances in health monitoring devices and intelligent assistive devices based on skin sensors.  ...  conductive fluid to the skin in contact with the electrode and increasing the contact area and pressure between the electrode and the skin.  ...  To improve the rate of gestural identification, the investigators also designed electrical models of electrode skin contact impedance, which contributed to an improved rate of gestural identification.  ... 
doi:10.1039/d2sd00037g fatcat:awtc4w6zd5efpgvvwifperylru

Wearable sensors: modalities, challenges, and prospects

J. Heikenfeld, A. Jajack, J. Rogers, P. Gutruf, L. Tian, T. Pan, R. Li, M. Khine, J. Kim, J. Wang, J. Kim
2018 Lab on a Chip  
Non-invasive wearable sensing technology extracts mechanical, electrical, optical, and chemical information from the human body.  ...  Joseph Wang is supported by the Defense Threat Reduction Agency Joint Science and Technology Office for Chemical and Biological Defense (HDTRA 1-16-1-0013) and the UCSD Center for Wearable Sensors (CWS  ...  Acknowledgements The authors at the Univ. of Cincinnati acknowledge support from the National Science Foundation and the industrial members of the Center for Advanced Design and Manufacturing of Integrated  ... 
doi:10.1039/c7lc00914c pmid:29182185 fatcat:ziog2wd2lzb2bdcezewvdrwzra

Utilisation of layered piezoelectric resonators for the online measurement of mass density and viscosity of fluids

S. Radel, E. Benes
2009 e & i Elektrotechnik und Informationstechnik  
In both cases sensor versions are available for low sample volumes of 250 ml and 130 ml, respectively.  ...  In this paper layered resonant piezoelectric sensors for liquids are investigated and it is shown that they are advantageous because of their high resolution and accuracy and especially because of the  ...  GRD1-2001-41816, by Anton Paar GmbH, Graz, Austria, and by the Austrian Industrial Research Promotion Fund (FFF), project No. QVD 6=721.  ... 
doi:10.1007/s00502-009-0613-6 fatcat:etkbkdkspzgdfh5rrhlvf5pn44

Classification and Applications of Humidity Sensors: A Review

Anuradha Yadav
2018 International Journal for Research in Applied Science and Engineering Technology  
It explains role of humidity in human life and need of humidity. It also deals with the experimental techniques for the development of humidity sensors and the water adsorption mechanism.  ...  This review introduces an overview of importance of humidity, methods of their measurement. It gives Detailed description of humidity sensors; their types and properties have been discussed.  ...  on dry- and wet-bulb temperature measurements No requirement of calibration Requirement of regular replacement of wick and distilled water, Requirement of air-flow with high flow rate (3 m/  ... 
doi:10.22214/ijraset.2018.4616 fatcat:ep6l3y34ljcw5awzhgsmfr2wse

Chemical Sensors and Measurement [chapter]

Ping Wang, Qingjun Liu
2011 Advanced Topics in Science and Technology in China  
With the rapid development of microelectronics and microprocessing technology, chemical sensors have grown to be more and more miniaturized and integrated.  ...  Meanwhile, microfluidic chips enable continuous monitoring of chemical substances in living organisms. P. Wang et al., Biomedical Sensors and Measurement  ...  and random flow of the fluid during reaction and storage, the uniformity of mixing and the avoiding of bubble formation; The calculation of reagent and production volumes, the compatibility, reliability  ... 
doi:10.1007/978-3-642-19525-9_4 fatcat:4deb75zjsrgt5cxlsarlrczns4

Design and engineering of high‐performance triboelectric nanogenerator for ubiquitous unattended devices

Hongmei Yang, Feng Ru Fan, Yi Xi, Wenzhuo Wu
2021 EcoMat  
Despite the recent advances in the design and development of various triboelectric devices, these devices' output still falls short in meeting the practical needs of directly powering electronics and sensors  ...  The ubiquitous applications of the TENGs in micro/high‐voltage power source, multifunctional intelligence, blue energy harvesting, and self‐powered electrochemical system are also discussed.  ...  Zhou et al 235 demonstrated a fluid energy harvester based on an arc-shaped TENG for harvesting the wind and water flow energy.  ... 
doi:10.1002/eom2.12093 doaj:cc475013e8ab4015ae817f5781aa01cf fatcat:igw5mnz3bje2nevstor5ee7kt4

Fabrication of x-ray absorption gratings via micro-casting for grating-based phase contrast imaging

Yaohu Lei, Yang Du, Ji Li, Zhigang Zhao, Xin Liu, Jinchuan Guo, Hanben Niu
2013 Journal of Micromechanics and Microengineering  
The piezoelectrically excited modal force is calculated directly and provides insight into design optimization for switching speed.  ...  The multiple degree of freedom analytical model, based on modal decomposition, utilizes modal parameters obtained from finite element analysis and an analytical model of piezoelectric actuation.  ...  For an input power of 3.32 W, a maximum of 300 Pa pressure and 1.8 µl min −1 flow rate was observed.  ... 
doi:10.1088/0960-1317/24/1/015007 fatcat:t3acvadwcrhsfcsxtxmefzyhda

Triboelectric Nanogenerators and Hybridized Systems for Enabling Next-Generation IoT Applications

Qiongfeng Shi, Zhongda Sun, Zixuan Zhang, Chengkuo Lee
2021 Research  
utilization rate of multisource energies.  ...  The recent progress of TENG-based hybrid generators and hybridized systems for the outdoor, indoor, wearable, and implantable applications is also provided.  ...  for Health ("Intelligent Monitoring System Based on Smart Wearable Sensors and Artificial Technology for the Treatment of Adolescent Idiopathic Scoliosis," R-263-501-017-133).  ... 
doi:10.34133/2021/6849171 pmid:33728410 pmcid:PMC7937188 fatcat:ddllksz73vaoldm4cxxlqgue5e

Electrical Resistivity and Electrical Impedance Measurement in Mortar and Concrete Elements: A Systematic Review

Gloria Cosoli, Alessandra Mobili, Francesca Tittarelli, Gian Marco Revel, Paolo Chiariotti
2020 Applied Sciences  
This paper aims at analyzing the state-of-the-art techniques to measure electrical impedance (and, consequently, electrical resistivity) of mortar/concrete elements.  ...  changes whenever phenomena modifying the conductivity of mortar/concrete (e.g., degradation or attacks by external agents) occur, this review aims to serve as a guide for those interested in this type  ...  spacing of 38 mm) and measure the voltage drop to calculate the impedance of the specimen.  ... 
doi:10.3390/app10249152 fatcat:u635putttzgp5p6ue33qtd2que

2019 Index IEEE Transactions on Instrumentation and Measurement Vol. 68

2019 IEEE Transactions on Instrumentation and Measurement  
., +, TIM Oct. 2019 3699-3711 Optical fiber polarization Distributed Measurement of Polarization Characteristics for a Multifunctional Integrated Optical Chip: A Review.  ...  QCM-Micropillar-Based Coupled Resonators in the Detection of Gas Mass Flow Rates.  ...  Image scanners Nonlinear Reconstruction of Multilayer Media in Scanning Microwave Microscopy. Wei, Z., +, TIM Jan. 2019 197-205  ... 
doi:10.1109/tim.2019.2956662 fatcat:kotlu7gwcngrdkelerc5va2hqe

Self-powered Sensors and Systems Based on Nanogenerators

Zhiyi Wu, Tinghai Cheng, Zhong Lin Wang
2020 Sensors  
Sensor networks are essential for the development of the Internet of Things and the smart city. A general sensor, especially a mobile sensor, has to be driven by a power unit.  ...  Based on the piezoelectric nanogenerator (PENG) and triboelectric nanogenerator (TENG), extensive studies have focused on self-powered sensors.  ...  Thanks to many group members in Professor Wang's group for their contributions in developing the PENG and TENG technologies.  ... 
doi:10.3390/s20102925 pmid:32455713 pmcid:PMC7288337 fatcat:nwkmypfznrdpraxtwntj354t5i
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