scholarly journals LAB-ON-A-CHIP WITH FLUID ACOUSTIC MICROAGITATION - Piezoelectric Polymer β-PVDF used as Ultrassonic Transducer

2008 ◽  
Keyword(s):  
Lab On A Chip ◽  
Piezoelectric Polymer

Ultrasonic Transducer Based on β-PVDF for Fluidic Microagitation in a Lab-on-a-Chip Device

2008 ◽  
Vol 57 ◽  
pp. 99-104 ◽  
Author(s):  
Vanessa F. Cardoso ◽  
P. Martins ◽  
Jivago Serrado-Nunes ◽  
L. Rebouta ◽  
José Gerardo Rocha ◽  
...  
Keyword(s):  
Reaction Rate ◽  
Biological Fluids ◽  
Ultrasonic Transducer ◽  
Lab On A Chip ◽  
Reaction Chamber ◽  
Electronic Control ◽  
Fully Integrated ◽  
Piezoelectric Polymer ◽  
Transmittance Curve ◽  
Transparent Conductive Electrodes

This paper describes a fully-integrated lab-on-a-chip device for testing and monitoring biochemical parameters in biological fluids. The major innovation of this microdevice is the application of an acoustic microagitation technique with automatic electronic control based on a β-PVDF piezoelectric polymer placed underneath the microfluidic structures. Experimental results regarding the influence of the thickness of the polymer on the reaction rate of biological fluids are presented. Moreover, the study of the transmittance curve of β-PVDF with transparent conductive electrodes is also presented. Transparent electrodes are a constraint once the polymer is incorporate underneath the reaction chamber due to the analytical measurement by spectrophotometry.

Hot-Embossed Piezoelectric Polymer Micro-Diaphragm Arrays Integrated with Lab-on-a-Chip for Protein Analysis

2007 ◽  
Author(s):  
Chunyan Li ◽  
Pei-Ming Wu ◽  
Andrew Browne ◽  
Soohyun Lee ◽  
Chong H. Ahn
Keyword(s):  
Lab On A Chip ◽  
Protein Analysis ◽  
Piezoelectric Polymer

All inkjet-printed piezoelectric polymer actuators: Characterization and applications for micropumps in lab-on-a-chip systems

2013 ◽  
Vol 14 (12) ◽  
pp. 3423-3429 ◽  
Author(s):  
Oliver Pabst ◽  
Jolke Perelaer ◽  
Erik Beckert ◽  
Ulrich S. Schubert ◽  
Ramona Eberhardt ◽  
...  
Keyword(s):  
Lab On A Chip ◽  
Polymer Actuators ◽  
Piezoelectric Polymer

Modeling of Contact Patch in Dual-Chamber Pneumatic Tires

2018 ◽  
Vol 46 (2) ◽  
pp. 78-92 ◽  
Author(s):  
A. I. Kubba ◽  
G. J. Hall ◽  
S. Varghese ◽  
O. A. Olatunbosun ◽  
C. J. Anthony
Keyword(s):  
Strain Sensors ◽  
Surface Strain ◽  
Wireless Data ◽  
Data Logger ◽  
Dual Chamber ◽  
Piezoelectric Polymer ◽  
Pure Rolling ◽  
Piezoelectric Elements ◽  
Strain Data ◽  
Deformation Patterns

ABSTRACT This study presents an investigation of the inner tire surface strain measurement by using piezoelectric polymer transducers adhered on the inner liner of the tire, acting as strain sensors in both conventional and dual-chamber tires. The piezoelectric elements generate electrical charges when strain is applied. The inner liner tire strain can be found from the generated charge. A wireless data logger was employed to measure and transmit the measured signals from the piezoelectric elements to a PC to store and display the readout signals in real time. The strain data can be used as a monitoring system to recognize tire-loading conditions (e.g., traction, braking, and cornering) in smart tire technology. Finite element simulations, using ABAQUS, were employed to estimate tire deformation patterns in both conventional and dual-chamber tires for pure rolling and steady-state cornering conditions for different inflation pressures to simulate on-road and off-road riding tire performances and to compare with the experimental results obtained from both the piezoelectric transducers and tire test rig.

scholarly journals Droplet Merging on a Lab-on-a-Chip Platform by Uniform Magnetic Fields

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
V. B. Varma ◽  
A. Ray ◽  
Z. M. Wang ◽  
Z. P. Wang ◽  
R. V. Ramanujan
Keyword(s):  
Magnetic Fields ◽  
Lab On A Chip ◽  
Droplet Merging

scholarly journals Microfluidic Network Simulations Enable On-Demand Prediction of Control Parameters for Operating Lab-On-A-Chip-Devices

Processes ◽  
2021 ◽  
Vol 9 (8) ◽  
pp. 1320
Author(s):  
Julia Sophie Böke ◽  
Daniel Kraus ◽  
Thomas Henkel
Keyword(s):  
Fluid Management ◽  
Lab On A Chip ◽  
Microfluidic System ◽  
Flow Rates ◽  
Demand Prediction ◽  
Fast Running ◽  
Microfluidic Network ◽  
Fluid Properties ◽  
Network Simulations ◽  
User Friendly

Reliable operation of lab-on-a-chip systems depends on user-friendly, precise, and predictable fluid management tailored to particular sub-tasks of the microfluidic process protocol and their required sample fluids. Pressure-driven flow control, where the sample fluids are delivered to the chip from pressurized feed vessels, simplifies the fluid management even for multiple fluids. The achieved flow rates depend on the pressure settings, fluid properties, and pressure-throughput characteristics of the complete microfluidic system composed of the chip and the interconnecting tubing. The prediction of the required pressure settings for achieving given flow rates simplifies the control tasks and enables opportunities for automation. In our work, we utilize a fast-running, Kirchhoff-based microfluidic network simulation that solves the complete microfluidic system for in-line prediction of the required pressure settings within less than 200 ms. The appropriateness of and benefits from this approach are demonstrated as exemplary for creating multi-component laminar co-flow and the creation of droplets with variable composition. Image-based methods were combined with chemometric approaches for the readout and correlation of the created multi-component flow patterns with the predictions obtained from the solver.

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