ABSTRACT This paper proposes a new valveless pump using a PZT diaphragm to create a gas jet flow for fluidic applications. The pump was designed and simulated based on transient fluidic analysis with experimental result of PZT diaphragm so that the features of micropump are reliably predicted. The experimental results of a PMMA prototype confirmed the performance of the pump. The fabrication pr...

a classical theory is developed which calculates the momentum transfer rate constant between an ion and a non-polar molecule. the model takes into consideration the effect of diffraction outside the capture limit on the rate constants. the theory is used to calculate momentum transfer rate constant for cl- with trans-dichloroethylene and para-difluorobenzene. theoretical results are compared to...

Based on the optical deflection method, the resonant characteristics of a microcantilever under various pressure have been observed at room temperature to understand the pressure-dependent dissipation effect. Especially, the quality factor of the cantilever has been measured for up to fourth harmonic mode of cantilever resonance as a function of pressure between 0.1 and 1000 Torr. By considerin...

This work presents patterning of thick (10–50 μm) hybrid polymer structures of ORMOCER by laser direct writing. ORMOCER combine polymer-like fabrication processes with glass-like surface chemistry that is beneficial for many bio-microfluidic applications. ORMOCER is liquid before exposure, so patterning is done by contact-free lithography, such as proximity exposure. With laser direct writing, ...

The paper describes a concept of innovative assistive motion therapy devices with new patent pending fluidic actuators. The main novelty of these soft actuators is the rotary fluid motor with elastic chambers (REC), which produces rotational motion without any additional transmission elements. The key actuator features as inherent compliance, high back-driveability and light-weight design build...

The dynamics of flow-induced translocation of polymers through a fluidic channel has been studied by dissipative particle dynamics (DPD) approach. Unlike implicit solvent models, the many-body energetic and hydrodynamic interactions are preserved naturally by incorporating explicit solvent particles in this approach. The no-slip wall boundary and the adaptive boundary conditions have been imple...

Utilizing a simple fluidic structure, we demonstrate the improved performance of oxidase-based enzymatic biosensors. Electrolysis of water is utilized to generate bubbles to manipulate the oxygen microenvironment close to the biosensor in a fluidic channel. For the proper enzyme reactions to occur, a simple mechanical procedure of manipulating bubbles was developed to maximize the oxygen level ...

An innovative vacuum capillary pneumatic actuation concept that can be used for point-of-care testing has been investigated. The vacuum glass capillaries are encapsulated within a laminated pouch and incorporated into the fluidic card. Vacuum glass capillaries broken by external force such as finger pressure, generate the pneumatic forces to induce liquid flow in the fluidic system. The sizes o...

The present work establishes the optimized spatial arrangement for an array of aligned microcantilever sensors placed inside a fluidic cell. The results of the present investigation show that the optimum spacing distance between the microcantilevers decreases as the fluidic cell height decreases. An increase in the flow Reynolds number is found to increase the optimum spacing distance. However,...

We report a method for making ultra-thin PDMS membrane devices. Freely suspended membranes as thin as 70 nm have been fabricated. Bulging tests were performed with a custom built fluidic cell to characterize large circular membranes. The fluidic cell allows the media (such as air or water) to wet one side of the membrane while maintaining the other side dry. Pressure was applied to the membrane...