Papers – Page 32 – TechConnect Briefs

Spacific Flow Control Systems Using IR Laser Induced Sol-Gel Transfer of Hydrogel

Tanaka J., Shirasaki Y., Tatsuoka M., Funatsu T., Watabe S., Shoji S., Edura T., Mizuno J., Wada Y., Waseda University, JP

High efficient IR laser induced sol-gel transfer of hydrogel is applied for the microfluidic systems. High performance biomolecules sorting systems using T-shaped microchannel including IR absorbers were realized. By using Mebiol GelTM as the carrier, [...]

SOI Processing of a Ring Electrokinetic Chaotic Micromixer

Zhang Y.T., Chen H., Mezic I., Meinhart C.D., Petzold L., MacDonald N.C., university of california, santa barbara, US

Micromixing has been an active research area in the past decade due to the rapid expanding application of the lab-on-a-chip system in life science. Using the silicon bulk micromachining technology, a ring electroosmotic micromixer, which [...]

Flow Simulation of a Microfluidic Analog of the Four-Roll Mill

Phelan_Jr. F.R., Hudson S.D., NIST, US

The fluid dynamics of geometries for liquid state materials characterization in microfluidic devices are investigated. A pressure driven device using microchannels is sought that has an adjustable flow type, approximating the function of the four-roll [...]

Electrokinetic Instability Mechanism of Double-layered Miscible Fluids with Different Electrolyte Concentrations in DC Electric Field

Park J.W., Kang K.H., Huh K.Y., Pohang University of Science and Technology, KR

Interfacial instability has recently been observed for DC-powered electroosmotic flow by Chen and Santiago [1]. So far, no plausible explanation has yet been made since the phenomenon is contrary to common belief of laminar flow [...]

Polymeric Micropump with SU-8 Check Valves Assembled by Lamination Technique

Truong T-Q, Nguyen N-T., Nanyang Technological University, SG

This paper presents the first micropumps assembled using polymeric lamination technology. Each pump consists of two 100-m-thick, 10-mm-diameter SU-8 discs; two 1.5-mm-thick, 15-mm-diameter polymethylmethacrylate (PMMA) discs; and one piezo disc. The SU-8 parts were fabricated [...]

Analysis of Blood Extraction from a Lancet Puncture

Kuriger R.J., Romanowicz B.F., CFD Research Corporation, US

A computational model was created utilizing the CFD-ACE+ software to model blood flow from a lancet puncture of the skin. A two-dimensional axisymmetric model was developed and the skin tissue was modeled as a porous [...]

In-Plane Micropump: Design Optimization

Sin J., Lee W.H., Stephanou H.E., RPI, US

This paper presents the fabrication, analysis and optimization of a novel monolithically fabricated diaphragm micropump, referred to as an in-plane micropump. Compared to previous technology, the micropump in this paper is fabricated to have all [...]

Clogging Pressures of Bubbles in Microchannel Contractions: Theory and Experiments

Jensen M.J., Wang X., Attinger D., Bruus H., Mikroelektronik Centret, DTU, DK

We present a theoretical, numerical, and experimental study of bubbles passing through a microchannel contraction. A certain pressure, the so-called clogging pressure, is needed to push a bubble through a microchannel contraction. We present the [...]

Capillary Passive Valve in Microfluidic System

Cho H., Kim H-Y, Kim T.S., Kang J.Y., Kim H-Y, Kim T.S., Microsystem Research Center, Korea Institute of Science and Technology, KR

This work reports the theoretical and experimental investigations of capillary bust valves to regulate liquid flow in microchannels. The theoretical analysis uses the Young-Laplace equation and geometrical considerations to predict the pressure at the edge [...]

Liquid Disintegration: Investigation of Physics by Simulation

Zeng J., Korsmeyer T., Coventor, Inc., US

Liquid disintegration includes the processes of formation of droplets and droplet fission. It is important in inkjet printing and in the miniaturization of biochemical analytical devices. This paper reports on an investigation of the mechanism [...]