Papers – Page 696 – TechConnect Briefs

Enhancement of micro-flow mixing using DC nonlinear electrokinetic vortices

Chen J.K., Yang R-J, National Cheng Kung University, TW

Electroosmotic flow (EOF) is a fundamental electrokinetic phenomenon which finds extensive use in wide varieties of practical biochip applications and analyses. Generally, the dielectric materials (PDMS, glass, etc.) used to construct microchips have low dielectric [...]

A Microfluidic Mixer for Chaotic Mixing of Magnetic Particles

Zolgharni M., Azimi S.M., Bahmanyar M.R., Balachandran W., Brunel University, UK

Magnetic isolation of specific biological entities through utilizing super-paramagnetic micro-particles has been of great interest in both bench-top and microfluidic platforms. Since the magnetic particles and target entities are suspended in separate fluids, prior to [...]

Lithographic fabricated ultra hydrophobic and porous plant-like surfaces for bio chip applications

Mertsch O., Walter A.D., Loechel B., Schondelmaier D., BESSY GmbH, DE

A novel method for fabricating ultra-hydrophobic surfaces for bio chip and MEMS applications is presented. The base of this method is a lithographic process with some substantial changes of the exposure conditions. Plant-like structures are [...]

Molecular Dynamics Simulations of Nano-Droplet Wetting on a Solid Surface

Sedighi N., Murad S., Aggarwal S.K., University of Illinois at Chicago, US

An initially spherical liquid droplet is located between two moving parallel surfaces (or walls). The shape of the droplet in contact with the solid surfaces is studied by applying continues pressure to the moving walls. [...]

Numerical and Experimental Investigation of Three-Dimensional Hydrodynamic Focusing in Polydimethylsiloxane (PDMS) Microchannels

Chang C-C, Yang R-J, National Cheng Kung University, TW

In this work, we have designed and fabricated a three-dimensional hydrodynamic focusing microfluidic device, as shown in Figure 1. The design of the device is modified from that of a previous study [1], which comprises [...]

Liquid transport detection using single FET devices

Truman P., Uhlmann P., Stamm M., Institute of Polymer Research, DE

Observation and monitoring liquid transport and transport in liquids is a major task for lab on a chip applications and research. We use novel thin film FET devices based on silicon-on-insulator (SOI) substrates as planar [...]

Droplet-based Segregation and Extraction of Concentrated Samples

Buie C.R., Buckley P., Hamilton J., Ness K.D., Rose K.A., Lawrence Livermore National Laboratory, US

Incorporating microfluidic-based technologies into bio-analytical instruments has many benefits including reduced sample consumption, faster response times, and improved sensitivity. To achieve these benefits, microfluidic analysis often requires sample concentration and separation techniques, e.g., isotachophoresis or [...]

Methods of energizing micro flows by acoustic and electric fields

Schönfeld F., Dadic D., Hardt S., Püschl R., Schmitz F., Institut für Mikrotechnik Mainz –(IMM), DE

We present two different concepts for energizing (e.g. mixing, pumping) of micro flows, which rely on the coupling of acoustic and electromagnetic energy into a liquid. Both concepts are analyzed using computational fluid dynamics (CFD) [...]

Multifunctional Microvalves Control by Optical Illumination on Nanoheaters and its Application in Centrifugal Microfluidic Devices

Park J.M., Cho Y-K, Lee B-S, Lee J-G, Lee B-S, Lee J-G, Ko C., Samsung Advanced Institute of Technology, KR

We report ultrafast control of phase-change based microvalves utilizing nanoheaters; ferronanoparticles dispersed in paraffin wax, and heating by optical illumination using a 808 nm laser diode. High speed camera images showed that the actual response [...]

Microfluidic Cell Culture System for Live Cell Imaging

Powell M.J., Higashi L.K., Cabasug A.A., Giffin S.M., Alley R.K., Nanopoint Inc., US

Nanopoint has developed a novel micro-fabricated live cell containment device called cellTRAYTM designed specifically for imaging live cells. The device enables the precise containment of cells in an optical glass substrate, the size of a [...]