Biomicrofluidics Video Contest Entrants

Micropillar Arrays for Analysis of Force Patterns in C. elegans Locomotion

nogger77 — Sun, 19 Dec 2010 18:34:55 -0800

Using a compilation of three clips, this video introduces a microdevice capable of constantly measuring the force of nematodes in motion. The system consists of a micropillar-based device made of flexible polydimethylsiloxane (PDMS) and a vision-based algorithm for resolving force from the deflection of the cantilever-like pillars. Clip 1 shows a dual row pillar array for the measurement of nematode sinusoidal movement. Pillar deflections are small in this layout and ongoing work is aimed at allowing one to better match worm size to array spacing by including a nematode sorter.

Biomicrofluidics Video Contest Entrants

Electrokinetic Concentration and Separation of Particles in Microfluidic Reservoirs

xcxuan — Thu, 02 Dec 2010 07:37:54 -0800

This video exhibits the selective concentration and separation of 3 um particles from 1 um particles in the upstream reservoir of a straight microchannel. This size-based particle sorting arises from the negative dielectrophoresis induced at the reservoir-microchannel junction where the size mismatch of the reservoir and microchannel creates strong inherent electric field gradients.

Biomicrofluidics Video Contest Entrants

Electrothermal Flow in Insulator-Based Dielectrophoresis

xcxuan — Thu, 02 Dec 2010 07:13:08 -0800

In this video 600 nm fluorescent particles were used visualize the electroosmotic fluid flow in insulator-based dielectrophoresis devices. The interaction of Joule heating-induced fluid inhomogeneities and electric field causes electrothermal fluid circulations upstream and downstream the microchannel constriction. By varying the DC and AC field components, we observed different flow patterns in the constriction region due to the competition of electroosmotic flow and electrothermal flow.

Biomicrofluidics Video Contest Entrants

Biomicrofluidics Presents Small Matters: a Video Contest

AIPJournals — Tue, 05 Oct 2010 19:16:45 -0700

Biomicrofluidics is pleased to announce a video contest, Small Matters. The contest is to highlight not only the exciting scientific merit of work conducted in the area of microfluidics and nanofluidics, but also the aesthetic and artistic qualities of the science. Winning entries will demonstrate a novel scientific concept in an elegant presentation. All finalists will be published in a special section of Biomicrofluidics (http://bmf.aip.org/) and one grand prize winner will be chosen to receive an iPad.