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Seed IRG 2 Highlights

Flow-Enhanced Vesicle Deformation in the Four-roll Mill

Susan Muller, Dept. Chemical Engineering, UC Berkeley
This project leverages ongoing research on the dynamics of DNA and vescicles within CPIMA.  We have developed a novel microfluidic four-roll mill that allows all flow types (from extension to shear to rotation) to be accessed and have previously used it to examine DNA tumbling in mixed flows and, […]

Microfluidic Device for DNA Dynamics in Mixed Flows

DNA tumbling in mixed flows that vary from shear to rotation.Lab-on-a-chip devices that are capable of performing microanalytical testing must have the capacity to precisely control the flow of very small volumes of fluid. The typical approach to this involves microfluidic devices in which the flow channels are of the order of 50 to 100 microns in diameter. Of particular interest in CPIMA has been the use of microfluidic devices that could be used to create flow conditions for capturing and orienting biomolecules that are sufficiently long that they may be visualized with optical microscopy. The prime model system for such experiments has been double-stranded DNA, which could achieve lengths of the order of tens of microns. In recent work, Muller and Shaqfeh have developed microfluidic devices and sequence-specific probes for studies of DNA hybridization kinetics that may also allow DNA genotyping with unprecedented read lengths.