Papers – Page 40 – TechConnect Briefs

Optimal Shape Design of Pressure-Driven Curved Micro Channels with Hydrophilic and Hydrophobic Walls

Lim S., Choi H., Seoul National University, KR

In microfluidic applications such as LOC, 90-deg. and 180-deg. curved channels are frequently used to supply long flow passage in a compact volume. In most curved channels, the part connecting two straight channels is made [...]

A Miniature Laser Interferometer for Noninvasive Viscometry

Behroozi F., The University of Northern Iowa, US

A miniature laser interferometer consisting entirely of an optical fiber held in close proximity to a fluid surface is described. The total path difference in this interferometer is less than a millimeter. The interferometer may [...]

Analytical Analysis of a Squeeze Film Dominated MEMS Fluid Ejector

Furlani E.P., Lebens J.A., Eastman Kodak Company, US

We present an analytical model for predicting the behavior of a squeeze film dominated MEMS fluid ejector. The device consists of a piston that moves parallel to an orifice plate, with a thin film of [...]

Ion Channel Based Biosensors: Ionic transport in carbon nanotubes

Joseph S., Mashl R.J., Jacobsson E., Aluru N.R., Beckman Institute of Advanced Science and Technology, US

Transport of molecules through macromolecular pores is of considerable importance in many biological and nano-electromechanical systems. Ion channels found in cell membranes are crucial for shaping electrical signals and controlling flow of ions and fluids [...]

Study of Sample Dispersion Mechanisms in an Electroosmotically Pumped Microchannel

Debusschere B., Najm H., Matta A., Knio O., Ghanem R., Le Maitre O., Sandia National Laboratories, US

In many microfluidic separation processes, dispersion of sample peaks is a significant problem limiting the detection resolution. In this work, we use simulations to study the dominant dispersion mechanisms during a protein labeling process in [...]

Water Ordering by Confinement in Carbon Nanotubes at 300K: Implications for possible design of proton-conducting nano-semiconductors

Mashl R.J., Joseph S., Aluru N.R., Jakobsson E., University of Illinois, US

Molecular dynamics (MD) simulations suggest that water readily enters carbon nanotubes. This is also suggested by the fact that fluorescence in nanotubes is affected by the pH of external electrolyte. Distinctive symmetrical water structures emerge [...]

On the Validity of the No-Slip Condition in Nanofluidics

Koumoutsakos P., Jaffe R.l., Werder T., Walther J.H., Swiss Federal Institute of Technology Zürich, CH

In a collaboration with experimental groups at NASA and ETH Zürich we conduct computational studies towards the development of biosensors in aqueous environments. Examples include arrays of carbon nanotubes that may operate as artificial stereocillia [...]

Month: February 2003