Micro & Bio Fluidics, Lab-on-Chip – Page 44

Modeling of Surface Tension in Fluidic MEMS Using the Level-Set Method

Takahashi K., Kyushu University, JP

Mixed state of liquid and gas is frequently seen in fluidic MEMS, for example, ink jet printer, heat exchanger, thermo-capillary optical switch, and so on. The surface tension is the most dominant mechanical effect in [...]

Simulation and Optimization of Tesla Valves

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

Tesla valve is a no-moving-parts valve. It has many advantages over conventional checkvalves in microscale. However, there has been very few literatures discussing its optimization. Systematic construction of the valve’s geometry has not been reported. [...]

Accurate Analytical Models of Fluid Friction in Rectangular Microchannels

Tchikanda S.W., Nilson R.H., Griffiths S.K., Sandia National Laboratories, US

Liquid flow in microchannels is important to a number of technologies including cooling of microelectronics by heat pipes and capillary pumped loops as well as capillary wetting of channels in molding processes and in chip-based [...]

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 [...]

Micro Fluidics

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 [...]