capillarity – TechConnect Briefs

Capillary flow of whole blood in microsystems: non-Newtonian blood behavior and substrate reagent-coating effect

Berthier J., Cosnier M.L., Cubizolles M., Gosselin D., Huet M., Pouteau P., Sabatte G., CEA-Leti (University Grenoble Alpes), FR

Introduction: The use of whole blood is a preferred solution for portable diagnostic and monitoring systems. We analyze here two particularities of microsystems for blood analysis: the blood non-Newtonian behavior, and the capillary flow in [...]

Open-Surface Microfluidics

Berthier J., Brakke K.A., Delapierre G., Furlani E.P., Karampelas I.H., CEA-LETI, FR

The developments of open-surface microfluidics (OSM) for biotechnology are recent, and motivated by the development of point-of-care (POC) and home-care systems. The advantages of capillary systems are (1) low cost due to easy and fast [...]

Capillary filling speed in silicon dioxide nano-channels

Bruus H., Jarlgaard S.E., Kristensen A., Mikkelsen M.B.L., Skafte-Pedersen P., Technical University of Denmark, DK

We present a simple silicon-based fabrication technique for nanocapillaries based on controlled growth of silicon-dioxide, UV lithography, etching with etch-stop, and glass wafer bonding. Our approach improves state-of-the-art with respect to the obtained cross-wafer homogeneity [...]

Capillary Interaction Between a Small Thin Solid Plate and a Liquid

Saif T., Taher M., University of Illinois Urbana-Champaign, US

Micromechanical systems are increasingly being used in micro fluidic and biological applications where solid-liquid interaction phenomena become important. Here, we present an analytical/computational study on the interaction force between a thin solid plate interfacing with [...]

Simulation of (Self-) Priming in Capillary Systems Using Lumped Models

Löhr M., Mellmann J., Sandmaier H., Sesterhenn M., Stierle B., Strobelt T., University of Stuttgart, DE

In this paper, a toolbox of lumped models for simulating (self-)priming and emptying of complex capillary networks is presented. Each model is a kind of an all-in-one-model, that considers inertia, friction, gravitation and capillarity and [...]