Advanced Materials & Manufacturing – Page 272

High efficiency E. coli concentration via dynamic light-induced optoelectro-osmosis flow

Yang S.M., National Chiao Tung University, TW

We demonstrate a dynamic light-induced optoelectroosmosis flow design for E. coli concentration on an organic photoconductive material based biochip. Several traditional approaches of purification and enrichment for bacteria are to use magnetic beads coated with [...]

Hot spots active-cooling micro-channel heat sink device, using electro-osmotic flow

Al-Rjoub M.F., Roy A.K., Ganguli S., Banerjee R.K., University of Cincinnati, US

In this pilot study a micro-scale heat exchanger/ spreader was designed and tested. This device is dedicated for the thermal management of microchip hot spots. The basic design consisted of an array of microchannels etched [...]

Red Blood Cell Deformation in Flows through a PDMS Hyperbolic Microchannel

Yaginuma T., Oliveira M.S.N., Lima R., Ishikawa T., Yamaguchi T., FEUP - Faculdade de Engenharia da Universidade do Porto, PT

Red blood cells (RBCs) are the major cellular component in blood and are highly deformable in their normal state. RBC deformability is important in the delivery of oxygen to the tissues and plays a major [...]

Synthesis of fine Pharmaceutical Particles by a Gaseous Antisolvent Mechanism

Bakhbakhi Y., Alfadul S.M., chafidz A., Ajbar A., King Saud University, SA

Nonconventional processing techniques can lead to the development of materials with unique chemical, physical or mechanical characteristics that make them suitable for specialized applications. One such technique is synthesizing with supercritical fluids, where the unique [...]

High Deborah number flows through 3D contractions at the microscale

Oliveira M.S.N., Afonso A.M., Pinho F.T., Alves M.A., FEUP - Faculdade de Engenharia da Universidade do Porto, PT

In this work, we report a rich sequence of elastic transitions captured experimentally using a solution of polyethylene oxide in a water/glycerol mixture that exhibits shear-thinning and viscoelastic behavior. The experiments were carried out in [...]

Superhydrophobic porous silicon surfaces

Bolognesi G., University of Roma “La Sapienza”, IT

In this paper, we present a novel inexpensive technique to produce superhydrophobic surfaces from porous silicon. Superhydrophobic surfaces are a key technology for their ability to reduce friction losses in microchannels and their self cleaning [...]

Experimentally-validated theory for the effective zeta potential in microchannel with gate electrodes

Bonotto F., Lenzi A., Viola F., Napoli M., Frey J., Pennathur S., university of california, santa barbara, US

In this work we develop an approach to solve for the effective zeta potential in a channel with nonuniform zeta potentials, such as metal gate electrodes in the channel network for flow control applications. Specifically, [...]

Accommodation coefficient investigation in rectangular micro-channels for large Knudsen number range

Hadj Nacer M., Graur I., Perrier P., Université de Provence, FR

Experimental and numerical investigations on the flow through rectangular microchannel are presented. The constant volume technique was used to measure the mass flow rate through rectangular microchannel which had gold deposits on the interior surfaces. [...]

An Experimental Determination of Temperature-Dependent Thermal Conductivity of Cyclohexane-Based Nanofluids

Fan L., Khodadadi J.M., Auburn University, US

In extending their applicability , utilization of nanofluids as superior solid-liquid phase change materials (PCM) for thermal energy storage has been proposed recently. This extension of potential utility of nanofluids will require thermal conductivity measurements [...]

Thermal Conductivity and Viscosity Measurements of Water-Based Silica Nanofluids

Bobbo S., Colla L., Scattolini M., Agresti F., Barison S., Pagura C., Fedele L., CNR-Consiglio Nazionale delle Ricerche, IT

Nanofluids are a new class of fluids that could significantly improve the thermal properties of fluids used as thermal vectors. They are obtained by dispersing in common fluids (water, glycol, oil) solid nanoparticles (diameter <100 [...]