Localized Dielectric Loss Heating in Dielectrophoresis Devices

Microwave Dielectric Heating of Fluids in Microfluidic Devices

Microwave dielectric heating of drops in microfluidic devices.

We present a technique to locally and rapidly heat water drops in microfluidic devices with microwave dielectric heating. Water absorbs microwave power more efficiently than polymers, glass, and oils due to its permanent molecular dipole moment that has large dielectric loss at GHz frequencies. The relevant heat capacity of the system is a single thermally isolated picolitre-scale drop of water...

Joule Heating Effects on Insulator-based Dielectrophoresis

ABSTRACT We present an experimental and numerical study of Joule heating in a polymeric insulator-based dielectrophoresis (iDEP) device. In this study, we used a microscale thermometry technique based upon the temperature-sensitive fluorescence of Rhodamine B dye to monitor the fluid temperature within our iDEP microfluidic devices. We then complemented our experiments with 3D finite element si...

PERFORMANCES OF HIGH-K DIELECTRIC MATERIALS (Al2O3, HfO2, ZrO2) FOR LIQUID DIELECTROPHORESIS (LDEP) MICROFLUIDIC DEVICES

This paper reports performances of improved Liquid Dielectrophoresis (LDEP) devices made of Al2O3, HfO2 or ZrO2 as dielectric layers, rather than using classical dielectric layers (SiN, SU-8 resin, SiO2...). These layers have been evaluated on several parameters, such as the threshold actuation voltage, the resistance to the electric field and the droplet generation process. The High-K material...

Titanium-based dielectrophoresis devices for microfluidic applications.

To date, materials selection in microfluidics has been restricted to conventional micromechanical materials systems such as silicon, glass, and various polymers. Metallic materials offer a number of potential advantages for microfluidic applications, including high fracture toughness, thermal stability, and solvent resistance. However, their exploitation in such applications has been limited. I...