"Microwave dielectric heating of drops in microfluidic devices"
David Issadore, Katherine J. Humphry, Keith A. Brown, Lori Sandberg, David A. Weitz, and Robert M. Westervelt
Lab on a Chip Online advance article (2009)
Soft Matter Keywords
microfluidic, emulsion, dielectric heating
Figure 1. (a) Schematic of the microfluidic microwave heating system. (b) Microfluidic drop maker. Water drops in fluorocarbon oil are being produced. (c) Parallel drop splitters reduce drops to 63% of their original diameter. (d) Section of microfluidic channel between heating electrodes. The white circles are drops flowing in oil between the two dark metallic electrodes. (e) Image of the actual device as set up on the fluorescence microscope.
Figure 2. (a) Long time fluorescence exposure overlaid onto bright field image of the heating region. A decrease in fluorescence signal from the cadmium selenide nanocrystals indicates an increase in temperature. (b) Line average of the normalized fluorescence intensity versus horizontal position. (c) Change in drop temperature versus time, calculated from (b) and a calibration curve.
Practical Application of Research
Dielectric Heating of Water Drops On-Chip
written by Donald Aubrecht