MICROFLOW CONTROL IN MICROFLUIDIC CHIP
CHANNELS BY REGULATED THERMAL FIELDS
A. L. Bulyanitsa
Institute for Analytical Instrumentation RAS, Saint-Petersburg
The paper presents a method for microflow
control in microchannels of a chip for electrophoretic separation of the
sample, based on controlled thermal fields. Contributions from various phenomena
(thermal effect of electric fields, convection, heat conduction, etc.) to
the substance heating in a channel are analyzed. Possible re-alizations of
this method of control - from the simplest one, thermal stabilization, to
introduction of a tracking system with the feedback by emergence detection
of different components - are discussed. The proposed control method is compared
with conventional ones such as channel geometry selection, using a microreactor
with product detection, channel surface modification, etc.