Pneumatic Flow Switching on Centrifugal Microfluidic Platforms In Motion

摘要

ABSTRACT: This paper describes a flow switching technique applicable to centrifugal micro-nfluidic platforms, using a regulated stream of compressed gas. This pneumatic flow switchingntechnique allows for flow control at a T-shaped junction between one inlet channel and twonoutlet channels. This technique provides a noncontact, robust, and efficient method fornswitching the direction of fluid flow while a disk is rotating at relatively low frequencies. Thenswitching operation can be implemented reproducibly with applied gas flow rates between 17nand 58 L min-1nand rotational frequencies between 400 rpm (6.6 Hz) and 1200 rpm (20 Hz).