Summary: IOP PUBLISHING JOURNAL OF MICROMECHANICS AND MICROENGINEERING
J. Micromech. Microeng. 17 (2007) 609­616 doi:10.1088/0960-1317/17/3/025
Control and ultrasonic actuation of a
gas­liquid interface in a microfluidic chip
Jie Xu and Daniel Attinger
Laboratory for Microscale Transport Phenomena, Department of Mechanical Engineering,
Columbia University, New York, NY 10027, USA
E-mail: da2203@columbia.edu
Received 12 October 2006, in final form 29 December 2006
Published 20 February 2007
Online at stacks.iop.org/JMM/17/609
Abstract
This paper describes the design and manufacturing of a microfluidic chip,
allowing for the actuation of a gas­liquid interface and of the neighboring
fluid. The first way to control the interface motion is to apply a pressure
difference across it. In this case, the efficiency of three different
micro-geometries at anchoring the interface is compared. Also, the critical
pressures needed to move the interface are measured and compared to a
theoretical result. The second way to control the interface motion is by
ultrasonic excitation. When the excitation is weak, the interface exhibits

Source: Attinger, Daniel - Department of Mechanical Engineering, Columbia University

Collections: Engineering