MICRODROPLET INTERFEROMETRY FOR LOCAL PRESSURE MONITORING IN MICROFLUIDIC CHIPS

This paper presents a sensitive microdroplet interferometry to monitor the local pressure in microfluidic chips. Its work principle is based on the shift of fringes to detect the small variation of a droplet profile under different environmental pressures. An accuracy of 0.01% has been obtained. Compared with other methods, this method features high accuracy, simple design, inexpensive fabrication and little effect on microfluidic system, making it promising for many applications