Heating characteristics of water droplets encapsulated by oil droplets on a piezoelectric substrate

ABSTRACT

A method for obtaining temperature characteristics of a water droplet encapsulated by a paraffin oil droplet was presented. An interdigital transducer with 27.5 MHz center frequency was fabricated on a 128^° YX-LiNbO₃ substrate using microelectric technology. A micro temperature sensor was coated by poly (dimethylsilicone) (PDMS) film to improve the adhesiveness to the water droplet, and then fixed by a PDMS block. Purified water droplets encapsulated by paraffin oil droplets were demonstrated. Results show that their temperature cure fell in between that of the pure droplet and that of the pure paraffin oil droplet at the same power of electric signal.

KEYWORDS:

• Surface acoustic wave
• droplet
• interdigital transducer
• radiation
• heating characteristics

Funding

This work was partly supported by the Research fund of Changzhou Institute of Technology and Innovation fund under award Number YN1404 and 201511055039X. This work was also partly supported by Changzhou Sci&Tech Program, Grant No. CE20155054.