Direct heating of droplets for chemical and biological reactions on lab-on-chip devices using high frequency AC voltage

K. N. Nampoothiri, M. S. Seshasayee, V. Srinivasan, M. S. Bobji, P. Sen

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We demonstrate a novel concept to heat a drop. Temperature rise occurs when high frequency (10-50 kHz) AC actuation voltage (270 Vrms-460 Vrms) is applied on the dielectric coated coplanar electrodes. The temperature rise (up to 40 °C) inside the drop provides calibrated high temperatures for enabling chemical reactions on Lab-on a-Chip devices. Droplet spreading along the electrode gap happens as this actuation regime also coincides with dielectrophoresis. The proposed technique does not require separate microheaters on the chip as electrodes designed for droplet actuation can be used to achieve localized heating.

Original languageEnglish (US)
Title of host publication21st International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2017
PublisherChemical and Biological Microsystems Society
Pages1411-1412
Number of pages2
ISBN (Electronic)9780692941836
StatePublished - 2020
Event21st International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2017 - Savannah, United States
Duration: Oct 22 2017Oct 26 2017

Publication series

Name21st International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2017

Conference

Conference21st International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2017
CountryUnited States
CitySavannah
Period10/22/1710/26/17

Bibliographical note

Funding Information:
The authors would like to thank Nonlinear Photonics and High Power Lasers Laboratory, Centre for Nano Science and Engineering for providing us the thermal camera. The authors would also like to thank SERB, Department of Science & Technology for the financial support and National Nanofabrication Centre for the device fabrication.

Keywords

  • Direct heating
  • Electrothermal flows
  • Joule heating
  • Temperature rise

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