Journal article
On Chip Droplet Characterization: A Practical, High-Sensitivity Measurement of Droplet Impedance in Digital Microfluidics
Abstract
We demonstrate a new approach to impedance measurement on digital microfluidics chips for the purpose of simple, sensitive, and accurate volume and liquid composition measurement. Adding only a single series resistor to existing AC droplet actuation circuits, the platform is simple to implement and has negligible effect on actuation voltage. To accurately measure the complex voltage across the resistor (and hence current through the device and …
Authors
Sadeghi S; Ding H; Shah GJ; Chen S; Keng PY; Kim C-JC; van Dam RM
Journal
Analytical Chemistry, Vol. 84, No. 4, pp. 1915–1923
Publisher
American Chemical Society (ACS)
Publication Date
February 21, 2012
DOI
10.1021/ac202715f
ISSN
0003-2700