Thomas Lederer, Stefan Clara, Bernhard Jakoby, Wolfgang Hilber,
"Material Selection for Impedance Spectroscopy on an Eletrowetting Based Lab-on-a-Chip"
: Proceedings of the 21th Micromechanics and Micro systems Europe workshop, Seite(n) 40-43, 10-2010
Original Titel:
Material Selection for Impedance Spectroscopy on an Eletrowetting Based Lab-on-a-Chip
Sprache des Titels:
Englisch
Original Buchtitel:
Proceedings of the 21th Micromechanics and Micro systems Europe workshop
Original Kurzfassung:
In this paper we discuss the question
if and under which conditions a lab-on-a-chip platform
can be realized utilizing electrowetting on
dielectrics as an actuation principle and impedance
spectroscopy as a sensor principle. In order to
examine the different isolation layers used for electro
wetting, we measured the impedance function over a
range from 40Hz to 110 MHz. As a result we found
an impedance signal with characteristic properties
measured through thin isolation layers with high
capacitance. With increasing thickness and additional
layers the impedance signal got dominated by the
lower capacitance. Thus, materials with higher
permittivity and hydrophobic layers consisting of
self assembled monolayers are suggested.