In this work we integrate Electrolyte-Gated Field-Effect transistors (EGFET) in Lab-on-Printed Circuit Board (Lab-on-PCB) microsystems for the first time, aiming for the implementation of an ultra-high sensitivity biosensing platform that can still be cost-effectively mass-produced. Silver-nanoparticle ink was ink-jet printed on PCB-based gold electrodes and was chlorinated to fabricate stable pseudo-reference electrodes. Graphene ink was drop-casted to create the transistor channel. Preliminary results with single-stranded DNA (ssDNA) immobilized on the graphene surface revealed systematic shift in Vdirac with increasing complementary DNA concentration.
|Publication status||Acceptance date - 1 Jul 2019|
|Event||Miniaturized Systems for Chemistry and Life Sciences 2019 - Congress Center Basel, Basel, Switzerland|
Duration: 27 Oct 2019 → 31 Oct 2019
Conference number: 23rd
|Conference||Miniaturized Systems for Chemistry and Life Sciences 2019|
|Abbreviated title||µTAS 2019|
|Period||27/10/19 → 31/10/19|
- Printed circuit board
- Field-effect transistor
Papamatthaiou, S., Estrela, P., & Moschou, D. (Accepted/In press). PCB-implemented graphene electrolyte-gated field-effect transistors for biosensing applications. Paper presented at Miniaturized Systems for Chemistry and Life Sciences 2019, Basel, Switzerland.