Dual-Gate Fet-Based Charge Sensor Enhanced by In-Situ Electrode Decoration in a MEMS Organs-On-Chip Platform

Conference paper (2021)

Authors

H. Aydogmus Electronic Components, Technology and Materials -

H.J. van Ginkel Electronic Components, Technology and Materials -

Anna-Danai Galiti Student

Michel H.Y. Hu Leiden University Medical Center

Jean Philippe Frimat Leiden University Medical Center

Arn M.J.M. van den Maagdenberg Leiden University Medical Center

Kouchi Zhang Electronic Components, Technology and Materials -

Massimo Mastrangeli Electronic Components, Technology and Materials -

Pasqualina M Sarro Electronic Components, Technology and Materials -

Research Group

Electronic Components, Technology and Materials () (TU Delft)

DOI: https://doi.org/10.1109/Transducers50396.2021.9495393

Organ-on-chip Charge sensing Microfabrication Spark ablation Electrodes Neurons Biosensor

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Published Date

2021

Language

English

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Microelectronics

Research Group

Electronic Components, Technology and Materials

Abstract

Continuous monitoring of tissue microphysiology is a key enabling feature of the organ-on-chip (OoC) approach for drug screening and disease modeling. Sensing charged species in OoC tissue microenvironments is thereby essential. However, the inherently small (i.e., cm) size of OoC devices poses the challenging requirement to integrate miniaturized and highly sensitive in situ charge sensing components to maximize signal extraction from small volumes (nL to L, range) of media used in these devices. Here we meet this need by presenting a novel dual-gate field-effect transistor-based charge sensor integrated within an optically transparent microelectromechanical (MEM) OoC device. Post-process mask-less decoration of Ti sensing electrodes by spark-ablated Au nanoparticle films significantly increases the effective electrode surface area and thus sensor sensitivity while retaining the CMOS-compatibility of the wafer-level fabrication process. We validate the biocompatibility of the sensor and its selective response to poly-D-lsine and KC1, and provide a perspective on monitoring cultures and differentiation of hiPSC-derived cortical neurons on our OoC device.

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- Embargo expired in 06-02-2022