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Towards Label-free Detection of Charged Macromolecules Using Field-effect-based Structures: Scaling Down from Capacitive EIS Sensor over ISFET to Nano-scale Devices

Published online by Cambridge University Press:  01 February 2011

Michael J. Schoening ,
Maryam H. Abouzar ,
Sven Ingebrandt ,
Johannes Platen ,
Andreas Offenhaeusser  and
Arshak Poghossian
Michael J. Schoening
Affiliation:
[email protected], University of Applied Sciences Aachen & Research Centre Juelich, Laboratory for Chemical Sensors and Biosensors, Ginsterweg 1, 52428 Juelich, Juelich, NRW, 52428, Germany, +49/2461-9932315, +49/2461-993235
Maryam H. Abouzar
Affiliation:
[email protected], Aachen University of Applied Sciences & Research Centre Juelich, Laboratory for Chemical Sensors and Biosensors, Juelich, NRW, 52428, Germany
Sven Ingebrandt
Affiliation:
[email protected], Research Centre Juelich, ISG2, Juelich, NRW, 52425, Germany
Johannes Platen
Affiliation:
[email protected], Aachen University of Applied Sciences & Research Centre Juelich, Laboratory for Chemical Sensors and Biosensors, Juelich, NRW, 52428, Germany
Andreas Offenhaeusser
Affiliation:
[email protected], Research Centre Juelich, ISG2, Juelich, NRW, 52425, Germany
Arshak Poghossian
Affiliation:
[email protected], Aachen University of Applied Sciences & Research Centre Juelich, Laboratory for Chemical Sensors and Biosensors, Juelich, NRW, 52428, Germany
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Abstract

The possibility of a label-free electrical detection of charged macromolecules using semiconductor field-effect sensors offers a new approach for the development of DNA chips with fast and direct electrical readout. A deep understanding of the adsorption and interaction of charged biomolecules onto charged surfaces is of great interest also for the fundamental understanding of many key physiological processes. In the present work, two types of field-effect sensors, namely a capacitive EIS (electrolyte-insulator-semiconductor) structure and an ISFET (ion-sensitive field-effect transistor) have been utilised for monitoring layer-by-layer adsorption of polyelectrolytes as well as for the DNA immobilisation and hybridisation detection.

Keywords

sensornanostructuremicroelectro-mechanical (MEMS)
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 915: Symposium R – Nanostructured Materials and Hybrid Composites for Gas Sensors and Biomedical Applications , 2006 , 0915-R05-04
Copyright
Copyright © Materials Research Society 2006

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