alexa Nanomaterial-modified Flexible Micro-electrode Array by Electrophoretic Deposition of Carbon Nanotubes | OMICS International | Abstract
ISSN: 2153-0777

Journal of Bioengineering and Bioelectronics
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Review Article

Nanomaterial-modified Flexible Micro-electrode Array by Electrophoretic Deposition of Carbon Nanotubes

Winkin N1*, Gierth U2, Mokwa W1 and Schneider M2

1RWTH Aachen University, Institute of Materials in Electrical Engineering, Sommerfeldstraße, Achen, Germany

2Fraunhofer Institute for Ceramic Technologies and Systems IKTS, Electrochemistry, interbergstraße 28, Dresden, Germany

Corresponding Author:
Winkin N
RWTH Aachen University
Institute of Materials in Electrical Engineering
Sommerfeldstraße 24, 52074 Aachen, Germany
E-mail: [email protected]

Received date: April 21, 2016; Accepted date: May 25, 2016; Published date: June 02, 2016

Citation: Winkin N, Gierth U, Mokwa W, Schneider M (2016) Nanomaterial-modified Flexible Micro-electrode Array by Electrophoretic Deposition of Carbon Nanotubes. Biochip Tissue Chip 6:115. doi:10.4172/2153-0777.1000115

Copyright: © 2016 Winkin N, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Abstract

Micro-electrode arrays (MEAs) and micro-electrodes are used in a variety of medical applications for recording action potentials or stimulating neurons. To have an excellent signal-to-noise ratio, the contact between the neuronal tissue and the micro-electrodes must be very close. Therefore, a flexible MEA with a large number of electrodes on a large area is necessary. In this work, a flexible micro-electrode array (MEA) with an integrated flexible CMOS-chip was designed and fabricated. By connecting several of these MEAs by a bus system, the number of electrodes and therefore the spatial resolution can be increased extremely. Because of the small size of the micro-electrodes (<120 µm) each electrode needs a high charge delivery capacity and a high “true” surface area for stimulation, respectively. This can be obtained by coating the electrodes by disordered multi-walled carbon nanotubes (MWCNTs). Direct current pulsed Electrophoretic Deposition (EPD) has been proved successfully for the aforementioned application. The effective deposition time and the pulse width were figured out to create ideal MWCNT-electrode properties, particularly, with regard to the enhancement of the “true” surface area, microscopic homogeneity and reproducibility of the layer.

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