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Issue 6, 2011
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Nanocavity electrode array for recording from electrogenic cells

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We present a new nanocavity device for highly localized on-chip recordings of action potentials from individual cells in a network. Microelectrode recordings have become the method of choice for recording extracellular action potentials from high density cultures or slices. Nevertheless, interfacing individual cells of a network with high resolution still remains challenging due to an insufficient coupling of the signal to small electrodes, exhibiting diameters below 10 µm. We show that this problem can be overcome by a new type of sensor that features an electrode, which is accessed via a small aperture and a nanosized cavity. Thus, the properties of large electrodes are combined with a high local resolution and a good seal resistance at the interface. Fabrication of the device can be performed with state-of-the-art clean room technology and sacrificial layer etching allowing integration of the devices into sensor arrays. We demonstrate the capability of such an array by recording the propagation of action potentials in a network of cardiomyocyte-like cells.

Graphical abstract: Nanocavity electrode array for recording from electrogenic cells

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Publication details

The article was received on 10 Nov 2010, accepted on 10 Jan 2011 and first published on 01 Feb 2011

Article type: Paper
DOI: 10.1039/C0LC00582G
Lab Chip, 2011,11, 1054-1058

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    Nanocavity electrode array for recording from electrogenic cells

    B. Hofmann, E. Kätelhön, M. Schottdorf, A. Offenhäusser and B. Wolfrum, Lab Chip, 2011, 11, 1054
    DOI: 10.1039/C0LC00582G

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