Abstract
We report on the deposition of planar lipid bilayers (supported membranes) on gallium nitride (GaN) electrodes for potential applications as membrane-based biosensors. The kinetics of the lipid membrane formation upon vesicle fusion were monitored by simultaneous measurements of resistance and capacitance of the membrane using AC impedance spectroscopy in the frequency range between 50mHz and 50kHz. We could identify a two-step process of membrane spreading and self-healing. Despite its relatively low resistance, the membrane can be modeled by a parallel combination of an ideal resistor and capacitor, indicating that the membrane efficiently blocks the diffusion of ions.
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Schubert, T., Steinhoff, G., von Ribbeck, H.G. et al. Gallium nitride electrodes for membrane-based electrochemical biosensors. Eur. Phys. J. E 30, 233–238 (2009). https://doi.org/10.1140/epje/i2009-10511-x
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DOI: https://doi.org/10.1140/epje/i2009-10511-x