%0 Conference Paper
%A Kireev, Dmitry
%A Schnitker, Jan
%A Seyock, Silke
%A Maybeck, Vanessa
%A Wolfrum, Bernhard
%A Offenhäusser, Andreas
%T Large array of GFETs for extracellular communication with neuronal cells
%M FZJ-2016-02676
%D 2014
%X Graphene has already shown its high ability for biosensing. Solution-gated graphene field effect transistors, which showed very high sensitivity in electrolytes [1], have another biologically important application: recording neuronal activity. Such devices exhibit very high signal-to-noise ratio for extracellular measurements [2].  The aim of this work is to optimize and scale both fabrication procedure and measurement system. When working with biological samples, there is a need in a large number of devices. High density of the devices is also preferable. Therefore we fabricate the devices on 4’’ wafer, resulting in 50 chips, 11*11mm each. Each chip consequently embodies an array of 32 graphene FETs (see fig.1). The active area of the chip is around 2 mm2 while each GFET’s channel differs between 5 and 20 um with altered configurations. Such devices, when used with the already developed multichannel measurements system make possible simultaneous measurement and stimulation of all 32 transistors in a time-scale. This makes possible to measure not just discrete spikes, but even propagation of the action potential through the neuronal network.
%B Graphene Week 2014
%C 23 Jun 2014 - 27 Jun 2014, Gothenburg (Sweden)
Y2 23 Jun 2014 - 27 Jun 2014
M2 Gothenburg, Sweden
%F PUB:(DE-HGF)24
%9 Poster
%U https://juser.fz-juelich.de/record/809749