TY  - CONF
AU  - Kireev, Dmitry
AU  - Schnitker, Jan
AU  - Seyock, Silke
AU  - Maybeck, Vanessa
AU  - Wolfrum, Bernhard
AU  - Offenhäusser, Andreas
TI  - Large array of GFETs for extracellular communication with neuronal cells
M1  - FZJ-2016-02676
PY  - 2014
AB  - 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.
T2  - Graphene Week 2014
CY  - 23 Jun 2014 - 27 Jun 2014, Gothenburg (Sweden)
Y2  - 23 Jun 2014 - 27 Jun 2014
M2  - Gothenburg, Sweden
LB  - PUB:(DE-HGF)24
UR  - https://juser.fz-juelich.de/record/809749
ER  -