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@PHDTHESIS{Shokoohimehr:906358,
author = {Shokoohimehr, Pegah},
title = {{N}anostraw-{N}anocavity {MEA}s as a new tool for long-term
and high sensitive recording of neuronal signals},
volume = {76},
school = {RWTH Aachen University},
type = {Dissertation},
address = {Jülich},
publisher = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
reportid = {FZJ-2022-01387},
isbn = {978-3-95806-593-2},
series = {Schriften des Forschungszentrums Jülich Reihe Information
/ Information},
pages = {xi, 136},
year = {2021},
note = {Dissertation, RWTH Aachen University, 2021},
abstract = {Electrical measurement of neuronal signals has enabled
fundamental discoveries in neuroscience.Patch clamp method
as a key standard of electrophysiological device has been
shown an access tothe interior single cell using an
electrode. Via this method recording of the signals from the
entirespectrum of the membrane potentials, from action
potential down to sub-threshold signals such aspost synaptic
potentials, is feasible. Due to the invasive nature of this
method, long term recordingof the cell is challenging.
Extracellular electrodes, such as microelectrode arrays, in
contrast enablelong term recordings of neuronal networks.
However, these electrodes can only measure a fractionof the
action potentials, which is due to the lack of proper
cell-electrode coupling and high noiseof the electrodes.
Research in the last decade has been focused on overcoming
these limitations.Development of the vertical 3D
nanoelectrodes has allowed to access the cell’s interior,
howeverin most cases after the application of external
forces such as opto/electro-poration, and thereforethese
transient methods are not suitable for long term
recordings.In this thesis, I developed nanostructure
microelectrodes by associating two approaches ofnanostraws
and nanocavities. Using nanostraws facilitate penetration to
the cell membrane, andthe introduction of nanocavities
provide high seal-resistance. The
spontaneouselectrophysiological recording using our
nanoelectrodes demonstrate both extracellular
andintracellular $(20\%$ of cases) action potentials of
cortical rat neurons over long period of time. Thisapproach
enables the continuous high signal to noise ratio recordings
with high sensitivity and theability to record post synaptic
potentials. To further improve the spatial resolution of
neuronalnetwork recordings, our nanoelectrodes can be
integrated to CMOS-devices, which is of greatinterest for
the neurophysiological studies},
cin = {IBI-3},
cid = {I:(DE-Juel1)IBI-3-20200312},
pnm = {899 - ohne Topic (POF4-899)},
pid = {G:(DE-HGF)POF4-899},
typ = {PUB:(DE-HGF)3 / PUB:(DE-HGF)11},
urn = {urn:nbn:de:0001-2022040621},
url = {https://juser.fz-juelich.de/record/906358},
}