TY  - GEN
UR  - https://archiv.ub.uni-heidelberg.de/volltextserver/32280/
A1  - Heimfarth, Daniel
CY  - Heidelberg
Y1  - 2022///
TI  - Electrolyte-Gated Transistors with Polymer-Wrapped Carbon Nanotube Networks for Bioelectronics and Brain-Inspired Computing
AV  - public
ID  - heidok32280
N2  - Networks of polymersorted
semiconducting single-walled carbon nanotubes (SWNTs) exhibit ideal properties for
electrolyte-gated transistors, such as high charge carrier mobilities and a porous morphology.
In combination with many electrolytes, such as ionic liquids, the porosity enables volumetric
charge accumulation in these networks, comparable to ion-permeable polymers in electrochemical
transistors (ECTs). However, the performance of polymer-wrapped SWNTs in
water-gated transistors, which are an important component of bioelectronics, is limited by
the hydrophobicity of commonly used wrapping-polymers. This limitation is overcome within
this thesis by exchanging the hydrophobic wrapping-polymer with an equivalent polymer that
features hydrophilic oligoethylene glycol side chains. High performance water-gated transistors
with large volumetric capacitances are demonstrated, employing aerosol-jet printed
hydrophilic polymer/SWNT hybrids. Furthermore, slow ionc motion in ion-gel-gated dense
SWNT networks is studied and implemented as an approach to create artificial synapses,
which show promising behavior for the development of neuromorphic devices. The properties
of the presented prototypes suggest that future device generations should contain a
mixed network of semiconducting and metallic SWNTs as the gating material and avoid all
parasitic capacitances by passivation in order to obtain non-volatile device operation. These
findings expand the applicability of solution processed SWNT networks for bioelectronics
and brain-inspired computing.
ER  -