title: Electrolyte-Gated Transistors with Polymer-Wrapped Carbon Nanotube Networks for Bioelectronics and Brain-Inspired Computing
creator: Heimfarth, Daniel
subject: 530
subject: 530 Physics
subject: 540
subject: 540 Chemistry and allied sciences
description: 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.
date: 2022
type: Dissertation
type: info:eu-repo/semantics/doctoralThesis
type: NonPeerReviewed
format: application/pdf
identifier: https://archiv.ub.uni-heidelberg.de/volltextserverhttps://archiv.ub.uni-heidelberg.de/volltextserver/32280/1/Dissertation_Daniel%20Heimfarth.pdf
identifier: DOI:10.11588/heidok.00032280
identifier: urn:nbn:de:bsz:16-heidok-322807
identifier:   Heimfarth, Daniel  (2022) Electrolyte-Gated Transistors with Polymer-Wrapped Carbon Nanotube Networks for Bioelectronics and Brain-Inspired Computing.  [Dissertation]     
relation: https://archiv.ub.uni-heidelberg.de/volltextserver/32280/
rights: info:eu-repo/semantics/openAccess
rights: http://archiv.ub.uni-heidelberg.de/volltextserver/help/license_urhg.html
language: eng