title: Synthesis of an organic conductive porous material using starch aerogels as template for chronic invasive electrodes.
abstract: We report the development of an organic conducting mesoporous material, as coat for invasive electrodes, by a novel methodology based on the use of starch aerogel as template. The poly(3,4-ethylenedioxythiophene) (PEDOT) aerogel was synthesized by polymerization of 3,4-ethylenedioxythiophene within a saturated starch aerogel with iron (III) p-toluenesulfonate (oxidizing agent) and subsequent removal of the polysaccharide template, followed by supercritical CO2 drying. The chemical structure and oxidation state of the resulting material were studied by Raman spectroscopy. The morphology and surface properties of the obtained nanoporous material were investigated by scanning electron microscopy (SEM), micro computed tomography (μCT) and nitrogen adsorption-desorption techniques. The composition and thermal behaviour were evaluated by energy dispersive spectroscopy (EDS) and thermogravimetric analysis (TGA) respectively. A preliminary biocompatibility test verified the non-cytotoxic effects of the PEDOT aerogel. The large surface area and wide pore size distribution of the PEDOT conductive aerogel, along with its electrical properties, enable it to be used as extracellular matrix scaffold for biomedical applications.
authors.affiliation: Institute of Optical and Electronic Materials, Hamburg University of Technology, Hamburg, 21073, Germany. Electronic address: ricardo.starbird@tu-harburg.de.
authors.forename: Ricardo
authors.initials: R
authors.lastname: Starbird
authors.affiliation: Institute of Thermal Separation Processes, Hamburg University of Technology, Hamburg, 21073, Germany.
authors.forename: Carlos A
authors.initials: CA
authors.lastname: García-González
authors.affiliation: Institute of Thermal Separation Processes, Hamburg University of Technology, Hamburg, 21073, Germany.
authors.forename: Irina
authors.initials: I
authors.lastname: Smirnova
authors.affiliation: Institute of Nanoelectronics, Hamburg University of Technology, Hamburg, Germany.
authors.forename: Wolfgang H
authors.initials: WH
authors.lastname: Krautschneider
authors.affiliation: Institute of Optical and Electronic Materials, Hamburg University of Technology, Hamburg, 21073, Germany.
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Bauhofer
mesh_terms: D000818:Animals; D019086:Bridged Bicyclo Compounds, Heterocyclic / Q000138:chemical synthesis / Q000737:chemistry; D002470:Cell Survival / Q000187:drug effects; D004566:Electrodes; D005782:Gels / Q000737:chemistry* / Q000633:toxicity; D051379:Mice; D041681:NIH 3T3 Cells; D058105:Polymerization; D011108:Polymers / Q000138:chemical synthesis / Q000737:chemistry; D016062:Porosity; D013213:Starch / Q000737:chemistry*
chemical_list: D019086:Bridged Bicyclo Compounds, Heterocyclic; D005782:Gels; D011108:Polymers; C121383:poly(3,4-ethylene dioxythiophene); D013213:Starch
keywords: Aerogel; Conductive polymer; Extracellular matrix scaffold; Structuration; Supercritical CO(2) drying