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Elevating Platinum to Volumetric Capacitance: High Surface Area Electrodes through Reactive Pt Sputtering.
Gryszel, Maciej; Jakesová, Marie; Vu, Xuan Thang; Ingebrandt, Sven; Glowacki, Eric Daniel.
Afiliación
  • Gryszel M; Laboratory of Organic Electronics, Department of Science and Technology, Linköping University, Bredgatan 33, Norrköping, 60174, Sweden.
  • Jakesová M; Bioelectronics Materials and Devices Laboratory, Central European Institute of Technology, Brno University of Technology, Purkynova 123, Brno, 61200, Czech Republic.
  • Vu XT; Institute of Materials in Electrical Engineering 1, RWTH Aachen University, 52074, Aachen, Germany.
  • Ingebrandt S; Institute of Materials in Electrical Engineering 1, RWTH Aachen University, 52074, Aachen, Germany.
  • Glowacki ED; Bioelectronics Materials and Devices Laboratory, Central European Institute of Technology, Brno University of Technology, Purkynova 123, Brno, 61200, Czech Republic.
Adv Healthc Mater ; : e2302400, 2024 May 17.
Article en En | MEDLINE | ID: mdl-38758352
ABSTRACT
Platinum is the most widespread electrode material used for implantable biomedical and neuroelectronic devices, motivating exploring ways to improve its performance and understand its fundamental properties. Using reactive magnetron sputtering, PtOx is prepared, which upon partial reduction yields a porous thin-film form of platinum with favorable properties, notably record-low impedance values outcompeting other reports for platinum-based electrodes. It is established that its high electrochemical capacitance scales with thickness, in the way of volumetric capacitor materials like IrOx and poly(3,4-ethylenedioxythiophene), PEDOT. Unlike these two well-known analogs, however, it is found that PtOx capacitance is not caused by reversible pseudofaradaic reactions but rather due to high surface area. In contrast to IrOx, PtOx is not a reversible valence-change oxide, but rather a porous form of platinum. The findings show that this oxygen-containing form of Pt can place Pt electrodes on a level competitive with IrOx and PEDOT. Due to its relatively low cost and ease of preparation, PtOx can be a good choice for microfabricated bioelectronic devices.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Adv Healthc Mater Año: 2024 Tipo del documento: Article País de afiliación: Suecia Pais de publicación: Alemania
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Adv Healthc Mater Año: 2024 Tipo del documento: Article País de afiliación: Suecia Pais de publicación: Alemania