Publication detail

Elevating Platinum to Volumetric Capacitance: High Surface Area Electrodes through Reactive Pt Sputtering

GRYSZEL, M. JAKEŠOVÁ, M. VU, X. INGEBRANDT, S. GLOWACKI, E.

Original Title

Elevating Platinum to Volumetric Capacitance: High Surface Area Electrodes through Reactive Pt Sputtering

Type

journal article in Web of Science

Language

English

Original 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. Platinum is used in many medical implants, but lags behind next-generation electrode materials in performance. How sputtered platinum oxide is a microfabricatable thin film material that provides bioelectronics electrodes with volumetric capacitance and low impedance that tweaks platinum to compete at the level of conducting polymers and IrOx is shown. image

Keywords

bioelectronics; biomedical microdevices; electrochemistry; platinum; reactive sputtering

Authors

GRYSZEL, M.; JAKEŠOVÁ, M.; VU, X.; INGEBRANDT, S.; GLOWACKI, E.

Released

17. 5. 2024

Publisher

WILEY

Location

HOBOKEN

ISBN

2192-2640

Periodical

Advanced Healthcare Materials

Year of study

13

Number

5

State

United Kingdom of Great Britain and Northern Ireland

Pages count

7

URL

https://onlinelibrary.wiley.com/doi/10.1002/adhm.202302400

Full text in the Digital Library

http://hdl.handle.net/11012/249528

BibTex

@article{BUT188751,
  author="Maciej {Gryszel} and Marie {Jakešová} and Xuan Thang {Vu} and Sven {Ingebrandt} and Eric Daniel {Glowacki}",
  title="Elevating Platinum to Volumetric Capacitance: High Surface Area Electrodes through Reactive Pt Sputtering",
  journal="Advanced Healthcare Materials",
  year="2024",
  volume="13",
  number="5",
  pages="7",
  doi="10.1002/adhm.202302400",
  issn="2192-2640",
  url="https://onlinelibrary.wiley.com/doi/10.1002/adhm.202302400"
}