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Titel: Nanoscale Nickel-Based Thin Films as Highly Conductive Electrodes for Dielectric Elastomer Applications with Extremely High Stretchability up to 200
VerfasserIn: Hubertus, Jonas
Neu, Julian
Croce, Sipontina
Rizzello, Gianluca
Seelecke, Stefan
Schultes, Günter
Sprache: Englisch
Titel: ACS Applied Materials & Interfaces
Bandnummer: 13
Heft: 33
Seiten: 39894-39904
Verlag/Plattform: ACS
Erscheinungsjahr: 2021
Freie Schlagwörter: compliant electrode
sputtered thin film
wrinkles
dielectric elastomer
metallic electrode
electromechanical characterization
DDC-Sachgruppe: 500 Naturwissenschaften
Dokumenttyp: Journalartikel / Zeitschriftenartikel
Abstract: This paper presents on electromechanical characterization of thin film nickel-based wrinkled electrodes for dielectric elastomer (DE) applications. The investigation of a sandwich composed of a very soft and flexible elastomer carrying an ultrathin metallic electrode, together with its prestretch-dependent wrinkled structure of the electrode, facilitates the understanding of some of its interesting properties. Compared to conventional screen-printed carbon black electrodes, nickel-based thin film electrodes offer an ohmic resistance that is about 2 orders of magnitude lower. This remarkable feature makes it an advantageous electrode material alternative for the development of energy-efficient and high-frequency DE applications. Ultrathin (10−20 nm) layers are sputter deposited as electrodes onto either biaxially or, under pure-shear conditions, uniaxially prestretched silicone membranes. After the sputtering process, the membranes are allowed to relax whereby wrinkled out-of-plane buckled surfaces are obtained. With an initial resistance smaller than 400 Ω/square and a strong adhesion to the silicone, some electrode configurations are able to withstand strains up to 200% while remaining electrically conductive. A linear dependence of the capacitance on strain is revealed, as well as a long-term stability over 10 million cycles of mechanical stretching. All investigated thin film configurations of nickel and nickel−carbon films are suitable as compliant electrodes for DE actuators, as demonstrated by measuring the force characteristics with and without a high voltage. An increased level of prestretch shifts the resistance threshold of the electrode layers to even higher strain levels. In general, the best performance is achieved with pure metallic electrodes deposited on biaxially prestretched silicone membranes.
DOI der Erstveröffentlichung: 10.1021/acsami.1c10686
URL der Erstveröffentlichung: https://pubs.acs.org/doi/10.1021/acsami.1c10686
Link zu diesem Datensatz: urn:nbn:de:bsz:291--ds-434135
hdl:20.500.11880/38925
http://dx.doi.org/10.22028/D291-43413
ISSN: 1944-8252
1944-8244
Datum des Eintrags: 8-Nov-2024
Bezeichnung des in Beziehung stehenden Objekts: Supporting Information
In Beziehung stehendes Objekt: https://pubs.acs.org/doi/suppl/10.1021/acsami.1c10686/suppl_file/am1c10686_si_001.mp4
https://pubs.acs.org/doi/suppl/10.1021/acsami.1c10686/suppl_file/am1c10686_si_002.mp4
Fakultät: NT - Naturwissenschaftlich- Technische Fakultät
Fachrichtung: NT - Systems Engineering
Professur: NT - Prof. Dr. Stefan Seelecke
Sammlung:SciDok - Der Wissenschaftsserver der Universität des Saarlandes



Diese Ressource wurde unter folgender Copyright-Bestimmung veröffentlicht: Lizenz von Creative Commons Creative Commons