Oxygen-defective electrostrictors for soft electromechanics
Electromechanical metal oxides, such as piezoceramics, are often incompatible with soft polymers due to their crystallinity requirements, leading to high processing temperatures. This study explores the potential of ceria-based thin films as electromechanical actuators for flexible electronics. Oxygen-deficient fluorites, like cerium oxide, are centrosymmetric nonpiezoelectric crystalline metal oxides that demonstrate giant electrostriction. These films, deposited at low temperatures, integrate seamlessly with various soft substrates like polyimide and PET. Ceria thin films exhibit remarkable electrostriction (<i>M</i><sub>33</sub> > 10<sup>-16</sup> m<sup>2</sup> V<sup>-2</sup>) and inverse pseudo-piezo coefficients (<i>e</i><sub>33</sub> > 500 pmV<sup>-1</sup>), enabling large displacements in soft electromechanical systems. Our study explores resonant and off-resonant configurations in the low-frequency regime (<1 kHz), demonstrating versatility for three-dimensional and transparent electronics. This work advances the understanding of oxygen-defective metal oxide electromechanical properties and paves the way for developing versatile and efficient electromechanical systems for applications in biomedical devices, optical devices, and beyond.
Authors
- Vincenzo Esposito (ORCID: https://orcid.org/0000-0002-9817-7810)
- Jin Kyu Han (ORCID: https://orcid.org/0000-0001-7557-1877)
- Thomas W. Hansen (ORCID: https://orcid.org/0000-0002-1861-3054)
- Henrik Bruus (ORCID: https://orcid.org/0000-0001-5827-2939)
- Wooseok Song (ORCID: https://orcid.org/0000-0002-0487-2055)
- Daniel Zanetti de Florio (ORCID: https://orcid.org/0000-0002-7291-1917)
- Eugen Stamate (ORCID: https://orcid.org/0000-0002-9649-2438)
- I. Kantor (ORCID: https://orcid.org/0000-0001-5132-8354)
- Jesper Wallentin (ORCID: https://orcid.org/0000-0001-5909-0483)
- Victor Buratto Tinti (ORCID: https://orcid.org/0000-0001-5759-0214)
- Anton Lyksborg-Andersen
- Huaiyu Chen (ORCID: https://orcid.org/0000-0002-5122-486X)
- Valdemar Frederiksen (ORCID: https://orcid.org/0000-0001-9390-7055)
- Garam Bae
Institutions
- Agency for Science, Technology and Research (SG)
- Lund University (SE)
- Institute of Materials Research and Engineering (SG)
- MAX IV Laboratory (SE)
- Korea Research Institute of Chemical Technology (KR)
- Universidade Federal do ABC (BR)
- Sungkyunkwan University (KR)
- Technical University of Denmark (DK)
Publication Details
- Journal
- Science Advances
- Published
- 2024-08-30
- DOI
- https://doi.org/10.1126/sciadv.adq3444
- Citations
- 9
- Primary Topic
- Analytical Chemistry and Sensors
- Type
- article
- Field-Weighted Citation Impact
- 2.60
Funders
- Villum Fonden
- European Commission
- VINNOVA
- Svenska Forskningsrådet Formas
- Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
- Vetenskapsrådet
- DanScatt
- HORIZON EUROPE European Innovation Council