Switchable tribology of ferroelectrics
Cho, Seongwoo (University of Geneva. Department of Quantum Matter Physics)
Gaponenko, Iaroslav (University of Geneva. Department of Quantum Matter Physics)
Cordero-Edwards, Kumara (University of Geneva. Department of Quantum Matter Physics (Gènova, Itàlia))
Barceló-Mercader, Jordi (Universitat Politècnica de Catalunya)
Arias, Irene (International Centre for Numerical Methods in Engineering)
Kim, Daeho (Korea Advanced Institute of Science and Technology)
Lichtensteiger, Céline (University of Geneva. Department of Quantum Matter Physics)
Yeom, Jiwon (Korea Advanced Institute of Science and Technology)
Musy, Loïc (University of Geneva. Department of Quantum Matter Physics)
Kim, Hyunji (Korea Advanced Institute of Science and Technology)
Han, Seung Min (Korea Advanced Institute of Science and Technology)
Catalan, Gustau (Institut Català de Nanociència i Nanotecnologia)
Paruch, Patrycja (University of Geneva. Department of Quantum Matter Physics)
Hong, Seungbum (Korea Advanced Institute of Science and Technology)

Data:	2024
Resum:	Switchable tribological properties of ferroelectrics offer an alternative route to visualize and control ferroelectric domains. Here, we observe the switchable friction and wear behavior of ferroelectrics using a nanoscale scanning probe-down domains have lower friction coefficients and show slower wear rates than up domains and can be used as smart masks. This asymmetry is enabled by flexoelectrically coupled polarization in the up and down domains under a sufficiently high contact force. Moreover, we determine that this polarization-sensitive tribological asymmetry is widely applicable across various ferroelectrics with different chemical compositions and crystalline symmetry. Finally, using this switchable tribology and multi-pass patterning with a domain-based dynamic smart mask, we demonstrate three-dimensional nanostructuring exploiting the asymmetric wear rates of up and down domains, which can, furthermore, be scaled up to technologically relevant (mm-cm) size. These findings demonstrate that ferroelectrics are electrically tunable tribological materials at the nanoscale for versatile applications.
Ajuts:	Agencia Estatal de Investigación CEX2018-000797-S European Commission 679451 Agencia Estatal de Investigación RTI2018-101662-B-I00 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-1278
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Publicat a:	Nature communications, Vol. 15 (January 2024) , art. 387, ISSN 2041-1723

DOI: 10.1038/s41467-023-44346-0
PMID: 38195614

10 p, 5.1 MB

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