About this Abstract |
Meeting |
MS&T24: Materials Science & Technology
|
Symposium
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Mesoscale Phenomena in Functional Polycrystals and Nanostructures
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Presentation Title |
Nanoscale Flexoelectric Control of Tribology in Ferroelectrics |
Author(s) |
Seongwoo Cho, Iaroslav Gaponenko, Céline Lichtensteiger, Jordi Barceló-Mercader, Irene Arias, Seungbum Hong, Patrycja Paruch |
On-Site Speaker (Planned) |
Seongwoo Cho |
Abstract Scope |
Artificially induced asymmetric tribological properties of ferroelectrics offer an alternative route to visualize and create ferroelectric domains. Using a nanoscale scanning probe, we observe switchable friction and wear behavior of ferroelectric materials, where down domains exhibit lower friction and wear coefficients compared to up domains. The asymmetry is driven by opposing flexoelectric coupling in the up and down domains under a sufficiently high contact force., and can be applied as both imaging markers for direct visualization and as smart masks for patterning ferroelectric materials. Additionally, combining this switchable tribology with multi-pass patterning to create a domain-based dynamic smart mask, we demonstrate three-dimensional nanostructuring exploiting the asymmetric wear rates of up and down domains. We envision that this top-down, chemical/resist-free, and maskless lithography technique, coupled with high-speed imaging, can be scalably applied to fabricate ferroelectric nano/microstructures and is useful for investigating polarization dynamics with big data acquisition. |