Flexible Superlubricity Unveiled in Sidewinding Motion of Individual Polymeric Chains
| Autor: | J. G. Vilhena, Rémy Pawlak, Philipp D’Astolfo, Xunshan Liu, Enrico Gnecco, Marcin Kisiel, Thilo Glatzel, Rúben Pérez, Robert Häner, Silvio Decurtins, Alexis Baratoff, Giacomo Prampolini, Shi-Xia Liu, Ernst Meyer |
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| Přispěvatelé: | UAM. Departamento de Física Teórica de la Materia Condensada |
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
Superlubricity
Rigid Chain General Physics and Astronomy Atomic Force Física Ultra-Low Friction Molecular Strain Motion of Individual 540 Chemistry 570 Life sciences biology Diffusion Energy Barriers Polymeric Chain Atomic force Diffusion energy barriers Gold surfaces Lows-temperatures Molecular strain Motion of individual Polymeric chain Rigid chain Gold Surfaces Lows-Temperatures |
| Zdroj: | Physical review letters 128 (2022): 216102-1–216102-6. doi:10.1103/PhysRevLett.128.216102 info:cnr-pdr/source/autori:Vilhena J.G.; Pawlak R.; D'Astolfo P.; Liu X.; Gnecco E.; Kisiel M.; Glatzel T.; Perez R.; Haner R.; Decurtins S.; Baratoff A.; Prampolini G.; Liu S.-X.; Meyer E./titolo:Flexible Superlubricity Unveiled in Sidewinding Motion of Individual Polymeric Chains/doi:10.1103%2FPhysRevLett.128.216102/rivista:Physical review letters/anno:2022/pagina_da:216102-1/pagina_a:216102-6/intervallo_pagine:216102-1–216102-6/volume:128 Vilhena, J. G.; Pawlak, Rémy; D’Astolfo, Philipp; Liu, Xunshan; Gnecco, Enrico; Kisiel, Marcin; Glatzel, Thilo; Pérez, Rúben; Häner, Robert; Decurtins, Silvio; Baratoff, Alexis; Prampolini, Giacomo; Liu, Shi-Xia; Meyer, Ernst (2022). Flexible Superlubricity Unveiled in Sidewinding Motion of Individual Polymeric Chains. Physical review letters, 128(21) American Physical Society 10.1103/PhysRevLett.128.216102 |
| DOI: | 10.1103/PhysRevLett.128.216102 |
| Popis: | A combination of low temperature atomic force microcopy and molecular dynamic simulations is used to demonstrate that soft designer molecules realize a sidewinding motion when dragged over a gold surface. Exploiting their longitudinal flexibility, pyrenylene chains are indeed able to lower diffusion energy barriers via on-surface directional locking and molecular strain. The resulting ultralow friction reaches values on the order of tens of pN reported so far only for rigid chains sliding on an incommensurate surface. Therefore, we demonstrate how molecular flexibility can be harnessed to realize complex nanomotion while retaining a superlubric character. This is in contrast with the paradigm guiding the design of most superlubric nanocontacts (mismatched rigid contacting surfaces). |
| Databáze: | OpenAIRE |
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