Sequential Bending and Twisting around C-C Single Bonds by Mechanical Lifting of a Pre-Adsorbed Polymer

Pawlak, Rémy and Vilhena, J. G. and D'Astolfo, Philipp and Liu, Xunshan and Prampolini, Giacomo and Meier, Tobias and Glatzel, Thilo and Lemkul, Justin A. and Häner, Robert and Decurtins, Silvio and Baratoff, Alexis and Pérez, Rubén and Liu, Shi-Xia and Meyer, Ernst. (2020) Sequential Bending and Twisting around C-C Single Bonds by Mechanical Lifting of a Pre-Adsorbed Polymer. Nano Letters, 20 (1). pp. 652-657.

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Official URL: https://edoc.unibas.ch/73644/

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Bending and twisting around carbonâEuro"carbon single bonds are ubiquitous in natural and synthetic polymers. Force-induced changes were so far not measured at the single-monomer level, owing to limited ways to apply local forces. We quantified down to the submolecular level the mechanical response within individual poly-pyrenylene chains upon their detachment from a gold surface with an atomic force microscope at 5 K. Computer simulations based on a dedicated force field reproduce the experimental traces and reveal symmetry-broken bent and rotated conformations of the sliding physisorbed segment besides steric hindrance of the just lifted monomer. Our study also shows that the tipâEuro"molecule bond remains intact but remarkably soft and links force variations to complex but well-defined conformational changes.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Nanomechanik (Meyer)
UniBasel Contributors:Pawlak, Rémy and Vilhena Albuquerque D'Orey, José Guilherme and D'Astolfo, Philipp and Meier, Tobias and Baratoff, Alexis and Meyer, Ernst and Glatzel, Thilo
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Chemical Society
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:07 Apr 2022 09:24
Deposited On:15 Apr 2020 15:53

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