2026-06-29T02:40:53Zhttps://docta.ucm.es/rest/oai/requestoai:docta.ucm.es:20.500.14352/187202026-01-26T13:09:13Zcom_20.500.14352_14col_20.500.14352_15
Docta Complutense
author
Álvarez-Asensio, Rubén
author
Moreno Ramírez, Jorge S.
author
Pimentel Guerra, Carlos
author
Casado, Santiago
author
Matta, Micaela
author
Gierschner, Johannes
author
Muccioli, Luca
author
Yoon, Seong-Jun
author
Varghese, Shinto
author
Park, Soo Young
author
Gnecco, Enrico
author
Pina Martínez, Carlos Manuel
2023-06-17T22:38:30Z
2023-06-17T22:38:30Z
2017
1550-235X
10.1103/PhysRevB.96.115422
https://hdl.handle.net/20.500.14352/18720
https://journals.aps.org/prb/abstract/10.1103/PhysRevB.96.115422
In this work we present friction-force microscopy (FFM) lattice-resolved images acquired on the (100) facet of the semiconductor organic oligomer (2Z,2'Z) − 3,3'-(1,4-phenylene)bis(2-(4-butoxyphenyl)acrylonitrile) (β-DBDCS) crystal in water at room temperature. Stick-slip contrast, lateral contact stiffness, and friction forces are found to depend strongly on the sliding direction due to the anisotropic packing of the molecular chains forming the crystal surface along the [010] and [001] directions. The anisotropy also causes the maximum value of the normal force applicable before wearing to increase by a factor of 3 when the scan is performed along the [001] direction on the (100) face. Altogether, our results contribute to achieving a better understanding of the molecular origin of friction anisotropy on soft crystalline surfaces, which has been often hypothesized but rarely investigated in the literature.
eng
Molecular-scale shear response of the organic semiconductor β-DBDCS (100) surface
journal article
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https://docta.ucm.es/bitstreams/a7ffbf19-67f3-4a39-8655-4e14f85c10be/download
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2120664
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Molecular-scale shear response of the organic semiconductor β-DBDCS (100) surface_PhysRevB.96.Álvarez-Asensio et al 2017.pdf