RT Journal Article
T1 Molecular-scale shear response of the organic semiconductor β-DBDCS (100) surface
A1 Álvarez-Asensio, Rubén
A1 Moreno Ramírez, Jorge S.
A1 Pimentel, Carlos
A1 Casado, Santiago
A1 Matta, Micaela
A1 Gierschner, Johannes
A1 Muccioli, Luca
A1 Yoon, Seong-Jun
A1 Varghese, Shinto
A1 Park, Soo Young
A1 Gnecco, Enrico
A1 Pina Martínez, Carlos Manuel
AB 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.
PB American Physical Society
SN 1550-235X
YR 2017
FD 2017
LK https://hdl.handle.net/20.500.14352/18720
UL https://hdl.handle.net/20.500.14352/18720
LA eng
NO Ministerio de Economía y Competitividad (MINECO)
NO Comunidad de Madrid
NO Campus de Excelencia Internacional (CEI)/ UAM/CSIC
DS Docta Complutense
RD 9 abr 2025