Auteur(s): Blanc C., Nespoulous Mathieu, Angot Emmanuel, Nobili M.
(Article) Publié: Physical Review Letters, vol. 105 p.127801 (2010)
Ref HAL: hal-00518222_v1
DOI: 10.1103/PhysRevLett.105.127801
WoS: 000281870000010
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1 Citation
Résumé:
Liquid crystal defects are used as probes to study the local reorientation dynamics of the nematic surface director on SiOx alignment layers. The tracking of the defect's motion reveals the presence of solid friction forces, unexpected in this complex viscous fluid. We identify the director pinning due to a surface quenched disorder as a possible mechanism that gives rise to the measured solid friction.