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Crystalline structure and squeeze-out dissipation of liquid solvation layers observed by small-amplitude dynamic AFM

Hofbauer, W; Ho, RJ; Hairulnizam, R; Gosvami, NN; O'Shea, SJ; (2009) Crystalline structure and squeeze-out dissipation of liquid solvation layers observed by small-amplitude dynamic AFM. PHYS REV B , 80 (13) , Article 134104. 10.1103/PhysRevB.80.134104.

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Abstract

Using frequency-modulation atomic force microscopy (FM-AFM) at sub-nanometer vibration amplitudes, we find in the system n-dodecanol/graphite that solvation layers may extend for several nanometers into the bulk liquid. These layers maintain crystalline order which can be imaged using FM-AFM. The energy dissipation of the vibrating tip can peak sharply upon penetration of molecular layers. The tip shape appears critical for this effect.

Type:Article
Title:Crystalline structure and squeeze-out dissipation of liquid solvation layers observed by small-amplitude dynamic AFM
DOI:10.1103/PhysRevB.80.134104
Keywords:ATOMIC-FORCE MICROSCOPY, INTERFACES, GRAPHITE, TRANSITION
UCL classification:UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Chemistry

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