Probing molecular ordering at a liquid-solid interface with a magnetically oscillated atomic force microscope

Wenhai Han; Stuart Lindsay

doi:10.1063/1.121143

Probing molecular ordering at a liquid-solid interface with a magnetically oscillated atomic force microscope

Wenhai Han, Stuart Lindsay

Research output: Contribution to journal › Article › peer-review

53 Scopus citations

Abstract

We have demonstrated the ability of an atomic force microscope operated in the magnetic a/c mode to determine the layered structure of liquids at interfaces with high accuracy and reproducibility. Oscillations in surface stiffness were found for octamethylcyclotetrasiloxane (OMCTS) and mesitylene close to a graphite surface and the period of oscillation allowed us to determine the molecular packing to sub-Angstrom precision. The Young's modulus, measured at the peak stiffness of each layer, decreased exponentially with distance from the interface with a decay length of 8.8 Å for OMCTS and 6.5 Å for mesitylene.

Original language	English (US)
Pages (from-to)	1656-1658
Number of pages	3
Journal	Applied Physics Letters
Volume	72
Issue number	13
DOIs	https://doi.org/10.1063/1.121143
State	Published - Dec 1 1998

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.121143

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title = "Probing molecular ordering at a liquid-solid interface with a magnetically oscillated atomic force microscope",

abstract = "We have demonstrated the ability of an atomic force microscope operated in the magnetic a/c mode to determine the layered structure of liquids at interfaces with high accuracy and reproducibility. Oscillations in surface stiffness were found for octamethylcyclotetrasiloxane (OMCTS) and mesitylene close to a graphite surface and the period of oscillation allowed us to determine the molecular packing to sub-Angstrom precision. The Young's modulus, measured at the peak stiffness of each layer, decreased exponentially with distance from the interface with a decay length of 8.8 {\AA} for OMCTS and 6.5 {\AA} for mesitylene.",

author = "Wenhai Han and Stuart Lindsay",

year = "1998",

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AB - We have demonstrated the ability of an atomic force microscope operated in the magnetic a/c mode to determine the layered structure of liquids at interfaces with high accuracy and reproducibility. Oscillations in surface stiffness were found for octamethylcyclotetrasiloxane (OMCTS) and mesitylene close to a graphite surface and the period of oscillation allowed us to determine the molecular packing to sub-Angstrom precision. The Young's modulus, measured at the peak stiffness of each layer, decreased exponentially with distance from the interface with a decay length of 8.8 Å for OMCTS and 6.5 Å for mesitylene.

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Probing molecular ordering at a liquid-solid interface with a magnetically oscillated atomic force microscope

Abstract

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