PROBING MOLECULAR ORDERING AT A LIQUID-SOLID INTERFACE WITH A MAGNETICALLY OSCILLATED ATOMIC-FORCE MICROSCOPE

Authors
Citation
Wh. Han et Sm. Lindsay, PROBING MOLECULAR ORDERING AT A LIQUID-SOLID INTERFACE WITH A MAGNETICALLY OSCILLATED ATOMIC-FORCE MICROSCOPE, Applied physics letters, 72(13), 1998, pp. 1656-1658
Citations number
19
Categorie Soggetti
Physics, Applied
Journal title
ISSN journal
00036951
Volume
72
Issue
13
Year of publication
1998
Pages
1656 - 1658
Database
ISI
SICI code
0003-6951(1998)72:13<1656:PMOAAL>2.0.ZU;2-2
Abstract
We have demonstrated the ability of an atomic force microscope operate d in the magnetic aic mode to determine the layered structure of liqui ds at interfaces with high accuracy and reproducibility. Oscillations in surface stiffness were found for octamethylcyclotetrasiloxane (OMCT S) and mesitylene close to a graphite surface and the period of oscill ation allowed us to determine the molecular packing to sub-Angstrom pr ecision. The Young's modulus, measured at the peak stiffness of each l ayer, decreased exponentially with distance from the interface with a decay length of 8.8 Angstrom for OMCTS and 6.5 Angstrom for mesitylene . (C) 1998 American Institute of Physics.