Abstract
We have previously used molecular dynamics to simulate the force oscillations experienced by a model atomic-force-microscope tip brought near a surface under a Lennard-Jones liquid. Here we perform these simulations for additional tip radii. We also apply an Ornstein-Zernicke-type integral equation theory to this system, and obtain force-distance curves for several different state points, tip radii, and surface-liquid potentials. We find this theory to be in good agreement with simulation results for tip-wall separations greater than one molecular diameter. We conclude that the magnitude of the force oscillations experienced by an atomic-force-microscope tip is a linear function of the effective tip radius (at constant temperature) and that measurement of these force curves with a standard solvent could provide a method of estimating the relative radii of different tips.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
