Abstract
In this paper we use simulations to investigate the role of the tip in nc-AFM measurementsof dissipated energy. Using a virtual AFM we simulate the experiment focusing on theatomic scale energy dissipation on an NaCl(100) flat surface. The non-conservativeinteraction was treated with the theory of dynamic response and all the calculations werecarried out using an atomistic model; several sets of tips were tested using ionic crystals(NaCl, KBr, MgO), each in different configurations (ideal, vacant, divacant, doped). Usingan MgO-doped tip we were able to calculate a dissipation signal comparable to what istypically measured in experiments. It was not possible to see any dissipation with idealtips, although they still have a significant interaction with the surface and giveatomic contrast in the frequency shift signal. The effect of the scanning speedon measured frequency shift and dissipation is also calculated and discussed.
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.
