Understanding 2D atomic resolution imaging of the calcite surface in water by frequency modulation atomic force microscopy
MetadataShow full item record
Frequency modulation atomic force microscopy (FM-AFM) experiments were performed on the calcite (1014) surface in pure water, and a detailed analysis was made of the 2D images at a variety of frequency setpoints. We observed eight different contrast patterns that reproducibly appeared in different experiments and with different measurement parameters. We then performed systematic free energy calculations of the same system using atomistic molecular dynamics to obtain an effective force field for the tip-surface interaction. By using this force field in a virtual AFM simulation we found that each experimental contrast could be reproduced in our simulations by changing the setpoint, regardless of the experimental parameters. This approach offers a generic method for understanding the wide variety of contrast patterns seen on the calcite surface in water, and is generally applicable to AFM imaging in liquids.
Showing items related by title, author, creator and subject.
Morton, Ellen C (2009)The Western Australian School of Mines (WASM) developed a large area static test facility to enable the evaluation of three forms of surface support; namely, mesh, shotcrete and membranes. The purpose of this thesis is ...
Pramanik, Alokesh; Rahman, M. (2012)Study on ultra-precision machining, where diamond cutting tools are used to achieve submicron tolerance and a nano-meter surface finish, has increased since the 1960s. Surfaces of the popular metals (copper and aluminium) ...
Pramanik, Alokesh; Basak, A.; Dong, Yu; Shankar, S.; Littlefair, G. (2018)This study investigated the face milling of nanoparticles reinforced Al-based metal matrix composites (nano-MMCs) using a single insert milling tool. The effects of feed and speed on machined surfaces in terms of surface ...