Mechanism of atomic force microscopy imaging of three-dimensional hydration structures at a solid-liquid interface
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Here we present both subnanometer imaging of three-dimensional (3D) hydration structures using atomic force microscopy (AFM) and molecular dynamics simulations of the calcite-water interface. In AFM, by scanning the 3D interfacial space in pure water and recording the force on the tip, a 3D force image can be produced, which can then be directly compared to the simulated 3D water density and forces on a model tip. Analyzing in depth the resemblance between experiment and simulation as a function of the tip-sample distance allowed us to clarify the contrast mechanism in the force images and the reason for their agreement with water density distributions. This work aims to form the theoretical basis for AFM imaging of hydration structures and enables its application to future studies on important interfacial processes at the molecular scale.
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Tip dependence of three-dimensional scanning force microscopy images of calcite-water interfaces investigated by simulation and experimentsMiyazawa, K.; Tracey, J.; Reischl, Bernhard ; Spijker, P.; Foster, A.S.; Rohl, Andrew ; Fukuma, T. (2020)© 2020 The Royal Society of Chemistry. In this study, we have investigated the influence of the tip on the three-dimensional scanning force microscopy (3D-SFM) images of calcite-water interfaces by experiments and ...
Watkins, M.; Reischl, Bernhard (2013)The critical quantity in understanding imaging using an atomic force microscope is the force the sample exerts on the tip. We put forward a simple one-to-one force to water density relationship, explain exactly how it ...
Reischl, Bernhard; Watkins, M.; Foster, A. (2013)High resolution atomic force microscopy (AFM) in liquids offers atomic scale insight into the structure at water/solid interfaces and is perhaps the only tool capable of resolving the nature of formed hydration layers. ...