A relationship between three-dimensional surface hydration structures and force distribution measured by atomic force microscopy

Miyazawa, Keisuke and Kobayashi, Naritaka and Watkins, Matthew and Shluger, Alexander L. and Amano, Ken-ichi and Fukuma, Takeshi (2016) A relationship between three-dimensional surface hydration structures and force distribution measured by atomic force microscopy. Nanoscale (8). pp. 7334-7342. ISSN 2040-3364

Documents
nanoscale_2016.pdf
[img]
[Download]
[img]
Preview
PDF
nanoscale_2016.pdf - Whole Document

1MB
Item Type:Article
Item Status:Live Archive

Abstract

Hydration plays important roles in various solid–liquid interfacial phenomena. Very recently, three-dimensional scanning force microscopy (3D-SFM) has been proposed as a tool to visualise solvated surfaces and their hydration structures with lateral and vertical (sub) molecular resolution. However, the relationship between the 3D force map obtained and the equilibrium water density, ρ(r), distribution above the surface remains an open question. Here, we investigate this relationship at an interface of an inorganic mineral, fluorite, and water. The force maps measured in pure water are directly compared to force maps generated using the solvent tip approximation (STA) model and from explicit molecular dynamics simulations. The results show that the simulated STA force map describes the major features of the experimentally obtained force image. The agreement between the STA data and the experiment establishes the correspondence between the water density used as an input to the STA model and the experimental hydration structure and thus provides a tool to bridge the experimental force data and atomistic solvation structures. Further applications of this method should improve the accuracy and reliability of both interpretation of 3D-SFM force maps and atomistic simulations in a wide range of solid–liquid interfacial phenomena.

Keywords:Atomic force microscopy, AFM, structure of liquids, NotOAChecked
Subjects:F Physical Sciences > F320 Chemical Physics
F Physical Sciences > F170 Physical Chemistry
Divisions:College of Science > School of Mathematics and Physics
Related URLs:
ID Code:23411
Deposited On:08 Jul 2016 14:07

Repository Staff Only: item control page