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Related Concept Videos

Intermolecular Forces in Solutions02:28

Intermolecular Forces in Solutions

The formation of a solution is an example of a spontaneous process, a process that occurs under specified conditions without energy from some external source.
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Intermolecular Forces03:13

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Comparing Intermolecular Forces: Melting Point, Boiling Point, and Miscibility02:34

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Atomic Force Microscopy01:08

Atomic Force Microscopy

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Entropy and Solvation02:05

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Updated: May 7, 2026

Sub-nanometer Resolution Imaging with Amplitude-modulation Atomic Force Microscopy in Liquid
10:25

Sub-nanometer Resolution Imaging with Amplitude-modulation Atomic Force Microscopy in Liquid

Published on: December 20, 2016

Anharmonicity, solvation forces, and resolution in atomic force microscopy at the solid-liquid interface.

Kislon Voïtchovsky1

  • 1Institute of Materials, School of Engineering, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|September 17, 2013
PubMed
Summary
This summary is machine-generated.

Atomic force microscopy (AFM) can image solid-liquid interfaces at the molecular level. This study reveals how tip oscillation amplitude controls resolution, distinguishing between liquid solvation layers and solid properties.

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Atomic Force Microscopy Imaging and Force Spectroscopy of Supported Lipid Bilayers
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Atomic Force Microscopy Imaging and Force Spectroscopy of Supported Lipid Bilayers

Published on: July 22, 2015

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Last Updated: May 7, 2026

Sub-nanometer Resolution Imaging with Amplitude-modulation Atomic Force Microscopy in Liquid
10:25

Sub-nanometer Resolution Imaging with Amplitude-modulation Atomic Force Microscopy in Liquid

Published on: December 20, 2016

Atomic Force Microscopy Imaging and Force Spectroscopy of Supported Lipid Bilayers
10:15

Atomic Force Microscopy Imaging and Force Spectroscopy of Supported Lipid Bilayers

Published on: July 22, 2015

Area of Science:

  • Nanoscale science and technology
  • Surface science
  • Physical chemistry

Background:

  • Solid-liquid interfaces are crucial for many scientific and technological processes.
  • Molecular-level characterization of these interfaces is experimentally challenging.
  • Atomic force microscopy (AFM) offers potential for local, high-precision measurements.

Purpose of the Study:

  • To investigate the relationship between AFM tip oscillation amplitude and interfacial resolution.
  • To establish a criterion for distinguishing between probing liquid solvation layers and solid properties.
  • To provide a method for optimizing AFM resolution at solid-liquid interfaces.

Main Methods:

  • Dynamic operation of AFM at small and large tip oscillation amplitudes.
  • Analysis of tip motion anharmonicities, particularly the second harmonic.
  • Validation through computer simulations.

Main Results:

  • For small amplitudes (A
  • For large amplitudes (A>d), tip-solid interactions dominate, reducing resolution.
  • A nonlinear transition at A~d, quantified by the second harmonic, marks a shift in probed properties.

Conclusions:

  • AFM tip oscillation amplitude is a critical parameter controlling interfacial resolution.
  • The second harmonic of tip oscillation provides an objective criterion to enhance resolution and determine whether results reflect liquid or solid properties.
  • These findings offer a practical guide for optimizing AFM experiments at solid-liquid interfaces.