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Related Concept Videos

Atomic Force Microscopy01:08

Atomic Force Microscopy

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Atomic force microscopy (AFM) is a type of scanning probe microscopy that can analyze topographic details of various specimens like ceramics, glass, polymers, and biological samples. AFM offers over 1000 times more resolution than the optical imaging system. Images generated from AFM are three-dimensional surface profiles, offering an advantage over the flat, two-dimensional images from other imaging techniques.
The AFM Probe
The probe is regarded as the heart of any AFM setup and comprises the...
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Sub-nanometer Resolution Imaging with Amplitude-modulation Atomic Force Microscopy in Liquid
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Sub-nanometer Resolution Imaging with Amplitude-modulation Atomic Force Microscopy in Liquid

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Quantifying Liquid Transport and Patterning Using Atomic Force Microscopy.

Nikolaos Farmakidis1, Keith A Brown1,2

  • 1Department of Mechanical Engineering, Boston University , Boston, Massachusetts 02215, United States.

Langmuir : the ACS Journal of Surfaces and Colloids
|May 11, 2017
PubMed
Summary
This summary is machine-generated.

We developed a new Atomic Force Microscopy (AFM) method to precisely measure liquid mass on a probe. This technique enables quantitative analysis of nanoscale soft material transport and improves nanopatterning.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Physical Chemistry

Background:

  • Atomic Force Microscopy (AFM) is crucial for nanoscale material analysis.
  • Studying soft materials like liquids and gels with AFM is challenging due to their flow under stress.

Purpose of the Study:

  • To develop and validate an AFM-based technique for quantitative analysis of soft material transport from a probe to a surface.
  • To enable precise mass measurement of picoliter droplets on an AFM probe.

Main Methods:

  • Loading an AFM probe with 0.3–30 pL liquid droplets.
  • Measuring liquid mass by detecting changes in cantilever vibrational resonance frequency.
  • Correlating real-time mass changes with surface feature volumes for sub-femtoliter droplet transfer.

Main Results:

  • Achieved picogram-scale precision in liquid mass detection using a commercial AFM.
  • Demonstrated successful transfer of sub-femtoliter liquid droplets.
  • Quantified liquid transport scaling with probe liquid mass (mass^1.35).

Conclusions:

  • The developed AFM method allows precise mass measurement and analysis of soft material transport at the nanoscale.
  • This technique opens new possibilities for studying nanoscale capillary and transport phenomena.
  • The method enhances soft material nanopatterning through in situ feedback.