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Related Concept Videos

Atomic Force Microscopy01:08

Atomic Force Microscopy

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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Size measurement of nanoparticles using atomic force microscopy.

Jaroslaw Grobelny1, Frank W DelRio, Namboodiri Pradeep

  • 1Ceramics Division, National Institute of Standards and Technology, Gaithersburg, MD, USA.

Methods in Molecular Biology (Clifton, N.J.)
|December 1, 2010
PubMed
Summary

This study details methods for preparing gold nanoparticles for atomic force microscopy (AFM) analysis. It covers sample dispersion, AFM operation, and data analysis for accurate nanoparticle size determination.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Surface Science

Background:

  • Accurate characterization of nanoparticle size is crucial for understanding their properties and applications.
  • Atomic Force Microscopy (AFM) is a powerful technique for nanoscale imaging and dimensional analysis.
  • Standardized procedures are needed for reliable nanoparticle size measurements using AFM.

Purpose of the Study:

  • To provide comprehensive protocols for sample preparation of gold nanoparticles for AFM analysis.
  • To describe the operational parameters and calibration methods for intermittent contact mode AFM.
  • To outline techniques for analyzing and reporting AFM data for nanoparticle size determination.

Main Methods:

  • Sample preparation involving dispersing gold nanoparticles (NIST Au nanoparticle Reference Materials RM 8011, RM 8012, RM 8013) on various surfaces.
  • Atomic Force Microscopy (AFM) operation in intermittent contact (tapping) mode for imaging and height measurement.
  • AFM calibration, data acquisition, analysis, and reporting procedures.

Main Results:

  • Established procedures for effective dispersion of gold nanoparticles on substrates suitable for AFM imaging.
  • Demonstrated successful application of tapping mode AFM for accurate height measurements of nanoparticles.
  • Provided a framework for consistent data analysis and reporting of nanoparticle dimensions.

Conclusions:

  • The outlined procedures enable reliable determination of gold nanoparticle sizes using AFM.
  • Standardized sample preparation and AFM operation are key to obtaining accurate nanoscale measurements.
  • This work facilitates the consistent characterization of nanoparticle reference materials.