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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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Related Experiment Video

Updated: Jun 30, 2026

Rapid Mix Preparation of Bioinspired Nanoscale Hydroxyapatite for Biomedical Applications
05:41

Rapid Mix Preparation of Bioinspired Nanoscale Hydroxyapatite for Biomedical Applications

Published on: February 23, 2017

Atomic force microscopy reveals hydroxyapatite-citrate interfacial structure at the atomic level.

Wenge Jiang1, Haihua Pan, Yurong Cai

  • 1Center for Biomaterials and Biopathways and Department of Chemistry, Zhejiang University, Hangzhou, Zhejiang 310027, China.

Langmuir : the ACS Journal of Surfaces and Colloids
|October 1, 2008
PubMed
Summary
This summary is machine-generated.

Atomic force microscopy reveals atomic-level details of citrate binding to hydroxyapatite. This new understanding of biomineralization interfaces challenges previous models and enhances adhesion forces.

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Sub-nanometer Resolution Imaging with Amplitude-modulation Atomic Force Microscopy in Liquid
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Rapid Mix Preparation of Bioinspired Nanoscale Hydroxyapatite for Biomedical Applications
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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

Area of Science:

  • Biomineralization
  • Materials Science
  • Surface Chemistry

Background:

  • Understanding organic-inorganic interfaces at the atomic level is crucial for biomineralization studies.
  • Previous models for citrate adsorption on hydroxyapatite (HAP) lacked atomic-level resolution.

Purpose of the Study:

  • To investigate the atomic-level interactions between citrate and hydroxyapatite (HAP).
  • To demonstrate the utility of atomic force microscopy (AFM) for characterizing biomineral interfaces.

Main Methods:

  • Utilized atomic force microscopy (AFM) to study citrate adsorption on a (100) hydroxyapatite (HAP) surface.
  • Employed a model system of HAP and citrate for experimental analysis.

Main Results:

  • Experimentally determined that only a side carboxylate and a surface calcium ion are involved in citrate binding to HAP, contradicting prior Langmuir adsorption and simulation findings.
  • Observed self-assembly of adsorbed citrate molecules on the HAP surface via their free carboxylate and hydroxyl groups.
  • Found that citrate molecules enhance the adhesion force of HAP crystal faces.

Conclusions:

  • AFM provides a powerful tool for detailed discovery of biomineral interfaces at the atomic level.
  • The established AFM method enables precise and direct understanding of biointerfaces.
  • Findings offer new insights into the mechanisms of citrate-HAP interactions relevant to biomineralization.