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Atomic Force Microscopy

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: Oct 27, 2025

Advanced Self-Healing Asphalt Reinforced by Graphene Structures: An Atomistic Insight

Advanced Self-Healing Asphalt Reinforced by Graphene Structures: An Atomistic Insight

Published on: May 31, 2022

Effect of Graphene on Modified Asphalt Microstructures Based on Atomic Force Microscopy.

Xian Li¹, Yanmin Wang¹, Yanling Wu¹

¹School of Traffic and Civil Engineering, Shandong Jiaotong University, Jinan 250300, China.

Materials (Basel, Switzerland)

|July 19, 2021

Summary

Graphene addition refines asphalt microstructure by influencing "bee structures," enhancing material properties and improving resistance to aging. This study explores graphene

Keywords:

AFM anti-aging performance bee structures graphene phase transformation theory

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Area of Science:

Materials Science
Nanotechnology
Civil Engineering

Background:

Asphalt microstructure significantly impacts its performance and durability.
Understanding the formation of asphaltic "bee structures" is crucial for material improvement.
Graphene's potential as a modifier for asphalt binders requires detailed investigation.

Purpose of the Study:

To investigate the effect of graphene modifier on asphalt microstructure using Atomic Force Microscopy (AFM).
To elucidate the formation mechanism of asphaltic "bee structures" and graphene's influence.
To evaluate the anti-aging performance of graphene-modified asphalt.

Main Methods:

Atomic Force Microscopy (AFM) for morphological analysis of base and modified asphalt.
Comparative analysis of before- and after-aged asphalt samples.
Application of material science theories (phase transformation, diffusion) to explain mechanisms.

Main Results:

Graphene addition facilitates the nucleation of "bee structures" in asphalt.
Modified asphalt exhibits an increased number and decreased volume of "bee structures".
Graphene incorporation significantly enhances the anti-aging performance of asphalt.

Conclusions:

Graphene acts as a nucleating agent, altering the "bee structure" morphology in asphalt.
The modified microstructure contributes to improved resistance against aging.
Graphene is a promising modifier for enhancing asphalt binder properties.