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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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Quantitative Hardness Measurement by Instrumented AFM-indentation

Quantitative Hardness Measurement by Instrumented AFM-indentation

Published on: November 22, 2016

High resolution miniature dilatometer based on an atomic force microscope piezocantilever.

J-H Park¹, D Graf, T P Murphy

¹National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, USA.

The Review of Scientific Instruments

|December 2, 2009

Summary

This summary is machine-generated.

A new, compact dilatometer using an atomic force microscope cantilever was developed. This device accurately measures thermal expansion in challenging conditions, showing performance comparable to existing technologies.

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Published on: June 13, 2023

Area of Science:

Materials Science
Condensed Matter Physics
Nanotechnology

Background:

Thermal expansion (dilation) is crucial for understanding material properties and is linked to specific heat.
Accurate dilation measurements are challenging in confined spaces, low temperatures, and high magnetic fields.
Existing dilatometers often exhibit temperature and field dependence, limiting their use.

Purpose of the Study:

To design and demonstrate a novel, ultrasensitive, millimeter-sized dilatometer.
To overcome limitations of existing dilatometers in extreme experimental conditions.
To study charge density waves in alpha uranium under high magnetic fields.

Main Methods:

Utilized an atomic force microscope (AFM) piezoresistive cantilever as the core sensing element.
Designed an ultracompact dilatometer for sensitive dilation measurements.
Tested the dilatometer's performance in high magnetic fields up to 31 Tesla.

Main Results:

Successfully designed and implemented an ultracompact piezoresistive dilatometer.
Demonstrated the device's capability to measure dilation in extreme environments.
Observed charge density waves in alpha uranium up to 31 T.
Achieved performance comparable to a titanium capacitive dilatometer.

Conclusions:

The developed piezoresistive dilatometer is a versatile and sensitive tool for material property studies.
It offers a viable alternative to conventional dilatometers, especially in challenging experimental conditions.
The device enables new avenues for exploring condensed matter phenomena in extreme fields.