Thermal measurements AFM

Thermal analysis : Tm & Tg measurements

The probe mounted on a dedicated support is moved to the point selected and placed on the surface of the sample. Then the temperature of the tip is ramped linearly with time while the degree of bending is monitored. At the point of phase transition, the material beneath the tip softens and the probe penetrates into the sample, this provides the nanoscale equivalent of a bulk thermo-mechanical analysis experiment whereby you can measure the phase transition temperatures of the sample such as Tg or Tm.

SThM : Thermal conductivity & temperature measurements

The operation of a Scanning Thermal Microscope is based on Atomic Force Microscopy (AFM) Techniques.
When the atomically sharp AFM tip is placed in proximity to a sample to be studied there is a heat exchange which modifies the temperature of the tip. It is then relatively straightforward to use signals from the tip to create what is effectively a thermal map of the surface.


 Material science

SThM : thermal conductivity measurement on carbon fiber in epoxy
SThM : thermal conductivity measurement on carbon fiber in epoxy

Thermal analysis Benefits

 Tg measurement
 Tm measurement


SThM Benefits

 <50 nm thermal spatial resolution (up to 20 nm)
 0.01 °C sensitivity
 Temperature measurements up to 700 °C
 Thermal conductivity mapping

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