Evaluation of local thermal conductivity by SThM
It is possible to visualize the phase separation structure of polymers from thermal conductivity information.
The probe tip made of SiO2 is coated with Pd, and the probe itself acts as a resistive element. Therefore, when current flows through the probe tip, a temperature rise occurs, and when it comes into contact with the sample surface, the sample absorbs the heat from the probe. To maintain a constant probe temperature, the amount of electricity supplied to the probe is adjusted, and by plotting the changes in the supplied electricity at each measurement point, the thermal conductivity of the measurement locations (for each material) is visualized as a distribution.
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Applications/Examples of results
In addition to evaluating the mixing of polymer materials, it is also effective for failure analysis and material evaluation, as well as for assessing the thermal properties of semiconductor device constituent materials.