A method for accurate temperature measurement using infrared thermal camera

Area of Science:

• Materials Science
• Analytical Chemistry
• Physics

Background:

• Electron microscopy requires precise sample temperature control.
• Measuring temperature distribution on heated samples, especially thin foils, is challenging.
• Existing methods lack accuracy for localized temperature measurements on heated samples.

Purpose of the Study:

• To develop and discuss a method for accurate temperature distribution measurement on heated samples for electron microscopy.
• To address the challenge of temperature drop at the edges of center-holed molybdenum foils.
• To enable precise thermal analysis of samples during electron microscopy experiments.

Main Methods:

• Utilized an infrared thermal camera to measure temperature distribution.
• Employed a center-holed thin foil of molybdenum as the sample.
• Heated the sample using a specialized sample-heating holder for electron microscopy.

Main Results:

• Temperature near the heating stage closely matched the stage temperature.
• Identified a significant temperature drop at the foil edge farthest from the heating stage.
• Demonstrated the necessity of considering temperature gradients in thermal analysis.

Conclusions:

• Accurate, localized temperature measurement on heated samples is achievable with the developed method.
• The method is essential for understanding thermal behavior in electron microscopy.
• This technique will improve the reliability of experiments involving heated samples.