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In-situ heating experiment within an electron microscope were first conducted in the 70´s [cit]. When heat is involved in in-situ TEM experiments, it becomes fundamental to be able to measure the temperature of the sample accurately, especially when quantitative information is needed [cit]. Therefore a temperature calibration method is necessary. Initially the specimen was heated with the use of a furnace surrounding it [cit]. The temperature was monitored with the assistance of a thermocouple attached to the furnace [cit]. With this set up, the real temperature of the specimen might not be the same as the read out of the thermocouple [cit], because it will depend on the nature of the sample itself, the location of the specimen on the support, the presence of gas during the experiment, and the nature of the support. The volume heated in comparison with the volume of the specimen is much bigger. On one hand, this might represent an advantage because it guarantees a uniform temperature distribution on the specimen [cit]. On the other hand, it has a drifting effect, because of the thermal expansion of the materials involved, and a consequent impossibility to have rapid heating and cooling processes [cit].

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