Photothermal Calorimetry: Simultaneous Measurements of Specific Heat and Thermal Conductivity
The photothermal techniques are based on the periodic heating induced in an investigated sample by a modulated light source, the sample temperature oscillations being detected using various techniques, such as gas microphone1, piezoelectric2, photodeflection3 and photopyroelectric4. The photothermal signal, which is characterized by amplitude and phase, depends on the sample thermal as well as optical properties and may thus be used for thermal parameter measurements of the investigated sample.
KeywordsCritical Exponent Photoacoustic Signal Thermal Diffusion Length Photothermal Technique Liquid Crystal Phase Transition
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