Photothermal Deflection Spectroscopy of Collected Aerosols
Photothermal Deflection Spectroscopy of Collected Aerosols
Photothermal Deflection Spectroscopy of Collected Aerosols
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Results for Substrate Thermal ConductivityLow Optical Absorption Coefficient ParticleSubstrate thermal conductivity : Air thermal conductivity ratio1.8Increasing substratethermal conductivitydecreases signal decaytimeFor the high absorbancecase, the decay timechanges in a complexfashion due to thecoupling between theparticle to surface throughthe air.<strong>Photothermal</strong> <strong>Deflection</strong><strong>Photothermal</strong> <strong>Deflection</strong>1.61.41.210.80.60.40.202.51.50.50 5 10 15 20 25 30Time [μs]321High Optical Absorbance ParticleSubstrate thermal conductivity : Air thermal conductivity ratio0.11101001000100000.111010010001000000 5 10 15 20 25 30Time [μs]
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