Photothermal Deflection Spectroscopy of Collected Aerosols
Photothermal Deflection Spectroscopy of Collected Aerosols Photothermal Deflection Spectroscopy of Collected Aerosols
Simple IR Laser-ExcitedPhotothermal Deflection ApparatusPositionSensingDetectorCO 2 LaserExcitationLensHe-Ne ProbeLaserGe SubstrateAmmoniun Nitrate AerosolExcitation Fluence = 12 J m -2Malathion Aerosol PDSExcitation Fluence = 45 J m -20.51.20.41.0Signal (V)0.30.20.10.0-0.10.000 0.002 0.004 0.006 0.008 0.010Signal (V)0.80.60.40.20.0-0.20 0.002 0.004 0.006 0.008 0.01Time (s)Time (s)
IR Laser-Excited Photothermal DeflectionApparatus for Aerosol Detection Aerosol samples collected onGe or ZnSe blanks. Pulsed 9.56 μm m CO 2 laser forexcitation HeNe or diode laser probe in“Mirage“ configuration. Bi-cell/operational dividerdeflection detection Adaptive matched filter signalanalysis
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IR Laser-Excited <strong>Photothermal</strong> <strong>Deflection</strong>Apparatus for Aerosol Detection Aerosol samples collected onGe or ZnSe blanks. Pulsed 9.56 μm m CO 2 laser forexcitation HeNe or diode laser probe in“Mirage“ configuration. Bi-cell/operational dividerdeflection detection Adaptive matched filter signalanalysis
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