Laser-induced exciplex fluorescence is a well-established technique for liquid-vapor imaging in evaporating sprays that offers phase-dependent spectrally separated emission. However, the accuracy of this approach is limited by substantial crosstalk from the liquid to vapor phase signals. This Letter shows the use of a combination of spectral and temporal filtering to reduce this crosstalk by three orders of magnitude and eliminate the need for temperature-dependent crosstalk corrections in the N,N-diethylmethylamine/fluorobenzene system. The relative decay rates of the liquid and vapor signals are quantified and show crosstalk-free imaging for monodisperse evaporating droplets over a wide range of exciplex tracer concentrations.
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Predicting aromatic exciplex fluorescence emission energies.
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Department of Mechanical and Civil Engineering, The California Institute of Technology, Pasadena, California 91125, USA.
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View Article and Find Full Text PDFLaser-induced exciplex fluorescence is a well-established technique for liquid-vapor imaging in evaporating sprays that offers phase-dependent spectrally separated emission. However, the accuracy of this approach is limited by substantial crosstalk from the liquid to vapor phase signals. This Letter shows the use of a combination of spectral and temporal filtering to reduce this crosstalk by three orders of magnitude and eliminate the need for temperature-dependent crosstalk corrections in the N,N-diethylmethylamine/fluorobenzene system.
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Phys Rev Lett
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Department of Chemistry, Aarhus Univeristy, Langelandsgade 140, 8000 Aarhus C, Denmark.
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