In - situ determination of gas - to - particle reaction generated nanoscaled particles
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چکیده
One method to determine particle size distributions of nanoscaled particles relies on the simultaneous detection of the time resolved laser-induced incandescence signal (LII) at two different wavelengths. Due to the absorption of a short highly-intensive laser pulse the particles are heated up far above the ambient gas temperature. After the laser pulse the particles are cooling down due to heat transfer, radiation and evaporation. The time-resolved LII-signal describes the temporal evolution of the enhanced thermal radiation. With respect to Planck’s law the particle temperature decay can exactly be calculated from the ratio of the time resolved LII-signals at two different wavelengths.
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تاریخ انتشار 2006