Bremen 2017 – scientific programme
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P: Fachverband Plasmaphysik
P 7: Complex and Dusty Plasmas
P 7.6: Poster
Monday, March 13, 2017, 16:30–18:30, HS Foyer
Optical charge analysis of nanoparticles in RF discharges — •Harald Krüger and André Melzer — Institute of Physics, University Greifswald
Nanoscaled dust particles of aluminum oxide (Al2O3) in RF discharges can exhibit a charge-dependent resonance in Mie scattering in the infrared spectral range [1]. Measurements of this dependence will be used to determine the charge of the particles trapped in a dusty plasma.
In initial experiments the resonance has been detected. Besides the mere existence, the expected shifts of the resonance by a few wave numbers could not be measured with the resolution of the used FTIR spectrometer. Therefore the spectrum of the charged particles will be recorded in more detail using a high-resolution FTIR spectrometer.
[1] R. L. Heinisch, F.X. Bronold and H. Fehske, Phys. Rev. Lett. 109, 243903 (2012)