:: RESEARCH ::
:: general interests ::
Development of miniaturized discharges in analytical science
brings the "lab-on-a chip" concept in a strong favourable light.
The plasmas have to be as small as possible, but their
characteristics should be comparable with laboratory big devices.
Our group at ISAS Dortmund works in integrating a dielectric barrier discharge
(DBD) and a microstructured electrode discharge (MSE) in sensitive
detection schemes in order to be able to analyze gaseous, liquid
or solid samples. The pressure range covered by these discharges
is from a few mbar up to 1 bar. Both designs allow the coupling
with a gas chromatograph or laser ablation for sampling. Emission
or absorption spectrometry as well as quadrupole mass spectrometry
are implemented as element selective detection techniques.
Halogenated molecules selective detection gives results comparable
with those reported using other plasma sources.
DBD lower left and MSE upper right