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Low-pressure plasmas offer a unique possibility of confinement, control and
fine tailoring of particle properties. Hence, dusty plasmas have grown
into a vast field and new applications of plasma-processed dust particles
are emerging. There is demand for particles with special properties and
for particle-seeded composite materials. For example, the stability of
luminophore particles could be improved by coating with protective Al2O3
films which are deposited by a PECVD process using a metal-organic precursor gas.
Alternatively, the interaction between plasma and injected micro-disperse powder
particles can also be used as a diagnostic tool for the study of plasma surface
processes. Two examples will be provided: the interaction of micro-sized (SiO2)
grains confined in a radiofrequency plasma with an external ion beam as well as
the effect of a dc-magnetron discharge on confined particles during deposition
have been investigated.