Comparing growth of titania and carbonaceous dusty nanoparticles in weakly magnetised capacitively coupled plasmas
arxiv(2024)
摘要
This study investigates the growth cycles of titania and carbonaceous dusty
nanoparticles in capacitively coupled radiofrequency plasmas, focusing on the
impact of weak magnetic field of approximately 480 Gauss. The growth of dusty
nanoparticles in these plasmas is cyclic, with particles reaching their maximum
size and subsequently moving out of the plasma, followed by the initiation of a
new particle growth cycle. We compare the growth of titania and carbonaceous
dusty particles in the presence and absence of a magnetic field. The presence
of the magnetic field fastens the growth cycle in both types of dusty plasmas.
Langmuir probe measurement of the background plasma parameters such as electron
temperature and floating potential reveal radial variations in floating
potential but not electron temperature. Furthermore, the magnetic field changes
the radial variation of floating potential. The magnetic field also influences
the spatial distribution of the two dust cloud differently. It is possible that
these differences arises due to the material's different response to the
magnetic field. These findings shed light on the intricate dynamics of titania
and carbonaceous dusty plasma particle growth, offering insights into the
impact of weak magnetization on dust behavior, which have implications for
various applications, from space science to semiconductor processing.
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