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Effects of Rotating Nanoparticles on the Instability of Dust-Acoustic Waves in a Plasma Containing Superthermal Electrons and Ions

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Charged particles with sizes ranging from tens of nanometer to tens of micrometer are created in various situations such as DC discharges, rf discharges, laser-driven plasmas, processing plasmas used in device fabrications, as well as in space such as interstellar clouds, solar system, etc. In general, a large number of background electrons could stick onto the nanoparticle surface during the charging processes and as a result a significant depletion of the electron number density can be encountered. If charged non-spherical nanoparticles are created, they can rotate due to the interaction with surrounding plasmas or oscillating electric field. Therefore, a significant modification of the conventional plasma wave dispersion relations might be necessary for the complex plasma that consists of electrons, ions and nanoparticles. In this work, the growing of dust-acoustic wave is investigated in the presence of the nanoparticles in a superthermal plasma. Full spectrums of the growth rate of the dust-acoustic wave is obtained and analyzed to investigate the effect of nanoparticle rotation. The superthermal plasma effect on the growth rate is also analyzed. The growth rate was found to be enhanced by the rotation of nanoparticles, but suppressed by the superthermal plasmas.
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Document Type: Research Article

Publication date: January 1, 2011

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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