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Schematic diagram of experimental set-up.
Levitation of dust particles between two electrodes.
(a)–(e) Five single frames from real-time video—a successive development of interfacial instability, void-like instability, and new generation of dust particles (at 162 s, 250 s, 350 s, 430 s, 540 s, respectively).
Growth of the diameter of void-like structure in horizontal and vertical direction with time.
Dust density variation from low to high density region.
(a)–(d) Generations of self excited dust density waves, arrow indicates the direction of wave propagation coexisted with the stationary band structure in lesser dense region.
(a) and (b) Density profile of propagating wave as shown from Fig. 6 . The x-axis denotes horizontal direction of the propagating wave.
Summary of time-dependent experimental observations.
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