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Acoustic Manipulation of Dense Nanorods in Microgravity

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Academic year: 2021

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Figure 1: An acoustic pressure node is generated at mid-height within a cavity. Particles with a positive acoustic contrast factor in suspension have migrated toward the acoustic pressure node to form an aggregate that can be maintained in stable acoustic
Figure 2: a) Evolution of the normalized position of equilibrium for gold particles, as a function of the acoustic energy carried by the acoustic field at f ac = 3.65 MHz, for the three acceleration regimes accessible during micro-gravity flights
Figure 3: Snapshot of acoustically-propelled gold nanorods observed in the levitation plane with dark-field microscopy, in standard laboratory condi-tions (f ac = 1.83 MHz, U pp = 10 V)
Figure 4: a) Sketch of the acoustic resonant cavity. The cavity height is 200 µm, resulting in an acoustic resonant frequency f ac = 3.65 MHz
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