Quick self-assembly of bio-inspired multi-dimensional well-ordered structures induced by ultrasonic wave energy
Fig 2
Optical images of self-assembled three-dimensional “soccer balls” by hexagonal polysilicon microplatelets at the water surface in the glass beaker.
(a) An individual “soccer ball” showing the organized pattern of microplatelets (scale bar is 500 μm). (b) A cluster of “soccer balls” randomly generated bubbles by ultrasonic waves and the schematic illustration of the “soccer ball” (inset; scale bar is 400 μm). (c) The “soccer balls” varying in size associated with the size of the bubbles with smaller “soccer ball” with the diameter about 700 μm (inset; scale bar is 200 μm) and larger “soccer ball” with diameter about 4 mm (scale bar is 1 mm).