Self-assembly of nanorod motors into geometrically regular multimers and their propulsion by ultrasound.

@article{Ahmed2014SelfassemblyON,
  title={Self-assembly of nanorod motors into geometrically regular multimers and their propulsion by ultrasound.},
  author={Suzanne Ahmed and Dillon T Gentekos and Craig A Fink and Thomas E Mallouk},
  journal={ACS nano},
  year={2014},
  volume={8 11},
  pages={11053-60}
}
Segmented gold-ruthenium nanorods (300 ± 30 nm in diameter and 2.0 ± 0.2 μm in length) with thin Ni segments at one end assemble into few-particle, geometrically regular dimers, trimers, and higher multimers while levitated in water by ∼4 MHz ultrasound at the midpoint of a cylindrical acoustic cell. The assembly of the nanorods into multimers is controlled by interactions between the ferromagnetic Ni segments. These assemblies are propelled autonomously in fluids by excitation with ∼4 MHz… CONTINUE READING
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