Competing liquidphase instabilities during pulsed laser induced self assembly of copper rings into ordered nanoparticle arrays onSiO2
Nanoscale copper rings of different radii, thicknesses, and widths were synthesized on silicon dioxide thin films and were subsequently liquefied via a nanosecond pulse laser treatment. During the nanoscale liquid lifetimes, the rings experience competing retraction dynamics and thin film and/or Rayleigh–Plateau types of instabilities, which lead to arrays of ordered nanodroplets. Surprisingly, the results are significantly different from those of similar experiments carried out on a Si surface. (1) We use hydrodynamic simulations to elucidate how the different liquid/solid interactions control the different instability mechanisms in the present problem.
Y. Wu, J.D. Fowlkes,N.A. Roberts, J.A. Diez, L. Kondic, A.G. Gonzalez and P.D. Rack, Competing liquidphase instabilities during pulsed laser induced self-assembly of copper rings into ordered nanoparticle arrays onSiO2, Langmuir,27, 21, 2011.