title: Directed assembly of one- and two-dimensional nanoparticle arrays from pulsed laser induced dewetting of square waveforms.
abstract: The directed assembly of arrayed nanoparticles is demonstrated by dictating the flow of a liquid phase filament on the nanosecond time scale. Results for the assembly of Ni nanoparticles on SiO2 are presented. Previously, we have implemented a sinusoidal perturbation on the edge of a solid phase Ni, thin film strip to tailor nanoparticle assembly. Here, a nonlinear square waveform is explored. This waveform made it possible to expand the range of nanoparticle spacing-radius combinations attainable, which is otherwise limited by the underlying Rayleigh-Plateau type of instability. Simulations of full Navier-Stokes equations based on volume of fluid method were implemented to gain further insight regarding the nature of instability mechanism leading to particle formation in experiments.
authors.affiliation: Department of Materials Science and Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States.
authors.forename: Nicholas A
authors.initials: NA
authors.lastname: Roberts
authors.forename: Jason D
authors.initials: JD
authors.lastname: Fowlkes
authors.forename: Kyle
authors.initials: K
authors.lastname: Mahady
authors.forename: Shahriar
authors.initials: S
authors.lastname: Afkhami
authors.forename: Lou
authors.initials: L
authors.lastname: Kondic
authors.forename: Philip D
authors.initials: PD
authors.lastname: Rack