Publications [#261053] of Stefano Curtarolo

Papers Published
  1. Cervantes-Sodi, F; McNicholas, TP; Simmons, JG; Liu, J; Csányi, G; Ferrari, AC; Curtarolo, S, Viscous state effect on the activity of Fe nanocatalysts., Acs Nano, vol. 4 no. 11 (November, 2010), pp. 6950-6956 [20964288], [doi] .

    Many applications of nanotubes and nanowires require controlled bottom-up engineering of these nanostructures. In catalytic chemical vapor deposition, the thermo-kinetic state of the nanocatalysts near the melting point is one of the factors ruling the morphology of the grown structures. We present theoretical and experimental evidence of a viscous state for nanoparticles near their melting point. The state exists over a temperature range scaling inversely with the catalyst size, resulting in enhanced self-diffusion and fluidity across the solid-liquid transformation. The overall effect of this phenomenon on the growth of nanotubes is that, for a given temperature, smaller nanoparticles have a larger reaction rate than larger catalysts.