Phys. Rev. Lett. 101, 266102 (2008) [4 pages]Characteristic Length Scale of Nanorod Diameter during GrowthReceived 14 January 2008; revised 18 November 2008; published 23 December 2008 This Letter proposes a characteristic length scale on surfaces and demonstrates its impact on nanorod growth. The proposed length scale is the dimension of a surface segment bounded by multiple-layer steps. Lattice kinetic Monte Carlo simulations, taking Cu as the prototype of nanorods, show that the proposed length scale (i) exists as the result of a diffusion barrier of adatoms down multiple-layer steps, (ii) dictates that the diameter of metallic nanorods is on the order of several hundred nanometers, and (iii) sets the upper limit of the facet dimension. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.101.266102
DOI:
10.1103/PhysRevLett.101.266102
PACS:
68.65.La, 61.46.Km, 02.70.Uu, 68.55.A−
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