10 September 2007 Computational modeling of laser-induced self-organization in nanoscopic metal films for predictive nanomanufacturing
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Abstract
Computer models that accurately predict the dynamics of nanoscale self-organization are vital towards knowledge-based nanomanufacturing. Here we present a first principles computational model of laser induced self-organization of thin metallic films (thickness <= 30 nm ) into nanoscale patterns which eventually evolve into ordered nanoparticles. The pattern formation is initiated by a thin film hydrodynamic instability and the ensuing length scales are related to the intrinsic materials properties such as surface tension and van der Waal's dispersion forces. We discuss a fully implicit, finite-difference method with adaptive time step and mesh size control for the solution of the nonlinear, fourth-order PDE governing the thin film dynamics. These simulations capture the changing morphology of the film due to the competition between surface tension and van der Waals forces. Simulation results are used to understand the nonlinear amplifcation of film height perturbations ~(KT/γ)1/2, where K, T and γ represent the Boltzmann constant, absolute temperature, and surface tension respectively,leading eventually to film rupture.
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Justin Trice, Justin Trice, Ramki Kalyanaraman, Ramki Kalyanaraman, Radhakrishna Sureshkumar, Radhakrishna Sureshkumar, } "Computational modeling of laser-induced self-organization in nanoscopic metal films for predictive nanomanufacturing", Proc. SPIE 6648, Instrumentation, Metrology, and Standards for Nanomanufacturing, 66480K (10 September 2007); doi: 10.1117/12.734510; https://doi.org/10.1117/12.734510
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