Atomistic simulations of Au-silica nanocomposite film growth

Abstract

Thermal tweezers for nano-manipulation and trapping of interacting atoms or nanoparticles on crystalline surfaces J. Chem. Phys. 137, 114701 (2012) Thermal conductance at atomically clean and disordered silicon/aluminum interfaces: A molecular dynamics simulation study J. Appl. Phys. 112, 054305 (2012) Non-contact monitoring of Ge and B diffusion in B-doped epitaxial Si1-xGex bi-layers on silicon substrates during rapid thermal annealing by multiwavelength Raman spectroscopy AIP Advances 2, 032150 (2012) Effect of adatom surface diffusivity on microstructure and intrinsic stress evolutions during Ag film growthThe growth of Au-silica nanocomposite film is simulated in the framework of kinetic three dimensional lattice Monte Carlo simulations considering the basic phenomena in the deposition process. In case of co-sputter deposition, the growth kinetics of nanoparticles has been studied taking into consideration the effect of the energetic sputtered species reaching the surface of the film during deposition. Formation of Au nanorod like structures are predicted under certain growth conditions particularly when surface diffusion assisted phase separation plays the dominant role and bulk kinetics is frozen. The observed dependence of the Au nanoparticle size on Au/silica ratio is in agreement with the experimental results.

Towards a Particle Based Simulation of Complex Plasma Driven Nanocomposite Formation

“…The alternative to semianalytical models are computer simulations, for an overview see [10]. Among recent results we mention MC simulations of ions in a magnetron discharge [15], simulation of metal atoms on polymer surfaces during PVD [16], KMC simulation of cesium superlattices on a metal substrate [17] and simulation of the growth of nanocolumns [18]. While there has been substantial progress in modeling processes in complex plasmas over the last years, e.g.…”

The role of phase separation for self-organized surface pattern formation by ion beam erosion and metal atom co-deposition

“…Compositional patterning of metallic alloys due to phase separation was studied with kinetic Monte Carlo simulations [30,37,38]. The role of phase separation was also emphasized by kinetic Monte Carlo simulations of Au-silica nanocomposite film growth [39]. Phase separation also occurs during cone formation by ion beam sputter erosion of Si and seeding with Mo or Ni, usually performed at high temperatures.…”

Synthesis and characterization of Au–Fe alloy nanoparticles embedded in a silica matrix by atom beam sputtering

“…This temperature rise may lead to a transiently spatiotemporal enhancement of surface migration of adatoms and chemical interaction between the landing species. Khan et al 48 indicated that the species of incident energy of 1-100 eV can create a transient temperature rise of 1000 K in a radius of 0.5-2 nm for a few picoseconds. The growth of a thin lm using atom beam sputtering takes into account the following basic processes: (i) absorption and desorption of atoms on the substrate surface, (ii) diffusion of deposited atoms on the surface, and (iii) clustering of atoms leading to the nucleation and growth of nanoparticles.…”