Modeling of nano-wires by single ion hitting for Si-based polymers

Non-homogeneous crosslinking reactions along ion trajectories promote isolated cylindrical nano-wires of which sizes are completely under control. G-values of crosslinking reaction (G(x)) mainly determine the size of nano-wire, especially its cylindrical cross section. High energy heavy ion beam irradiation to polysilanes, polycarbosilane, and polyvinylsilane thin films gives the nanowires with a variety of dimensions. The values of radii of the cross section change from ∼3 to ∼30 nm with an increase in G(x), molecular weight of the target polymers, and energy deposition rate of incident particle (LET). We also report the modeling of the nano-wires by thermal and chemical treatment in the present study