Friday, March 8, 2013

1303.1739 (Francesc Salvat-Pujol et al.)

Simulation of electron transport in electron beam induced deposition of
nanostructures
   [PDF]

Francesc Salvat-Pujol, Harald O. Jeschke, Roser Valenti
We present a numerical investigation of energy and charge distributions during electron-beam-induced growth of W nanostructures on SiO2 substrates using Monte Carlo simulation of electron transport. This study gives a quantitative insight into the deposition of energy and charge in the substrate and in already existing metallic nanostructures in the presence of the electron beam. We analyze electron trajectories, inelastic mean free paths, and distribution of backscattered electrons in different deposit compositions and depths. We find that while in the early stages of the nanostructure growth a significant fraction of electron trajectories still interact with the substrate, as the nanostructure becomes thicker, the transport takes place almost exclusively in the nanostructure. In particular, a larger deposit density leads to enhanced electron backscattering. This work shows how mesoscopic radiation-transport techniques can contribute to a model which addresses the multi-scale nature of the electron-beam-induced deposition (EBID) process.
View original: http://arxiv.org/abs/1303.1739

No comments:

Post a Comment