Parameterization and validation of an accurate force-field for the simulation of alkylamine functionalized silicon (111) surfaces.
The stretching, bending, and torsional force-field parameters for modelling Si (111) surfaces functionalized with alkylamines have been derived from energies, optimized geometries and harmonic frequencies obtained by accurate quantum mechanical calculations. Addition of inter-chain non-bonded parameters from a literature force field leads to computed energies in good agreement with their quantum mechanical counterparts for a large set of geometrical arrangements. The overall force-field was tested through molecular dynamics simulations performed on several models of Si functionalized surfaces, with different coverage percentages. Preliminary results indicate that the presence of a polar terminal amine group yields a surface coating of around 50%.
Barone
Vincenzo
V
Scuola Normale Superiore, piazza dei Cavalieri 7, I-56126 Pisa, Italy.
Cacelli
Ivo
I
Ferretti
Alessandro
A
Monti
Susanna
S
Prampolini
Giacomo
G