Study of the self-assembly process of an oligo(ethylene glycol)-thioacetyl substituted theophylline (THEO) on gold substrates

Distinct thermoresponsive behaviour of oligo- and poly-ethylene glycol protected gold nanoparticles in concentrated salt solutions

“…Then a 2-fold excess of EGn-SH ligand in respect to the necessary to cover the AuNP surface, was added under vigorous stirring. This concentration was determined by considering the total gold atoms in the nanoparticle surfaces and using a footprint of 20 Å 2 /molecule (this footprint is lower than the observed on flat surfaces 33,34 and ensures that the concentration ratio is sufficient). The mixture was left overnight under shaking to allow for a maximum molecular self-assembly.…”