title: Lanthanide-based NMR: a tool to investigate component distribution in mixed-monolayer-protected nanoparticles.
abstract: Gd(3+) ions, once bound to the monolayer of organic molecules coating the surface of gold nanoparticles, produce a paramagnetic relaxation enhancement (PRE) that broadens and eventually cancels the signals of the nuclear spins located nearby (within 1.6 nm distance). In the case of nanoparticles coated with mixed monolayers, the signals arising from the different coating molecules experience different PRE, depending on their distance from the binding site. As a consequence, observation of the signal broadening patterns provides direct information on the monolayer organization.
authors.affiliation: Dipartimento di Scienze Chimiche, Università di Padova, via Marzolo 1, 35131 Padova, Italy.
authors.forename: Gaetano
authors.initials: G
authors.lastname: Guarino
authors.forename: Federico
authors.initials: F
authors.lastname: Rastrelli
authors.forename: Paolo
authors.initials: P
authors.lastname: Scrimin
authors.forename: Fabrizio
authors.initials: F
authors.lastname: Mancin