Surface-selective direct 17O DNP NMR of CeO2 nanoparticles.
Michael Allan HopeDavid M HalatPieter C M M MagusinSubhradip PaulLuming PengClare P GreyPublished in: Chemical communications (Cambridge, England) (2018)
Surface-selective direct 17O DNP has been demonstrated for the first time on CeO2 nanoparticles, for which the first three layers can be distinguished with high selectivity. Polarisation build-up curves show that the polarisation of the (sub-)surface sites builds up faster than the bulk, accounting for the remarkable surface selectivity.