Mass spectrometry and dynamics of gold adatoms observed on the surface of size-selected Au nanoclusters.
Nano Lett
; 12(1): 91-5, 2012 Jan 11.
Article
em En
| MEDLINE
| ID: mdl-22126627
ABSTRACT
We report the imaging, mass spectrum, and dynamical behavior of adatoms and small clusters observed on the surface facets of size-selected, truncated octahedral gold clusters, Au(N) (N = 923 ± 23), via aberration-corrected scanning transmission electron microscopy. Our quantitative atom counting measurements show that most (~70%) of the species on the surface are single Au adatoms. Such species are now proposed as key elements of the atomic structure of both monolayer-protected nanoclusters (nanoparticles) and self-assembled monolayers and may also play a role in gold nanocatalysis. The adatoms are found on both {100} and {111} facets with similar probabilities.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Espectrometria de Massas
/
Nanoestruturas
/
Ouro
Idioma:
En
Revista:
Nano Lett
Ano de publicação:
2012
Tipo de documento:
Article