INVESTIGADORES
GIOVANETTI Lisandro Jose
artículos
Título:
XAFS, SAXS and HREM characterization of Pd nanoparticles capped with n-alkyl thiol molecules.
Autor/es:
J. M. RAMALLO-LOPEZ; GIOVANETTI, L.J.; F. VICENTÍN; M. MARÍN-ALMAZO; M. JOSÉ-YACAMAN; F. G. REQUEJO
Revista:
PHYSICA B - CONDENSED MATTER
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Año: 2007 vol. 389 p. 150 - 154
ISSN:
0921-4526
Resumen:
We report a structural characterization of palladium nanoparticles, with an
average diameter of 1.2 nm, capped with three different n-alkyl thiol
molecules (n=12, 16 and 18). For this purpose several experimental
techniques were used, namely X-ray absorption fine structure (XAFS), small angle
X-ray scattering (SAXS) and high-resolution electron transmission microscopy
(HRTEM). SAXS and HRTEM results yielded the sizes of the Pd nanoparticles in
each sample. The effects of sulfurpalladium interaction on the structural and
electronic properties of the studied material were derived from XAFS results.
This study indicates the presence of sulfurized palladium in the bulk of the
three studied capped Pd nanoparticles. Slight variations in the degree of
sulfidation were detected for nanoclusters with different thiol chain
lengths.