1 research outputs found
Speciation of Gold Nanoparticles by Ex Situ Extended X‑ray Absorption Fine Structure and X‑ray Absorption Near Edge Structure
A combined
X-ray absorption near edge structure (XANES) and extended
X-ray absorption fine structure (EXAFS) methodology is here presented
on a series of partially and fully reduced Au<sup>III</sup> samples.
This allows monitoring the relative fraction of Au<sup>III</sup> and
Au<sup>0</sup> in the studied samples, displaying a consistent and
independent outcome. The strategy followed is based, for the first
time, on two structural models that can be fitted simultaneously,
and it evaluates the correlation among strongly correlated parameters
such as coordination number and the Debye–Waller factor. The
results of the present EXAFS and XANES approach can be extended to
studies based on X-ray absorption spectroscopy experiments for the
in situ monitoring of the formation of gold nanoclusters