Evaporation of Gold on NaCl Surfaces as a Way To Control
Spatial Distribution of Nanoparticles: Insights on the Shape and Crystallographic
Orientation
Version 2 2017-10-19, 18:51
Version 1 2017-10-19, 18:49
Posted on 2017-10-19 - 18:51
Herein,
the growth of Au nanoparticles on NaCl surfaces as a way
to control their spatial distribution is explored, giving new insights
into the shape and relative orientation of the resulting nanoparticles
through modern electron microscopy techniques. Their morphological
features depending on the geometry of the NaCl surface site they nucleated
on are described in detail. Also, hitherto unreported small but systematic
angular deviations in the range of 1–4° from the exact
epitaxial orientation were observed. A theoretical approach based
on straightforward elastic energy considerations and yet capable of
accounting for the experimental results was developed. The production
of metallic nanoparticles is a fundamental subject in the development
of nanotechnology, and the fine control of the shape and spatial distribution
is an important issue for the applicability of nanoparticles. Furthermore,
in spite of the extensive research on this topic, some key features
such as the precise mechanism controlling particle shape and particle-substrate
orientation are still not well understood as evidenced by the results
of this work. Thus, a clear understanding of the role played by the
diverse factors involved in epitaxial growth is required to produce
nanoparticles with finely tailored properties.
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Mendoza-Cruz, Rubén; Romeu, David; Bazán-Díaz, Lourdes; Samaniego, José Enrique; Santiago, Ulises; Ponce, Arturo; et al. (2017). Evaporation of Gold on NaCl Surfaces as a Way To Control
Spatial Distribution of Nanoparticles: Insights on the Shape and Crystallographic
Orientation. ACS Publications. Collection. https://doi.org/10.1021/acs.cgd.7b01158
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AUTHORS (7)
RM
Rubén Mendoza-Cruz
DR
David Romeu
LB
Lourdes Bazán-Díaz
JS
José Enrique Samaniego
US
Ulises Santiago
AP
Arturo Ponce
MJ
Miguel José-Yacamán