Silver Ions Direct Twin-Plane Formation during the
Overgrowth of Single-Crystal Gold Nanoparticles
Version 2 2016-08-04, 13:56
Version 1 2016-08-03, 15:37
Posted on 2016-08-03 - 00:00
It is commonly agreed
that the crystalline structure of seeds dictates
the crystallinity of final nanoparticles in a seeded-growth process.
Although the formation of monocrystalline particles does require the
use of single-crystal seeds, twin planes may stem from either single-
or polycrystalline seeds. However, experimental control over twin-plane
formation remains difficult to achieve synthetically. Here, we show
that a careful interplay between
kinetics and selective surface passivation offers a unique handle
over the emergence of twin planes (in decahedra and triangles) during
the growth over single-crystalline gold nanoparticles of quasi-spherical
shape. Twinning can be suppressed under conditions of slow kinetics
in the presence of silver ions, yielding single-crystalline particles
with high-index facets.
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Grzelczak, Marek; Sánchez-Iglesias, Ana; Heidari, Hamed; Bals, Sara; Pastoriza-Santos, Isabel; Pérez-Juste, Jorge; et al. (2016). Silver Ions Direct Twin-Plane Formation during the
Overgrowth of Single-Crystal Gold Nanoparticles. ACS Publications. Collection. https://doi.org/10.1021/acsomega.6b00066
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AUTHORS (7)
MG
Marek Grzelczak
AS
Ana Sánchez-Iglesias
HH
Hamed Heidari
SB
Sara Bals
IP
Isabel Pastoriza-Santos
JP
Jorge Pérez-Juste
LL
Luis M. Liz-Marzán