Colloidal
Synthesis of Nanohelices via Bilayer Lattice
Misfit
Posted on 2020-07-07 - 14:39
Helical
structures are ubiquitous in natural and synthetic materials
across multiple length scales. Excellent and sometimes unusual chiral
optical, mechanical, and sensing properties have been previously demonstrated
in such symmetry-breaking shape, yet a general principle to realize
helical structures at the sub-100 nm scale via colloidal synthesis
remains underexplored. In this work, we describe the wet-chemical
synthesis of monodisperse nanohelices based on gadolinium oxide (Gd2O3). Aberration-corrected electron microscopy revealed
that individual nanohelices consist of a bilayer structure with the
outer and inner layers derived from the {111} and {100} planes of
bulk Gd2O3, respectively. Distinct from existing
inorganic nanocoils with flexible bending geometries, the built-in
lattice misfit between two adjacent crystal planes induces continuous
helical growth yielding three-dimensional rigid nanohelices. Furthermore,
the presence of water in the reaction was found to suppress the formation
of nanohelices, producing nanoplates expressing predominantly {111}
planes. Our study not only provides a bottom-up synthetic route and
mechanistic understanding of nanohelices formation but may also open
up new possibilities for creating chiral plasmonic nanostructures,
luminescent biological labels, and nanoscale transducers.
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Liu, Yang; Li, Yuda; Jeong, Soojin; Wang, Yi; Chen, Jun; Ye, Xingchen (2020). Colloidal
Synthesis of Nanohelices via Bilayer Lattice
Misfit. ACS Publications. Collection. https://doi.org/10.1021/jacs.0c05175
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AUTHORS (6)
YL
Yang Liu
YL
Yuda Li
SJ
Soojin Jeong
YW
Yi Wang
JC
Jun Chen
XY
Xingchen Ye
KEYWORDS
Colloidal Synthesishelical growthnanoscale transducerslattice misfitGd 2 O 3sub -100 nm scalehelical structuressymmetry-breaking shapechiral plasmonic nanostructuresbulk Gd 2 O 3Aberration-corrected electron micro...gadolinium oxideBilayer Lattice Misfit Helical stru...crystal planeslength scalesnanohelices formationwet-chemical synthesisbilayer structure