Biomimetic Hierarchical Assembly of Helical Supraparticles
from Chiral Nanoparticles
Yunlong Zhou
Ryan L. Marson
Greg van Anders
Jian Zhu
Guanxiang Ma
Peter Ercius
Kai Sun
Bongjun Yeom
Sharon C. Glotzer
Nicholas A. Kotov
10.1021/acsnano.5b05983.s001
https://acs.figshare.com/articles/journal_contribution/Biomimetic_Hierarchical_Assembly_of_Helical_Supraparticles_from_Chiral_Nanoparticles/3085345
Chiroptical materials found in butterflies,
beetles, stomatopod
crustaceans, and other creatures are attributed to biocomposites with
helical motifs and multiscale hierarchical organization. These structurally
sophisticated materials self-assemble from primitive nanoscale building
blocks, a process that is simpler and more energy efficient than many
top-down methods currently used to produce similarly sized three-dimensional
materials. Here, we report that molecular-scale chirality of a CdTe
nanoparticle surface can be translated to nanoscale helical assemblies,
leading to chiroptical activity in the visible electromagnetic range.
Chiral CdTe nanoparticles coated with cysteine self-organize around
Te cores to produce helical supraparticles. d<i>-/</i>l<i>-</i>Form of the amino acid determines the
dominant left/right helicity of the supraparticles. Coarse-grained
molecular dynamics simulations with a helical pair-potential confirm
the assembly mechanism and the origin of its enantioselectivity, providing
a framework for engineering three-dimensional chiral materials by
self-assembly. The helical supraparticles further self-organize into
lamellar crystals with liquid crystalline order, demonstrating the
possibility of hierarchical organization and with multiple structural
motifs and length scales determined by molecular-scale asymmetry of
nanoparticle interactions.
2016-02-22 00:00:00
CdTe nanoparticle surface
assembly
helical supraparticles
Chiral Nanoparticles Chiroptical materials
Biomimetic Hierarchical Assembly
nanoscale helical assemblies
Chiral CdTe nanoparticles
motif
nanoscale building blocks