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Po, Hong
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article
Chiral Helices Formation by Self-Assembled Molecules on Semiconductor Flexible Substrates
Abstract
The crystal structure of atomically defined colloidal II-VI semiconductor nanoplatelets (NPLs) induces the self-assembly of organic ligands over thousands of nm 2 on the top and bottom basal planes of these anisotropic nanoparticles. NPLs curl into helices under the influence of the surface stress induced by these ligands. We demonstrate the control of the radii of NPLs helices through the ligands described as an anchoring group and an aliphatic chain of a given length. A mechanical model accounting for the misfit strain between the inorganic core and the surface ligands predicts the helices radii. We show how the chirality of the helices can be tuned by the ligands anchoring group and inverted from one population to another.