Nanocomposites and nanomaterials

Chiral induction and synthesis of gold nanoparticles with chiral morphology after phase transfer using hydrophobic promesogenic ligands
Filip Bandalewicz1, Natalia Kowalska1 and Wiktor Lewandowski1
1 Faculty of Chemistry, University of Warsaw, Warsaw, Poland
  e-mail: f.bandalewicz@student.uw.edu.pl

In recent years chiral nanomaterials have a wide appeal e.g. plasmon polarizers, nanophotonic or optical sensors. One of the challenges is developing an optimized and reproducible synthesis of this type of nanoparticles. Further functionalization of chiral metallic nanoparticles allows to applicate them in hybrid nanomaterials. Chiral gold nanoparticles are usually synthesized in the aquas environment which is a limiting factor for the possibility to incorporate nanoparticles into other materials such as liquid crystal matrix.

Figure 1. SEM micrograph of obtained chiral gold nanoparticles.

In this work, we present the optimization process of functionalization of chiral gold nanoparticles using promesogenic ligands and colloidal stability measurements in high temperature and organic solvents.  The structure of obtained nanoparticles was confirmed by scanning electron microscopy (SEM) and their chiral properties (before and after the phase transfer) using electron circular dichroism spectroscopy (ECD).