Chiral plasmonic liquid crystal gold nanoparticles: self-assembly into a circular dichroism responsive helical lamellar superstructure

Abstract

Owing to their proven and potential promises in various technological endeavors ranging from catalysis and sensing to invisibility cloak made from metamaterials, chiral plasmonic superstructures resulting from the directed self-assembly...

Chiral plasmonic nanostructures: recent advances in their synthesis and applications

“…In another recent report, Bhat et al described the synthesis of monodisperse gold nanoparticles coated with liquid crystalline dimer-like arylamines, which spontaneously assembled into a fluid/frozen lamellar structure exhibiting CD activity. 203 The similar hierarchical, cooperative self-assembly/self-organization of gold nanorods, a micelleforming surfactant and bilayer-forming amphiphilic phospholipids led to the formation of a chiral liquid crystal-like mesophase. 204 Finally, dual thermal-and photo-switchable plasmonic chiral assemblies have been prepared using a supramolecular approach with gold nanorods modified with guanosine, deoxyguanosine and boric acid, which form a chiral gel upon mixing.…”

Template-assisted self-assembly of achiral plasmonic nanoparticles into chiral structures

“…90 Besides selfassembly, in situ reduction of gold ions would constitute another interesting route toward plasmonic-liquid crystal hybrid systems. 91 A so-called helical nanolament (HNF) phase, 92 or B4 phase, formed from bent-core mesogens, has been recently reported as a suitable chiral template. This phase owes its special interest to tunable and well-dened helical morphologies, together with a switching capacity upon temperature-driven structural changes.…”

“… 90 Besides self-assembly, in situ reduction of gold ions would constitute another interesting route toward plasmonic-liquid crystal hybrid systems. 91 …”

Recent developments in the chiroptical properties of chiral plasmonic gold nanostructures: bioanalytical applications

“…The thick coating of Au NPs by mesogens produces a negative refractive index. This physical quantity can be utilized for the investigation of metamaterials [29].…”