Recent advances in chiral nanomaterials with unique electric and magnetic properties

Abstract

Research on chiral nanomaterials (NMs) has grown radically with a rapid increase in the number of publications over the past decade. It has attracted a large number of scientists in various fields predominantly because of the emergence of unprecedented electric, optical, and magnetic properties when chirality arises in NMs. For applications, it is particularly informative and fascinating to investigate how chiral NMs interact with electromagnetic waves and magnetic fields, depending on their intrinsic composition properties, atomic distortions, and assembled structures. This review provides an overview of recent advances in chiral NMs, such as semiconducting, metallic, and magnetic nanostructures.

Chiral Spectroscopy of Nanostructures

“…Additionally, chirality can be transferred through the scales from angstroms to meters, which is needed for scalability of the self-assembly process. The successful chirality transfer and local mirror asymmetric interactions competing with electrostatic restrictions also result in the fault tolerance of the self-assembly with respect to high polydispersity of the chiral building blocks. Furthermore, the emergence of new physicochemical properties by chirality induction in self-assembled structures shows great potential in practical applications exemplified by biosensing and chiral catalysis …”

“…4 The successful chirality transfer and local mirror asymmetric interactions competing with electrostatic restrictions also result in the fault tolerance of the self-assembly with respect to high polydispersity of the chiral building blocks. Furthermore, the emergence of new physicochemical properties by chirality induction in self-assembled structures shows great potential in practical applications 16 exemplified by biosensing 17 and chiral catalysis. 18 Determining the self-assembly pathways of chiral building blocks resulting in hierarchically organized complex structures with multiple scales of chirality necessitates a family of dedicated analytical techniques.…”

Spontaneous Co-Assembly of Cellulose Nanocrystals and TiO2 Nanorods Followed by Calcination to Form Cholesteric Inorganic Nanostructures

“…Interest in chiral inorganic nanomaterials has grown due to their unique properties including enhanced chiroptical response, biocompatibility, and superior catalytic activity that open potential applications in chiral photonics, biosensing, chiral separation, and chiral catalysis. − Various chiral nanoparticles and chiral assemblies have been reported with optical activities as quantified by their dissymmetry g -factors ranging from 10 –5 to 1. − Current methods to prepare chiral nanomaterials generally involve chirality transfer from surface ligands, external field-induced assembly, and template-mediated assembly . Chiral external fields, such as circularly polarized light or chiral magnetic fields, can impart chirality into nanoscale assemblies. − Furthermore, inorganic nanoparticles can be processed into chiral shapes that self-assemble into chiral supraparticle structures analogous to molecular self-assembly forming chiral, supramolecular structures.…”

Dynamically tunable multicolor emissions from zero-dimensional Cs3LnCl6 (Ln: europium and terbium) nanocrystals with wide color gamut

“…Multicolor-emitting nanocrystals (NCs) have attracted significant attention for many emerging applications. Generally, luminescent NCs afford a single emission color that is determined during the synthetic procedure, which is tailored by changing the size, 1,2 shape, [3][4][5] and composition of NCs 6,7 or by incorporating dopants. 8,9 In contrast, luminescent colors of multicolor-emitting NCs are tailored via external stimuli such as pressure, 10 temperature, 11,12 and excitation power.…”