Circularly Polarized Luminescence: Circularly Polarized Luminescence Induced by Chiral Super Nanospaces (Adv. Funct. Mater. 35/2019)

Abstract

In article number 1903246, Fumito Araoka, Suk‐Won Choi, and co‐workers demonstrate circularly polarized luminescence (CPL) from a nanosegregated mesophase consisting only of achiral molecules. CPL is induced through self‐assembled chiral aggregates (in the chiral super nanospace) formed only by achiral molecules. The results introduce the possibility of developing a novel technique for constructing practical CPL active materials.

Racemized photonic crystals for physical unclonable function

“…As such, ongoing studies include adoption of deep learning techniques in the hierarchical verification method to reduce the angle dependency. 41 Foregoing efforts include increasing the encoding capacity of the PUFs by modifying the HNF surface with guest materials such as nanoparticles 9,42 and fluorophores 43 to tune the chiroptical properties. We highlight that our method of utilizing randomness found in nature can be critical for designing next-generation security technologies to combat evolving adversaries.…”

Chiral Carbon Dots and Chiral Carbon Dots with Circularly Polarized Luminescence: Synthesis, Mechanistic Investigation and Applications

“…Chiral structures obtained by surface modification of inorganic nanomaterials using chiral ligands or by self‐assembly of inorganic nanomaterials with chiral templates can interact strongly with photons and cause changes in polarization states to produce CPL [34,37,39,70–74] …”

“…In recent years, more attention has been paid to CCDs with respect to their chiral origin, potential applications and optical phenomena [30] . The potential applications are currently mainly in the biological field, and the optical phenomena have been well‐developed in recent years for two‐photon absorption [30–33] and CPL [34,37] . The photoluminescence (PL) mechanism of CDs is still unclear due to the complexity of their core‐shell structure and the diversity of surface functional groups [35] .…”

A supramolecular assembly-based strategy towards the generation and amplification of photon up-conversion and circularly polarized luminescence

“…B.-C. Kim et al demonstrated CPL activity in a liquid crystalline mesophase obtained from the assembly of achiral molecules. 141 The authors employed a 1 : 1 mixture of a rod-shaped molecule (blended with a small amount of pyrromethene dye) and a bent-core host system. In the mixed state, dye molecules follow a mesogen ordering pattern.…”