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1. Supramolecular polymerization of chiral molecules devoid of chiral centers

   https://doi.org/10.1002/pi.6111  

   Henderson, Will_R; Castellano, Ronald_K (September 2020, Polymer International)

   Abstract The iterative association of monomer units through noncovalent interactions often leads to chiral supramolecular polymers. Monomers comprising these materials can be further divided into those with chiral centers and those without. The latter class is often less studied but attractive since it features monomer designs with chirality at the core rather than the periphery of the molecules. In this mini‐review, we summarize the existing strategies to construct supramolecular polymers from chiral molecules with no chiral centers and offer perspectives on fundamental trends and differences between them and their counterparts with chiral centers. © 2020 Society of Industrial Chemistry 

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2. Chiral optical properties of metasurfaces comprised of chiral media: effects of geometric and material chirality

   https://doi.org/10.1364/OE.540182  

   Ramamurthy, Maya; Cote, Bryan_M; Ferry, Vivian_E (November 2024, Optics Express)

   We deconvolute the distinct and sometimes competing effects of geometric and material chirality in metastructures created from materials that are intrinsically chiral. We find that overlapping Mie-like resonances in nanodisk arrays leads to 6-fold CD enhancement compared to a uniform film. Furthermore, making the medium chiral does not necessarily increase CD; enhancement depends on the magnitude of the Pasteur parameter and its real and imaginary components. Finally, to demonstrate how geometric and material chirality can be combined, we design a geometrically chiral meta-atom out of chiral media and observe over 9-fold enhancement in both CD andg-factor compared to a metasurface comprised of achiral material. 

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3. Microbubble-assisted concentration and ultrasensitive detection of chiral biomolecules using plasmonic chiral metamaterials

   https://doi.org/10.1117/12.2568024  

   Liu, Yaoran; Wu, Zilong; Zheng, Yuebing (August 2020, SPIE Nanoscience + Engineering, 2020, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XVIII)

   Tanaka, Takuo; Tsai, Din Ping (Ed.)
4. Diverse behaviors in non-uniform chiral and non-chiral swarmalators

   https://doi.org/10.1038/s41467-023-36563-4  

   Ceron, Steven; O’Keeffe, Kevin; Petersen, Kirstin (February 2023, Nature Communications)

   Abstract We study the emergent behaviors of a population of swarming coupled oscillators, dubbed swarmalators. Previous work considered the simplest, idealized case: identical swarmalators with global coupling. Here we expand this work by adding more realistic features: local coupling, non-identical natural frequencies, and chirality. This more realistic model generates a variety of new behaviors including lattices of vortices, beating clusters, and interacting phase waves. Similar behaviors are found across natural and artificial micro-scale collective systems, including social slime mold, spermatozoa vortex arrays, and Quincke rollers. Our results indicate a wide range of future use cases, both to aid characterization and understanding of natural swarms, and to design complex interactions in collective systems from soft and active matter to micro-robotics. 

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5. Chiral Photons from Chiral Gravitational Waves

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   Inomata, Keisuke; Kamionkowski, Marc (July 2019, Physical Review Letters)