Temperature‐Controlled Optical Activity and Negative Refractive Index
Sign Up to like & getrecommendations! Published in 2021 at "Advanced Functional Materials"
DOI: 10.1002/adfm.202010249
Abstract: Chiral media exhibit optical activity, which manifests itself as differential retardation and attenuation of circularly polarized electromagnetic waves of opposite handedness. This effect can be described by different refractive indices for left- and right-handed waves… read more here.
Keywords: temperature; structure; optical activity; activity ... See more keywords
Chiral Seeded Growth of Gold Nanorods Into Fourfold Twisted Nanoparticles with Plasmonic Optical Activity
Sign Up to like & getrecommendations! Published in 2022 at "Advanced Materials"
DOI: 10.1002/adma.202208299
Abstract: A robust and reproducible methodology to prepare stable inorganic nanoparticles with chiral morphology may hold the key to the practical utilization of these materials. An optimized chiral growth method to prepare fourfold twisted gold nanorods… read more here.
Keywords: fourfold twisted; growth; optical activity; gold nanorods ... See more keywords
Optical Activity of Chiral Nanoscrolls
Sign Up to like & getrecommendations! Published in 2017 at "Advanced Optical Materials"
DOI: 10.1002/adom.201600982
Abstract: A first quantum-mechanical theory of chiral semiconductor nanoscrolls is presented. The theory allows one to analytically calculate the rotatory strengths and dissymmetry factors of optical transitions inside monodisperse ensembles of randomly oriented nanoscrolls, as well… read more here.
Keywords: rotatory strengths; theory; chiral nanoscrolls; activity chiral ... See more keywords
A General Recipe for Nondispersive Optical Activity in Bilayer Chiral Metamaterials
Sign Up to like & getrecommendations! Published in 2019 at "Advanced Optical Materials"
DOI: 10.1002/adom.201801729
Abstract: By mimicking broken mirror symmetry of naturally existing chiral materials, and exploiting even stronger magnetoelectric coupling, large optical activity has been realized in chiral metamaterials over the past decade. Nevertheless, most of chiral metamaterials demonstrated… read more here.
Keywords: optical activity; nondispersive optical; bilayer chiral; chiral metamaterials ... See more keywords
Transition dipole coupling modeling of optical activity enhancements in macromolecular protein systems.
Sign Up to like & getrecommendations! Published in 2018 at "Chirality"
DOI: 10.1002/chir.22778
Abstract: The transition dipole coupling model allows to vary systematically many parameters, such as chromophore geometries and transition dipoles. We used it to explore conditions favorable to chirality enhancement observed in many experiments on protein amyloidal… read more here.
Keywords: coupling modeling; transition dipole; transition; dipole coupling ... See more keywords
Comparative rotatory power of bent and twisted polyynes.
Sign Up to like & getrecommendations! Published in 2023 at "Chirality"
DOI: 10.1002/chir.23579
Abstract: Linear polyynes of the formula C18 H2 (symmetry D∞h ) were bent in silico by progressively introducing CCC angles less than 180°. The bent structures (symmetry C2v ) were then twisted by introducing torsion angles… read more here.
Keywords: bent; rotatory power; optical activity; bent twisted ... See more keywords
Chiral Nanoparticles with Enhanced Thermal Stability of Chiral Structures through Alloying.
Sign Up to like & getrecommendations! Published in 2022 at "Small"
DOI: 10.1002/smll.202107657
Abstract: Metallic chiral nanoparticles (CNPs) promisingly function as asymmetric catalysts but lack an important study in thermal stability of optical activity that stems from metastable chiral lattices. In this work, annealing is applied to silver (Ag)… read more here.
Keywords: thermal stability; chiral nanoparticles; optical activity; cnps ... See more keywords
Optical activity of lysozyme in solution at 532 nm via signal-reversing cavity ring-down polarimetry
Sign Up to like & getrecommendations! Published in 2020 at "Chemical Physics Letters"
DOI: 10.1016/j.cplett.2020.137345
Abstract: Abstract An improved optical cavity-based polarimetry method is employed to measure the optical activity of lysozyme in water solution, in the concentration range of 0–2 mg/ml. We employ a signal reversing technique, which gives the absolute… read more here.
Keywords: activity lysozyme; cavity; solution; optical activity ... See more keywords
Broadband optical diode and giant nonreciprocal tunable light localization
Sign Up to like & getrecommendations! Published in 2021 at "Optical Materials"
DOI: 10.1016/j.optmat.2021.110807
Abstract: Abstract Some new properties of optical diodes were investigated, as well as compared with the known ones for the following three systems: 1) an isotropic magnetoactive layer, 2) a magnetophotonic crystal layer, and 3) a… read more here.
Keywords: light localization; magneto optical; broadband optical; optical activity ... See more keywords
The Raman optical activity of pinane as compared with (-)α- and (-)β-pinene: The perspective of intramolecular enantiomerism
Sign Up to like & getrecommendations! Published in 2020 at "Vibrational Spectroscopy"
DOI: 10.1016/j.vibspec.2019.102988
Abstract: Abstract The Raman and Raman optical activity (ROA) spectra of chiral pinane were analyzed by a bond polarizability algorithm. By the differential bond polarizability, the chirality of pinane is compared with our previous results of… read more here.
Keywords: pinane compared; pinane; intramolecular enantiomerism; optical activity ... See more keywords
Time-Dependent Formulation of Resonance Raman Optical Activity Spectroscopy.
Sign Up to like & getrecommendations! Published in 2018 at "Journal of chemical theory and computation"
DOI: 10.1021/acs.jctc.8b00488
Abstract: In this work, we extend the theoretical framework recently developed for the simulation of resonance Raman (RR) spectra of medium-to-large sized systems to its chiral counterpart, namely, resonance Raman optical activity (RROA). The theory is… read more here.
Keywords: dependent formulation; time dependent; spectroscopy; optical activity ... See more keywords