Bioinspired chiral inorganic nanomaterials

Nature Reviews Bioengineering, Journal Year: 2023, Volume and Issue: 1(2), P. 88 - 106

Published: Jan. 27, 2023

From small molecules to entire organisms, evolution has refined biological structures at the nanoscale, microscale and macroscale be chiral—that is, mirror dissymmetric. Chirality results in biological, chemical physical properties that can influenced by circularly polarized electromagnetic fields. Chiral nanoscale materials designed mimic, refine advance chiral geometries, engineer optical, for applications photonics, sensing, catalysis biomedicine. In this Review, we discuss mechanisms underlying chirality transfer nature provide design principles nanomaterials. We highlight how features emerge inorganic during synthesis of nanostructures, outline key nanomaterials, including promising designs biomedical applications, such as biosensing immunomodulation. conclude with an outlook future opportunities challenges, need characterization techniques. nanomaterials induce specific physical, phenomena. This Review discusses biomolecules light allow control which applied optical devices,

Language: Английский

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Halide-assisted differential growth of chiral nanoparticles with threefold rotational symmetry

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: June 24, 2023

Enriching the library of chiral plasmonic nanoparticles that can be chemically mass-produced will greatly facilitate applications plasmonics in areas ranging from constructing optical metamaterials to sensing molecules and activating immune cells. Here we report on a halide-assisted differential growth strategy direct anisotropic Au with tunable sizes diverse morphologies. Anisotropic nanodisks are employed as seeds yield triskelion-shaped threefold rotational symmetry high dissymmetry factors. The averaged scattering g-factors L- D-nanotriskelions large 0.57 - 0.49 at 650 nm, respectively. nanotriskelions have been applied switching devices nanoemitters. We also demonstrate manipulation directional rate enables generation variety morphologies presence homochiral ligands.

Language: Английский

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Expanding the Horizons of Machine Learning in Nanomaterials to Chiral Nanostructures

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(18)

Published: Jan. 19, 2024

Abstract Machine learning holds significant research potential in the field of nanotechnology, enabling nanomaterial structure and property predictions, facilitating materials design discovery, reducing need for time‐consuming labor‐intensive experiments simulations. In contrast to their achiral counterparts, application machine chiral nanomaterials is still its infancy, with a limited number publications date. This despite great advance development new sustainable high values optical activity, circularly polarized luminescence, enantioselectivity, as well analysis structural chirality by electron microscopy. this review, an methods used studying provided, subsequently offering guidance on adapting extending work nanomaterials. An overview within framework synthesis–structure–property–application relationships presented insights how leverage study these highly complex are provided. Some key recent reviewed discussed Finally, review captures achievements, ongoing challenges, prospective outlook very important field.

Language: Английский

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Cu²⁺-Dominated Chirality Transfer from Chiral Molecules to Concave Chiral Au Nanoparticles

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(15), P. 10640 - 10654

Published: April 3, 2024

Foreign ions as additives are of great significance for realizing excellent control over the morphology noble metal nanostructures in state-of-the-art seed-mediated growth method; however, they remain largely unexplored chiral synthesis. Here, we report on a Cu2+-dominated strategy that can direct concave Au nanoparticles with C3-dominant centers. The introduction trace amounts Cu2+ process is found to dominate chirality transfer from molecules nanoparticles, leading formation VC geometry. Both experimental and theoretical results further demonstrate correlation between nanoparticle structure optical nanoparticle. ion by selectively activating deposition atoms along [110] [111] directions, facilitating VC. We be employed generate variety enriched geometric desired chiroptical properties. Concave also exhibit appealing catalytic activity selectivity toward electrocatalytic oxidation enantiomers comparison helicoidal nanoparticles. ability tune controlled manner simply manipulating opens up promising creating nanomaterials increasing architectural diversity chirality-dependent applications.

Language: Английский

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Emerging trends in chiral inorganic nanomaterials for enantioselective catalysis

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: April 25, 2024

Abstract Asymmetric transformations and synthesis have garnered considerable interest in recent decades due to the extensive need for chiral organic compounds biomedical, agrochemical, chemical, food industries. The field of inorganic catalysts, garnering its contributions asymmetric transformations, has witnessed remarkable advancements emerged as a highly innovative research area. Here, we review latest developments this dynamic emerging comprehensively understand advances nanocatalysts stimulate further progress catalysis.

Language: Английский

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Chiral Au Nanorods: Synthesis, Chirality Origin, and Applications

ACS Nano, Journal Year: 2022, Volume and Issue: 16(12), P. 19789 - 19809

Published: Dec. 1, 2022

Chiral Au nanorods (c-Au NRs) with diverse architectures constitute an interesting nanospecies in the field of chiral nanophotonics. The numerous possible plasmonic behaviors NRs can be coupled chirality to initiate, tune, and amplify their chiroptical response. Interdisciplinary technologies have boosted development fabrication applications c-Au NRs. Herein, we focused on role which helps manipulate light–matter interaction nontraditional ways. A broad overview origin, transfer, activities, artificially synthetic methodologies, circularly polarized will summarized discussed. deeper understanding help at nanoscale, reveal natural evolution process taking place, set up a series applications.

Language: Английский

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Tunable Reversal of Circular Dichroism in the Seed-Mediated Growth of Bichiral Plasmonic Nanoparticles

ACS Nano, Journal Year: 2022, Volume and Issue: 16(11), P. 19174 - 19186

Published: Oct. 17, 2022

Plasmonic nanoparticles with an intrinsic chiral structure have emerged as a promising platform for applications in biosensing, medicine, catalysis, separation, and photonics. Quantitative understanding of the correlation between nanoparticle optical chirality becomes increasingly important but still represents significantly challenging task. Here we demonstrate that tunable signal reversal circular dichroism seed-mediated growth plasmonic can be achieved through hybridization bichiral centers without inverting geometric chirality. Both experimental theoretical results demonstrated opposite sign two different geometries. Chiral molecules were found to not only contribute transfer from also manipulate structural evolution synergistically drive formation centers. By deliberately adjusting concentration other synthetic parameters, such reducing agent concentration, capping surfactant amount Au precursor, been able fine-tune nanoparticles. We further crystal seeds play crucial roles The insights gained this work shed light on underlying mechanisms dictating intriguing provide knowledge framework guides rational design nanostructures toward chiroptical applications.

Language: Английский

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Site‐Selective Chiral Growth of Anisotropic Au Triangular Nanoplates for Tuning the Optical Chirality

Small, Journal Year: 2023, Volume and Issue: 19(30)

Published: April 8, 2023

Site-selective chiral growth of anisotropic nanoparticles is great importance to realize the plasmonic nanostructures with delicate geometry and desired optical chirality; however, it remains largely unexplored. This work demonstrates a controlled site-selective system based on seed-mediated Au triangular nanoplates. The involves two distinct underlying pathways, faceted island growth, which are interswitchable upon maneuvering interplay molecules, surfactants, reducing agents. pathway switch governs geometric chirality evolution nanoplates, giving rise tailorable circular dichroism spectra. ability tune in manner by manipulating opens up promising strategy for exploiting metamaterials increasing architectural complexity chiroptical applications.

Language: Английский

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Unraveling the Chirality Transfer from Circularly Polarized Light to Single Plasmonic Nanoparticles

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(11)

Published: Jan. 18, 2024

Due to their broken symmetry, chiral plasmonic nanostructures have unique optical properties and numerous applications. However, there is still a lack of comprehension regarding how chirality transfer occurs between circularly polarized light (CPL) these structures. Here, we thoroughly investigate the plasmon-assisted growth nanoparticles from achiral Au nanocubes (AuNCs) via CPL without involvement any molecule stimulators. We identify structural our synthesized using circular differential scattering (CDS) spectroscopy, which correlated with scanning electron microscopy imaging at both single-particle ensemble levels. Theoretical simulations, including hot-electron surface maps, reveal that plasmon-induced mediated by asymmetric distribution hot electrons on AuNCs under excitation. Furthermore, shed this can also be utilized for in bimetallic systems, such as Ag or Pd AuNCs. The results presented here uncover fundamental aspects light-matter interaction implications future design optimization sensors catalysis, among others.

Language: Английский

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Enantioselective Surface‐Enhanced Raman Scattering by Chiral Au Nanocrystals with Finely Modulated Chiral Fields and Internal Standards

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(35)

Published: July 14, 2024

The chiral discrimination of enantiomers is crucial for drug screening and agricultural production. Surface-enhanced Raman scattering (SERS) proposed discriminating benefiting from plasmonic materials. However, the mechanism enantioselective SERS unclear, fluctuating intensities may result in errors. Herein, this work demonstrates a reliable substrate using Au nanocrystals with finely modulated fields internal standards. Chiral electromagnetic are enhanced after modulation, which conducive to increasing difference enantiomeric intensity, as evidenced by experimental simulation results. Furthermore, stability improved corrective effect standards, relative standard deviation significantly reduced. Using L- D-phenylalanine exhibit stable six times ratio. Theoretical simulations reveal that linearly polarized light can also excite nanocrystals, indicating non-chiral far-field converted into near-field sources nanocrystals. Thus, be elucidated molecules near fields. This study will pave way development related chiroptical technologies.

Language: Английский

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