Shell Dependence of Highly Tunable Circular Dichroism in Chiral Hybrid Plasmonic Nanomaterials for Chiroptical Applications

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 9, 2025

Chiral plasmonic nanomaterials with fascinating physical and chemical properties show emerging chirality-dependent applications in photonics, catalysis, sensing. The capability to precisely manipulate the chirality a broad spectral range plays crucial role enabling of chiral diverse complex scenarios; however, it remains challenge yet be addressed. Here we demonstrate strategy significantly enhance tunability circular dichroism (CD) spectra by constructing core-shell hybrid metal-semiconductor structures tailored shells. In typical case, Au@Cu

Language: Английский

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Recent Advances in Chiral Gold Nanomaterials: From Synthesis to Applications

Molecules, Journal Year: 2025, Volume and Issue: 30(4), P. 829 - 829

Published: Feb. 11, 2025

In recent years, the field of chiral gold nanomaterials has witnessed significant advancements driven by their unique properties and diverse applications in various scientific domains. This review provides an in-depth examination synthesis methodologies evolving nanomaterials, which have emerged as vital tools areas such antibacterial therapies, biosensing, catalysis, nanomedicine. We start discussing techniques, focused on seed-mediated growth circularly polarized light-assisted methods, each contributing to controlled nanostructures with tailored optical activities. further delves into these showcasing potential combating antibiotic-resistant bacteria, improving cancer immunotherapy, promoting tissue regeneration, enabling precise biosensing through enhanced sensitivity selectivity. highlight fundamental principles chirality its critical role biological systems, emphasizing importance enhancing signals facilitating molecular interactions. By consolidating findings methodologies, this endeavors illuminate promising future addressing contemporary challenges.

Language: Английский

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Electron delocalization engineering via hierarchical modulation in single-atom catalysts for highly efficient electrochemical CO2 reduction

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 160634 - 160634

Published: Feb. 1, 2025

Language: Английский

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Strong Chiro-Optical Activity of Plasmonic Metasurfaces with Inverted Pyramid Arrays

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: March 3, 2025

Chiral plasmonics has emerged as a powerful tool for manipulating light at the nanoscale with unprecedented control over polarization. The advances in nanofabrication have led to creation of nanostructures that support strong chiroptical responses. However, complexity fabrication and associated high costs remain major challenges upscaling these architectures. Here, we report on development chiral plasmonic metasurfaces composed inverted pyramid arrays mismatched directions respect lattice vectors array. These are fabricated using combination soft lithography anisotropic etching, resulting cost-effective reproducible without need expensive equipment. exhibit differential transmittance values visible spectrum, which among highest reported films. Theoretical modeling corroborates experimental results, demonstrating significant influence mismatch angle behavior. Complete polarimetric characterization reveals exceptional chiro-optical activity circular birefringence exceeding 375°/μm Kuhn's dissymmetry factors (g-factors) approaching unity.

Language: Английский

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Single Nanoparticle Collision Electrocatalysis Driven by Ultrafast High-Temperature Precision Synthesis

Nano Letters, Journal Year: 2025, Volume and Issue: unknown

Published: May 9, 2025

The single nanoparticle (NP) collision strategy offers a promising alternative to traditional ensemble methods in electrocatalysis, providing unique insights into catalytic behavior that cannot be captured by ensemble-based techniques. However, synthesizing colloidal NP catalysts with tunable composition, uniform size, and near-pristine surfaces remains significant challenge. Here, using PtxRu1-x alloys as model system, we propose an innovative combines ultrafast high-temperature precision synthesis ultrasonic exfoliation. This approach enables the preparation of desired properties, which were previously difficult achieve. Single electrocatalysis uncovers composition-dependent intrinsic activity methanol oxidation reaction (MOR) at industrial current densities, bypassing mass transfer limitations. Density functional theory (DFT) calculations highlight Pt-Ru synergistic effect optimizing MOR performance. study, for first time, integrates new framework development highly efficient catalysts.

Language: Английский

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Etching‐Based Chiroplasmonic Sensing with Helicoid Au Nanocrystals for Anti‐Interference Biochemical Detection

Small, Journal Year: 2025, Volume and Issue: unknown

Published: May 12, 2025

Abstract Plasmonic nanomaterials with intrinsic chiral morphology represent a profound and intriguing topic in sensing applications due to their ultrasensitive structure‐dependent chiroptical activity. Here, an H 2 O ‐assisted etching strategy is reported, enabling the tunable activity of helicoid Au nanocrystals by varying size morphology. This approach forms foundation chiroplasmonic method leveraging signal response induced morphological changes. Notably, exhibits excellent anti‐interference performance, reliable detection complex colored sample environments. Moreover, extended for glucose through oxidase‐catalyzed production, quantitative real samples confirming its reliability. The based on nanocrystal remarkable performance environments, offering potential practical biochemical analysis diagnostics.

Language: Английский

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Dynamically Tunable Chiroptical Activities of Flexible Chiral Plasmonic Film via Surface Buckling

Small, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 15, 2024

Plasmonic nanoparticle-based chiral materials have attracted great interest due to their strong light-matter interaction and tunable resonance frequency. However, challenges remain in dynamically modulating the chiroptical activities while maintain signals. Here, assemblies of gold nanospheres(AuNSs) are achieved via mechanical-induced surface buckling elastic materials, which linear chain AuNSs transform into 3D "S-liked" morphology along with formation unidirectional wrinkles during buckling. This asymmetrical structure leads responses, exhibiting circular dichroism (CD) response over vis-NIR range signal as high 2.6 degrees a g-factor up 0.11. Furthermore, configuration assembly is closely associated wrinkle shape, can be tuned through post-stretching. method facilitates mechanically induced dynamic reversible modulation CD magnitude, well switching handedness. Taking advantages alterable signal, plasmonic structures demonstrate potential for multi-channel switchable information encryption prototype. The strategy, based on manipulating patterns soft opens new design principle constructing continuously adjustable manner, advancing development optical materials.

Language: Английский

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Raman spectroscopic technologies for chiral discrimination: Current status and new frontiers

Coordination Chemistry Reviews, Journal Year: 2024, Volume and Issue: 526, P. 216375 - 216375

Published: Dec. 10, 2024

Language: Английский

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