Colloidal Chiral Carbon Dots: An Emerging System for Chiroptical Applications

Advanced Science, Journal Year: 2024, Volume and Issue: 11(13)

Published: Jan. 24, 2024

Chiral CDots (c-CDots) not only inherit those merits from but also exhibit chiral effects in optical, electric, and bio-properties. Therefore, c-CDots have received significant interest a wide range of research communities including chemistry, physics, biology, device engineers. They already made decent progress terms synthesis, together with the exploration their optical properties applications. In this review, chiroptical chirality origin extinction circular dichroism (ECD) circularly polarized luminescence (CPL) is briefly discussed. Then, synthetic strategies summarized, one-pot post-functionalization ligands, assembly into architectures soft templates. Afterward, on applications are elaborated. Research domains such as drug delivery, bio- or chemical sensing, regulation enzyme-like catalysis, others covered. Finally, perspective challenges associated strategies, understanding chirality, potential provided. This review discusses latest developments helps toward better structure-property relationship along respective

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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Tuning the Geometry and Optical Chirality of Pentatwinned Au Nanoparticles with 5-Fold Rotational Symmetry

ACS Nano, Journal Year: 2024, Volume and Issue: 18(13), P. 9543 - 9556

Published: March 22, 2024

Chirality transfer from chiral molecules to nanomaterials represents an important topic for exploring the origin of chirality in many natural and artificial systems. Moreover, developing a promising class holds great significance various applications, including sensing, photonics, catalysis, biomedicine. Here we demonstrate geometric control tunable optical pentatwinned Au nanoparticles with 5-fold rotational symmetry using seed-mediated growth method. A distinctive pathway are observed decahedra as seeds, comparison single-crystal seeds. By employing different peptides inducers, two distinct (pentagonal nanostars pentagonal prisms) obtained. The intriguing formation evolution twinned structure analyzed crystallographic perspective upon maneuvering interplay molecules, surfactants, reducing agents. interesting effects molecular on tuning also explored. Finally, theoretically experimentally investigate far-field near-field properties through numerical simulations single-particle chiroptical measurements. ability tune controlled manner step toward development increasing architectural complexity applications.

Language: Английский

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Structural and Optical Characterization of Reaction Intermediates during Fast Chiral Nanoparticle Growth

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

Published: Feb. 5, 2025

As nanoparticle morphologies produced by seeded growth expand in number and complexity, tracking their evolution during is increasingly important to achieving a mechanistic understanding. However, fast reactions such as chiral growth, which change within seconds, remain challenging monitor at the relevant time scale. We introduce method based on addition of reducing agent NaBH4, enabling interruption gold well access reaction intermediates for morphological optical investigations. show that NaBH4 reduces remaining salt precursors into achiral nanoparticles prevents further target particles, resulting series with intervals down seconds. The demonstrated fast, micelle-directed, single-crystalline or penta-twinned nanorod seeds, showing fine variations temporal chirality depending crystal habit. These provide representative snapshots from continuum, offering platform studying optical-structural relationships.

Language: Английский

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Advances in Enantiomer-Dependent Nanotherapeutics

ACS Nano, Journal Year: 2023, Volume and Issue: 17(11), P. 9850 - 9869

Published: June 2, 2023

The nanoscale properties of nanomaterials, especially nanoparticles, including size, shape, and surface charge, have been extensively studied for their impact on nanomedicine. Given the inherent chiral nature biological systems high enantiomeric selectivity, there is rising interest to manipulate chirality nanomaterials enhance biomolecular interactions improve nanotherapeutics. Chiral nanostructures are currently more prevalently used in biosensing diagnostic applications owing distinctive physical optical properties, but they hold great promise use In this Review, we first discuss stereospecific between biomolecules before comparing synthesis characterization methods nanoparticles nanoassemblies. Finally, examine nanotherapeutics cancer, immunomodulation, neurodegenerative diseases propose plausible mechanisms which interact with cells manipulation. This Review a timely reminder arsenal modifications boost research

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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Single Crystal and Pentatwinned Gold Nanorods Result in Chiral Nanocrystals with Reverse Handedness

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(26)

Published: April 22, 2024

Abstract Handedness is an essential attribute of chiral nanocrystals, having a major influence on their properties. During chemical growth, the handedness nanocrystals usually tuned by selecting corresponding enantiomer molecules involved in asymmetric often known as inducers. We report that, even using same inducer enantiomer, gold can be reversed Au nanorod seeds with either single crystalline or pentatwinned structure. This effect holds for growth induced both amino acids and micelles. Although it was challenging to discern morphological L ‐cystine‐directed particles, electron tomography, cases showed circular dichroism bands opposite sign, nearly mirrored chiroptical signatures micelle‐directed along quasi‐helical wrinkles inverted handedness. These results expand toolbox that might exploited yield host interesting morphologies tunable optical

Language: Английский

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Chiral Plasmonic Hybrid Nanostructures: A Gateway to Advanced Chiroptical Materials

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(3)

Published: Nov. 9, 2023

Abstract Chirality introduces a new dimension of functionality to materials, unlocking possibilities across various fields. When integrated with plasmonic hybrid nanostructures, this attribute synergizes and other functionalities, resulting in unprecedented chiroptical materials that push the boundaries system's capabilities. Recent advancements have illuminated remarkable chiral light–matter interactions within nanomaterials, allowing for harnessing their tunable optical activity components. These led applications areas such as sensing, catalysis, spin optics. Despite these promising developments, there remains need comprehensive synthesis current state‐of‐the‐art knowledge, well thorough understanding construction techniques practical field. This review begins an exploration origins chirality overview latest nanostructures. Furthermore, representative emerging categories nanomaterials are classified summarized, elucidating versatile applications. Finally, engages fundamental challenges associated nanostructures offer insights into future prospects advanced

Language: Английский

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Surface Topographical Engineering of Chiral Au Nanocrystals with Chiral Hot Spots for Plasmon-Enhanced Chiral Discrimination

Nano Letters, Journal Year: 2023, Volume and Issue: 23(17), P. 8233 - 8240

Published: Aug. 17, 2023

Surface roughness in chiral plasmonic nanostructures generates asymmetrical localized electromagnetic fields, which hold great promise for applications recognition, chiroptical spectroscopic sensing, and enantioselective photocatalysis. In this study, we develop a surface topographical engineering approach to precisely manipulate the structures of Au nanocrystals. Through carefully controlling amounts l- or d-cystine (Cys) seed solution growth process, successfully synthesize nanocrystals with highly disordered, ordered, less ordered wrinkled surfaces. An underlying principle governing relationship between roughness, orderliness, response is also proposed. More importantly, wrinkles on surfaces generate electronic fields enhanced intensity, achieve excellent plasmon-enhanced discrimination ability penicillamine (Pen) enantiomers. This work offers exciting prospects manipulating designing sensitive sensors hot spots.

Language: Английский

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Tuning the Plexcitonic Optical Chirality Using Discrete Structurally Chiral Plasmonic Nanoparticles

Nano Letters, Journal Year: 2023, Volume and Issue: 23(23), P. 11376 - 11384

Published: Dec. 1, 2023

Constructing chiral plexcitonic systems with tunable plasmon–exciton coupling may advance the scientific exploitation of strong light–matter interactions. Because their intriguing chiroptical properties, plasmonic materials have shown promising applications in photonics, sensing, and biomedicine. However, nanoparticles excitons remains largely unexplored. Here we demonstrate construction a system using AuAg nanorods J aggregates for tuning optical chirality. Circular dichroism spectroscopy was employed to characterize coupling, which Rabi splitting anticrossing behaviors were observed, whereas extinction spectra exhibited less prominent phenomena. By controlling number molecular energy detuning between plasmons excitons, been able fine-tune The ability chirality opens up unique opportunities exploring interactions boosting development emerging devices.

Language: Английский

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