Micelle-directed chiral seeded growth on anisotropic gold nanocrystals

González‐Rubio, Guillermo; Mosquera, Jesús; Kumar, Vished; Pedrazo‐Tardajos, Adrián; Llombart, Pablo Burriel; Solís, Diego M.; Lobato, Iván; Noya, Eva G.; Guerrero‐Martínez, Andrés; Taboada, J. M.; Obelleiro, F.; MacDowell, Luis G.; Bals, Sara; Liz‐Marzán, Luis M.

doi:10.1126/science.aba0980

Cited by 232 publications

(326 citation statements)

References 61 publications

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“…Chiral Au clusters have attracted broad research interests due to their potential in both fundamental science and application. 69,70 The achiral-core@chiral-ligand configuration is just one kind of the chiral clusters, such as Au 246 (SR) 80 , where R is 4-methylbenzenethiol ligands ( Figure 4A). 71 There are two more kinds of chiral clusters: (1) chiral metal kernels, such as Au 20 (SR) 16 72 ( Figure 4B); (2) chiral arrangement of staple motifs on the surface, such as Au 38 (SR) 24 73 ( Figure 4C).…”

Section: Chirality Transfer From Organics To Inorganicsmentioning

confidence: 99%

Chirality communications between inorganic and organic compounds

Cölfen

2021

SmartMat

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Chirality communications between inorganic and organic compounds bridge the gap between different materials. The transfer is mainly realized by material hybridization andasymmetric synthesis, while the recognition is usually carried out in the form of enantioselective adsorption of organics on inorganics. The transfer and recognition can enlarge the number of chiral materials, which may lead to new applications in many fields.

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Section: Chirality Transfer From Organics To Inorganicsmentioning

confidence: 99%

Chirality communications between inorganic and organic compounds

Cölfen

2021

SmartMat

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“…Chirality in these systems exists at all length scales, from the atomic/molecular level (lattice chirality), up to the macroscopic scale (morphology chirality). Inspired by the chirality in nature and life, most studies of inorganic chiral nanocrystals have been devoted to the synthesis strategies in the past years [28][29][30][31][32][33][34][35][36] . Typical applications of chiral crystals, promising in optical devices and photocatalysis, require the involvement of the interaction with photons/electrons, such as irradiation.…”

Section: Introductionmentioning

confidence: 99%

Chirality Affecting Reaction Dynamics of HgS Nanostructures Simultaneously Visualized in Real and Reciprocal Space

Cao

Liu

et al. 2021

Preprint

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Chirality involved reactions enable to probe features in the fields of asymmetric synthesis and catalysis, which allow to gain insight into the fundamental mechanisms of topochemically controlled reactions. However, in situ observation of the chirality-associated reaction dynamics with simultaneous structural determination of new features has been lacking. Here, we report the direct visualization of the electron-beam-stimulated reaction dynamics of HgS nanostructures with chiral and achiral morphologies simultaneously in both real and reciprocal space. Under the electron-beam excitation of HgS nanostructures, the formation and evaporation dynamics of Hg nanodroplets were vividly pictured while the reciprocal space imaging revealed the structural transformation from monocrystalline to polycrystalline. Such induced changes were size-dependent, which were slowed down when involving the chirality in the nanostructures. The finding offers a fundamental understanding of topochemically controlled reaction mechanisms and holds promise of tuning asymmetric synthesis for catalysis related applications.

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“…Apart from preparing discrete plasmonic chiral nanostructures, [ 3,8 ] chiral assemblies of plasmonic nanoparticles have attracted more attention owing to easy fabrication and feasible dynamic modulation. [ 9 ] Often, the most straightforward and simple way is to organize non‐chiral plasmonic NPs using various chiral templates, [ 10 ] such as DNA, [ 4a,11 ] chiral fibers, and so on [ 6,12 ] into a chiral arrangement along the templates.…”

Section: Introductionmentioning

confidence: 99%

Temperature Effect of Plasmonic Circular Dichroism in Dynamic Oligomers of AuNR@Ag Nanorods Driven by Cysteine: The Role of Surface Atom Migration

Meng

Chen

et al. 2020

Advanced Optical Materials

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plasmonic chirality has the characteristics of strong signal, wide spectral window, and dynamic controllability and holds huge promises in a wide range of applications, [2] such as metamaterials, [3] ultrasensitive detection, [4] enantioselective separation, [5] disease diagnosis (such as Parkinsons [6]), and chiral catalysis. [7] The rapid development of chiroplasmonics not only advances the nanoplasmonics itself but also renovates the old research field of molecular chirality. Apart from preparing discrete plasmonic chiral nanostructures, [3,8] chiral assemblies of plasmonic nanoparticles have attracted more attention owing to easy fabrication and feasible dynamic modulation. [9] Often, the most straightforward and simple way is to organize non-chiral plasmonic NPs using various chiral templates, [10] such as DNA, [4a,11] chiral fibers, and so on [6,12] into a chiral arrangement along the templates. In contrast, it's more difficult and challenging to drive a non-chiral (racemic) assembly into a chiral one (high enantiomeric excess) from the viewpoint of using chiral forces. [13] Previously, we tackled this issue by adsorbing small chiral molecules on non-chiral side-by-side (SS) assemblies of gold nanorods (AuNRs). [14] The chiral forces provided by the adsorbed chiral thiols can convert the non-chiral assemblies into chiral ones. Furthermore, by reducing the assemblies to AuNR dimers, the chirality can be manipulated by circularly polarized lights. [13a] More intriguing, when such chiral assemblies of AuNRs are annealed at elevated temperatures, the plasmonic circular dichroism (PCD) responses can be further amplified with an anisotropic g factor of reaching ≈0.065. [14c] Considering the easy implementation of this treatment, we wonder whether this phenomenon is universal and can be utilized as a general way to modulate chiroptical responses driven by small chiral molecules. From the viewpoints of same crystal structure with similar lattice constants but stronger plasmonic responses, Ag is our first choice. [15] Herein, an Ag shell was formed on the AuNR to expose Ag. The obtained AuNR@Ag was used as assembly unit to form side-by-side oligomers. AuNR@Ag oligomers are used to research PCD temperature amplification effect. However, the maximal annealing temperature of showing PCD amplification Achieving huge chiroptical responses is one of the driving forces for the applications of plasmonic metamaterials. Heat-assisted symmetry breaking can amplify plasmonic circular dichroism (PCD) signals in Au nanorod (AuNR) oligomers; however, the PCD responses disappear on Ag-exposed surface (AuNR@Ag core-shell nanorods) at high temperature. Thus, the inherent reason of different chiral response between Au-and Ag-surface nanorods oligomers is explored, and the chiral mechanism is further cognized. The enhanced mobility of surface Ag atoms at elevated temperatures leads to the damage of cysteine chiral networks on Ag surface. It therefore causes great reduction of chiral drive forces, thus restricting the PCD temperature am...

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Micelle-directed chiral seeded growth on anisotropic gold nanocrystals

Cited by 232 publications

References 61 publications

Chirality communications between inorganic and organic compounds

Chirality communications between inorganic and organic compounds

Chirality Affecting Reaction Dynamics of HgS Nanostructures Simultaneously Visualized in Real and Reciprocal Space

Temperature Effect of Plasmonic Circular Dichroism in Dynamic Oligomers of AuNR@Ag Nanorods Driven by Cysteine: The Role of Surface Atom Migration

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