Temperature-modulated inversion and switching of chiroptical responses in dynamic side-by-side oligomers of gold nanorods

Li, Hanbo; Meng, Dejing; Zhang, Chenqi; Ji, Yinglu; Gao, Xinshuang; Hu, Zhijian; Wu, Xiaochun

doi:10.1007/s12274-023-5985-3

Cited by 4 publications

(4 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Exploring a broader range of magnetic elements, including Fe-, Ni-, and Cobased components, and rare-earth magnetic materials, [137] within chiral plasmonic NPs, particularly in alloy, core/shell, and heterostructures, offers more possibilities for magnetic-related chiroptical properties and magnetic-chirality dependent biomedical applications. [138] Stimuli-Responsive Chiral Plasmonic Hybrid Materials: Recent progress has been made in chiral plasmonic materials that exhibit responsiveness to stimuli such as temperature, [139] light, [140] pH, [67] and macroscale mechanical force. [141] These advancements have illuminated opportunities for developing sensing and optoelectronic devices that can be controlled and manipulated based on external factors.…”

Section: Enriching Chiral Plasmonic Hybrid Materials With Special Fun...mentioning

confidence: 99%

Chiral Plasmonic Hybrid Nanostructures: A Gateway to Advanced Chiroptical Materials

Tan,

Fu,

Gao

et al. 2023

Advanced Materials

View full text Add to dashboard Cite

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

show abstract

Section: Enriching Chiral Plasmonic Hybrid Materials With Special Fun...mentioning

confidence: 99%

Chiral Plasmonic Hybrid Nanostructures: A Gateway to Advanced Chiroptical Materials

Tan,

Fu,

Gao

et al. 2023

Advanced Materials

View full text Add to dashboard Cite

show abstract

“…After that, remarkable advances were made. − For instance, using Cys, Tao et al manipulated the site-selective chiral growth of delta-sheets, which enabled the precise modulation of structural chirality and PCD signals . In addition, introduction of thiolated chiral molecules on nanorod assemblies can induce chiroptical responses via chiral molecule–plasmon interaction and the structural torsion of rod assemblies. , Despite the importance of functional chiral surface ligands, probing their surface densities and binding locations is still challenging …”

Section: Introductionmentioning

confidence: 99%

“…20 In addition, introduction of thiolated chiral molecules on nanorod assemblies can induce chiroptical responses via chiral molecule−plasmon interaction and the structural torsion of rod assemblies. 21,22 Despite the importance of functional chiral surface ligands, probing their surface densities and binding locations is still challenging. 23 Among various plasmonic nanostructures, gold nanorods (AuNRs) have occupied a unique position thanks to their welldeveloped synthesis method and easily modulated local plasmons owing to the anisotropic shape.…”

Section: Introductionmentioning

confidence: 99%

Cysteine-Mediated Etching of Gold Nanorods by Ferric Ions: Probing Cys Spatial Distribution Features on a Rod Surface

Zhang,

Shoukat,

et al. 2024

J. Phys. Chem. C

Self Cite

View full text Add to dashboard Cite

Modulating the interaction of chiral molecules with achiral plasmonic nanostructures/superstructures is an important means to realize the transfer of molecular chirality to plasmonic chirality. Especially, adsorption features of chiral molecules, such as chiral cysteine (Cys), have been found to affect chiroptical responses greatly. Herein, we found that Cys modification on gold nanorods (AuNRs) had a remarkable impact on rod etching by ferric ions and gave rise to unique etching patterns encoded with the information on Cys adsorption characteristics. Cys modification significantly accelerated rod etching by bringing Fe3+ to the rod surface via Fe3+-COO– coordination. In combination with transmission electron microscopy (TEM) characterization, we were able to decipher Cys-mediated etching patterns and reconstruct Cys adsorption features on the rod surface. Our findings provide an etch-based strategy to probe the adsorption and spatial distribution of Cys on the rod surface, which will deepen our understanding of chirality transfer mechanisms and provide rational design rules for enhancing plasmonic chirality.

show abstract

“…“τ”-shaped structure array or trilayer tetramer array can obtain enhanced CD signal due to strong near-field coupling between the building blocks. , Previous designs focused on exploring the electric-field enhancement of the SPs to gain much larger chiroptical effects than their natural counterparts; however, the magnetic field part containing half light energy was typically weak and normally made a small contribution to CD enhancement. Moreover, inversing chiroptical responses that favor structure-sensitive applications, such as flipping the CD signals, can generally be observed in two enantiomers with distinct handedness , but rarely realized in a single planar chiral nanostructure.…”

mentioning

confidence: 99%

Inversing Plasmonic Chirality through Locally Turning Building Blocks in a Trident-Shaped Nanostructure Array

Lin,

Chai,

Fan

et al. 2024

J. Phys. Chem. C

View full text Add to dashboard Cite

Structure-sensitive chiroptical properties favor applications such as polarization detection and nonlinearity; however, large-scale tuning of circular dichroism (CD), for instance, flipped signal, is typically realized in two enantiomers with distinct handedness and rarely in a single planar chiral nanostructure. This paper numerically studies a trident-shaped nanostructure array that allows magnetic-field enhancement by forming semiclosed loop currents in quadrupolar localized plasmon (QL) to generate substantial chiroptical responses with a maximum CD magnitude of 33.1%. Locally changing the rotation of the building block at a small angle of 15°can efficiently modify the structural chirality of the unit cells and thus dramatically inverse the chiroptical responses from negative to positive. We arranged two trident-shaped nanostructures with slightly different configurations but opposite optical chirality into a unit to achieve a high-contrast CD signal with a narrowed line width. Calculations show that the new metamaterial with large electromagnetic-field enhancement in sharp corners enables the detection of low-concentration bovine serum albumin protein with the largest sensitivity of S CD = 795 RIU −1 .

show abstract

Temperature-modulated inversion and switching of chiroptical responses in dynamic side-by-side oligomers of gold nanorods

Cited by 4 publications

References 48 publications

Chiral Plasmonic Hybrid Nanostructures: A Gateway to Advanced Chiroptical Materials

Chiral Plasmonic Hybrid Nanostructures: A Gateway to Advanced Chiroptical Materials

Cysteine-Mediated Etching of Gold Nanorods by Ferric Ions: Probing Cys Spatial Distribution Features on a Rod Surface

Inversing Plasmonic Chirality through Locally Turning Building Blocks in a Trident-Shaped Nanostructure Array

Contact Info

Product

Resources

About