Seed-directed synthesis of chiroptically active Au nanocrystals of varied symmetries

Googasian, Jack S.; Lewis, George R.; Woessner, Zachary J.; Ringe, Emilie; Skrabalak, Sara E.

doi:10.1039/d2cc04126j

Cited by 9 publications

(13 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Based on these mechanisms, CD spectroscopy, obtained at the extinction position of c-Au NRs such as a differential absorption, has usually been employed to discern the conformation structures of c-Au NRs. Chiral nanostructures, such as nanospheres, prisms, − flowers, and helicoids, , have been often fabricated via seed-mediated growth methods, during which the thermodynamics and kinetic parameters can be adjusted to obtain the desired chiral nanomaterials. Anisotropic nanomaterials have the merits of regiospecific functionalization and directional interactions for their assembly, in comparison to isotropic nanomaterials.…”

Section: Introductionmentioning

confidence: 99%

Chiral Au Nanorods: Synthesis, Chirality Origin, and Applications

et al. 2022

View full text Add to dashboard Cite

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

show abstract

Section: Introductionmentioning

confidence: 99%

Chiral Au Nanorods: Synthesis, Chirality Origin, and Applications

et al. 2022

View full text Add to dashboard Cite

show abstract

“…This effect is illustrated well by considering the simulation of intrinsically chiral Au nanocrystals such as those grown from tetrahedral seeds shown in Figure 3E; these nanocrystals consist of two flattened ellipsoids stacked on top of each other but offset by 90°. 59 For brevity, these chiral nanocrystals will be referred to in this text as tetrahedral-seeded chiral Au nanocrystals. In Figure 3F are the simulated scattering spectra of the tetrahedral-seeded chiral Au nanocrystals, where each color trace corresponds with a g-factor spectrum from a different orientation.…”

Section: Fdtd Simulationsmentioning

confidence: 99%

“…However, this tomographically generated model was used in FDTD simulations, and by averaging over the various orientations as discussed in the previous section, good agreement between experiment and simulation was possible (Figure 4I versus Figure 4J). 59 We particularly found this approach beneficial as there is also a need to untangle the chiroptical activity from near-field enhancement emanating from surface-bound chiral growth molecules. 59 We anticipate that the application of tomographic reconstructions to create models for simulations will prove useful in many complex nanoparticle systems as shown similarly for Au nanostars, chiral Au nanorods, and chiral nanoparticle assemblies.…”

Section: ■ Tomography As a Tool Toward Accurate Structural Modelingmentioning

confidence: 99%

“…59 We particularly found this approach beneficial as there is also a need to untangle the chiroptical activity from near-field enhancement emanating from surface-bound chiral growth molecules. 59 We anticipate that the application of tomographic reconstructions to create models for simulations will prove useful in many complex nanoparticle systems as shown similarly for Au nanostars, chiral Au nanorods, and chiral nanoparticle assemblies. 70,72,75,76 ■ CHALLENGE TO THE FIELD: ACCURATE…”

Section: ■ Tomography As a Tool Toward Accurate Structural Modelingmentioning

confidence: 99%

“…(F) Simulated chiral g-factor spectra of the tomographic reconstruction at different orientations (color traces), and the average of all orientations (black). (E, F) Reprinted with permission under a Creative Commons CC-BY License from ref . Published 2022 Royal Society of Chemistry.…”

Section: Structural Considerations For Models In Fdtd Simulationsmentioning

confidence: 99%

See 2 more Smart Citations

Practical Considerations for Simulating the Plasmonic Properties of Metal Nanoparticles

Googasian

Skrabalak

2023

ACS Phys. Chem Au

Self Cite

View full text Add to dashboard Cite

Simulating the plasmonic properties of colloidally derived metal nanoparticles with accuracy to their experimentally observed measurements is challenging due to the many structural and compositional parameters that influence their scattering and absorption properties. Correlation between single nanoparticle scattering measurements and simulated spectra emphasize these strong structural and compositional relationships, providing insight into the design of plasmonic nanoparticles. This Perspective builds from this history to highlight how the structural features of models used in simulation methods such as those based on the Finite-Difference Time-Domain (FDTD) method and Discrete Dipole Approximation (DDA) are of critical consideration for correlation with experiment and ultimately prediction of new nanoparticle properties. High-level characterizations such as electron tomography are discussed as ways to advance the accuracy of models used in such simulations, allowing the plasmonic properties of structurally complex nanoparticles to be better understood. However, we also note that the field is far from bringing experiment and simulation into agreement for plasmonic nanoparticles with complex compositions, reflecting analytical challenges that inhibit accurate model generation. Potential directions for addressing these challenges are also presented.

show abstract

Geometric Control and Optical Properties of Intrinsically Chiral Plasmonic Nanomaterials

Sun,

Tao,

Yang

et al. 2023

Advanced Materials

View full text Add to dashboard Cite

Intrinsically chiral plasmonic nanomaterials exhibit intriguing geometry‐dependent chiroptical properties, which is due to the combination of plasmonic features with geometric chirality. Thus, chiral plasmonic nanomaterials have become promising candidates for applications in biosensing, asymmetric catalysis, biomedicine, photonics, etc. Recent advances in geometric control and optical tuning of intrinsically chiral plasmonic nanomaterials have further opened up a unique opportunity for their widespread applications in many emerging technological areas. Here, we review the recent developments in the geometric control of chiral plasmonic nanomaterials with special attention given to the quantitative understanding of the chiroptical structure‐property relationship. We also discuss several important optical spectroscopic tools for characterizing the optical chirality of plasmonic nanomaterials at both ensemble and single‐particle levels. We further highlight three emerging applications of chiral plasmonic nanomaterials including enantioselective sensing, enantioselective catalysis, and biomedicine. We envision that these advanced studies in chiral plasmonic nanomaterials will pave the way toward the rational design of chiral nanomaterials with desired optical properties for diverse emerging technological applications.This article is protected by copyright. All rights reserved

show abstract

Seed-directed synthesis of chiroptically active Au nanocrystals of varied symmetries

Abstract: Chiral plasmonic nanocrystals with varied symmetries were synthesized by l-glutathione-guided overgrowth from Au tetrahedra, nanoplates, and octahedra, highlighting the importance of chiral molecule adsorption at transient kink sites.

Cited by 9 publications

References 26 publications

Chiral Au Nanorods: Synthesis, Chirality Origin, and Applications

Chiral Au Nanorods: Synthesis, Chirality Origin, and Applications

Practical Considerations for Simulating the Plasmonic Properties of Metal Nanoparticles

Geometric Control and Optical Properties of Intrinsically Chiral Plasmonic Nanomaterials

Contact Info

Product

Resources

About