Amplification of Photochemical Chiroptical Activity of Chiral Gold Nanocubes

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F25%3A00637254" target="_blank" >RIV/61388955:_____/25:00637254 - isvavai.cz</a>

Výsledek na webu

<a href="https://hdl.handle.net/11104/0368170" target="_blank" >https://hdl.handle.net/11104/0368170</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/smll.202505093" target="_blank" >10.1002/smll.202505093</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Amplification of Photochemical Chiroptical Activity of Chiral Gold Nanocubes

Popis výsledku v původním jazyce

Chiral plasmonic nanostructures enable exceptionally high dissymmetry factors (g-factors) compared to chiral molecules and present unparalleled opportunities in light manipulation, polarization-sensitive photochemistry, and chiral sensing. Here polarization-dependent plasmonic chemistry on chiral gold nanocubes (AuNCs) is presented, leveraging the high sensitivity of surface-enhanced Raman scattering (SERS). The AuNCs exhibit strong optical activity and localized surface plasmon resonances acting as highly efficient nanoscale light antennae. Employing the hot electron-induced dehalogenation of 8-Bromoadenine as a model reaction, it is demonstrated that circularly polarized light induces asymmetric reaction rates due to circular dichroism (CD) in hot electron generation efficiency. Astonishingly, the photochemical g-factor, quantified by the differential reaction rate coefficients under left-handed and right-handed circularly polarized light, surpasses its optical counterpart and can be further enhanced by laser intensity. Remarkably, multilayer assemblies of AuNCs exhibit a reversal in photochemical CD, which is tuneable via laser power and enables further g-factor enhancement. Comprehensive electromagnetic simulations of extinction spectra and hot electron generation maps corroborate the profound impact of particle arrangement on the optical g-factor and the g-factor for hot-electron generation. This work demonstrates a systematic approach to enhance the photochemical chiroptical response of chiral AuNCs, paving the way for extraordinary control over chemical reactions with light.

Název v anglickém jazyce

Amplification of Photochemical Chiroptical Activity of Chiral Gold Nanocubes

Popis výsledku anglicky

Chiral plasmonic nanostructures enable exceptionally high dissymmetry factors (g-factors) compared to chiral molecules and present unparalleled opportunities in light manipulation, polarization-sensitive photochemistry, and chiral sensing. Here polarization-dependent plasmonic chemistry on chiral gold nanocubes (AuNCs) is presented, leveraging the high sensitivity of surface-enhanced Raman scattering (SERS). The AuNCs exhibit strong optical activity and localized surface plasmon resonances acting as highly efficient nanoscale light antennae. Employing the hot electron-induced dehalogenation of 8-Bromoadenine as a model reaction, it is demonstrated that circularly polarized light induces asymmetric reaction rates due to circular dichroism (CD) in hot electron generation efficiency. Astonishingly, the photochemical g-factor, quantified by the differential reaction rate coefficients under left-handed and right-handed circularly polarized light, surpasses its optical counterpart and can be further enhanced by laser intensity. Remarkably, multilayer assemblies of AuNCs exhibit a reversal in photochemical CD, which is tuneable via laser power and enables further g-factor enhancement. Comprehensive electromagnetic simulations of extinction spectra and hot electron generation maps corroborate the profound impact of particle arrangement on the optical g-factor and the g-factor for hot-electron generation. This work demonstrates a systematic approach to enhance the photochemical chiroptical response of chiral AuNCs, paving the way for extraordinary control over chemical reactions with light.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

<a href="/cs/project/EH22_008%2F0004649" target="_blank" >EH22_008/0004649: Kvantové inženýrství a nanotechnologie</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Small

ISSN

1613-6810

e-ISSN

1613-6829

Svazek periodika

21

Číslo periodika v rámci svazku

36

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

12

Strana od-do

2505093

Kód UT WoS článku

001512805800001

EID výsledku v databázi Scopus

2-s2.0-105008759502