Amplification of Photochemical Chiroptical Activity of Chiral Gold Nanocubes
The result's identifiers
Result code in 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>
Result on the web
<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>
Alternative languages
Result language
angličtina
Original language name
Amplification of Photochemical Chiroptical Activity of Chiral Gold Nanocubes
Original language description
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.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10403 - Physical chemistry
Result continuities
Project
<a href="/en/project/EH22_008%2F0004649" target="_blank" >EH22_008/0004649: Quantum Engineering and Nanotechnology</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Small
ISSN
1613-6810
e-ISSN
1613-6829
Volume of the periodical
21
Issue of the periodical within the volume
36
Country of publishing house
US - UNITED STATES
Number of pages
12
Pages from-to
2505093
UT code for WoS article
001512805800001
EID of the result in the Scopus database
2-s2.0-105008759502