Imperial College London
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ProfessorEmilianoCortes

Faculty of Engineering, Department of Materials

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e.cortes

 
 
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Location

 

Blackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Stefancu:2022:10.1021/acsphotonics.1c01714,
author = {Stefancu, A and Biro, OM and Todor-Boer, O and Botiz, I and Cortés, E and Leopold, N},
doi = {10.1021/acsphotonics.1c01714},
journal = {ACS Photonics},
pages = {895--904},
title = {Halide-metal complexes at plasmonic interfaces create new decay pathways for plasmons and excited molecules},
url = {http://dx.doi.org/10.1021/acsphotonics.1c01714},
volume = {9},
year = {2022}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - We show that by modifying the chemical interface of silver nanoparticles (AgNPs) with halide ions, it is possible to tune the total decay rate of adsorbed excited molecules and the plasmon damping rate. Through single-molecule surface-enhanced Raman scattering and surface-enhanced fluorescence enhancement factors of crystal violet (CV) and rhodamine 6G (R6G), we show that I–-modified AgNPs (AgNPs@I) and Br–-modified AgNPs (AgNPs@Br) lead to an increase in the total decay rate of excited CV and R6G by a factor between ∼1.6–2.6, compared to Cl–-modified AgNPs (AgNPs@Cl). In addition, we found that the chemical interface damping, which characterizes the plasmon resonance decay into surface states, is stronger on AgNPs@I and AgNPs@Br when compared to AgNPs@Cl. These results point toward the formation of metal–halide surface complexes. These new interfacial states can accept electrons from both excited molecular orbitals and surface plasmon excitations, completely altering the electronic dynamics and reactivity of plasmonic interfaces.
AU  - Stefancu,A
AU  - Biro,OM
AU  - Todor-Boer,O
AU  - Botiz,I
AU  - Cortés,E
AU  - Leopold,N
DO  - 10.1021/acsphotonics.1c01714
EP  - 904
PY  - 2022///
SN  - 2330-4022
SP  - 895
TI  - Halide-metal complexes at plasmonic interfaces create new decay pathways for plasmons and excited molecules
T2  - ACS Photonics
UR  - http://dx.doi.org/10.1021/acsphotonics.1c01714
UR  - https://pubs.acs.org/doi/10.1021/acsphotonics.1c01714
UR  - http://hdl.handle.net/10044/1/95203
VL  - 9
ER  -
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