Controlling Optically Driven Atomic Migration Using Crystal-Facet Control in Plasmonic Nanocavities.
SERS
atomic hopping
crystal facet
nano-optics
nanocavity
picocavity
single-molecule
Journal
ACS nano
ISSN: 1936-086X
Titre abrégé: ACS Nano
Pays: United States
ID NLM: 101313589
Informations de publication
Date de publication:
25 Aug 2020
25 Aug 2020
Historique:
pubmed:
21
7
2020
medline:
21
7
2020
entrez:
21
7
2020
Statut:
ppublish
Résumé
Plasmonic nanoconstructs are widely exploited to confine light for applications ranging from quantum emitters to medical imaging and biosensing. However, accessing extreme near-field confinement using the surfaces of metallic nanoparticles often induces permanent structural changes from light, even at low intensities. Here, we report a robust and simple technique to exploit crystal facets and their atomic boundaries to prevent the hopping of atoms along and between facet planes. Avoiding X-ray or electron microscopy techniques that perturb these atomic restructurings, we use elastic and inelastic light scattering to resolve the influence of crystal habit. A clear increase in stability is found for {100} facets with steep inter-facet angles, compared to multiple atomic steps and shallow facet curvature on spherical nanoparticles. Avoiding atomic hopping allows Raman scattering on molecules with low Raman cross-section while circumventing effects of charging and adatom binding, even over long measurement times. These nanoconstructs allow the optical probing of dynamic reconstruction in nanoscale surface science, photocatalysis, and molecular electronics.
Identifiants
pubmed: 32687323
doi: 10.1021/acsnano.0c04600
pmc: PMC7458481
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
10562-10568Références
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