Asymmetrical Plasmon Distribution in Hybrid AuAg Hollow/Solid Coded Nanotubes
Genç, Aziz (Institut Català de Nanociència i Nanotecnologia)
Patarroyo, Javier (Institut Català de Nanociència i Nanotecnologia)
Sancho-Parramon, Jordi (Rudjer Boskovic Institute)
Arenal, Raúl (ARAID Foundation)
Bastús, Neus G (Institut Català de Nanociència i Nanotecnologia)
Puntes, Víctor (Hospital Universitari Vall d'Hebron. Institut de Recerca)
Arbiol i Cobos, Jordi (Institut Català de Nanociència i Nanotecnologia)

Date:	2023
Abstract:	Morphological control at the nanoscale paves the way to fabricate nanostructures with desired plasmonic properties. In this study, we discuss the nanoengineering of plasmon resonances in 1D hollow nanostructures of two different AuAg nanotubes, including completely hollow nanotubes and hybrid nanotubes with solid Ag and hollow AuAg segments. Spatially resolved plasmon mapping by electron energy loss spectroscopy (EELS) revealed the presence of high order resonator-like modes and localized surface plasmon resonance (LSPR) modes in both nanotubes. The experimental findings accurately correlated with the boundary element method (BEM) simulations. Both experiments and simulations revealed that the plasmon resonances are intensely present inside the nanotubes due to plasmon hybridization. Based on the experimental and simulated results, we show that the novel hybrid AuAg nanotubes possess two significant coexisting features: (i) LSPRs are distinctively generated from the hollow and solid parts of the hybrid AuAg nanotube, which creates a way to control a broad range of plasmon resonances with one single nanostructure, and (ii) the periodicity of the high-order modes are disrupted due to the plasmon hybridization by the interaction of solid and hollow parts, resulting in an asymmetrical plasmon distribution in 1D nanostructures. The asymmetry could be modulated/engineered to control the coded plasmonic nanotubes.
Grants:	Agència de Gestió d'Ajuts Universitaris i de Recerca 2021/SGR-00457 Agencia Estatal de Investigación PID2020-116093RB-C43 Ministerio de Ciencia e Innovación CEX2021-001214-S Ministerio de Ciencia e Innovación PID2019-104739GB-100 European Commission 823717 Agencia Estatal de Investigación RTI2018-099965-B-I00
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Plasmon coded ; Nanotubes ; Nanowires ; Asymmetrical distribution ; Metal nanotubes ; Electron energy-loss spectroscopy ; AuAg ; Localized surface plasmon resonances ; Boundary element method
Published in:	Nanomaterials, Vol. 13, Issue 6 (March 2023) , art. 992, ISSN 2079-4991

DOI: 10.3390/nano13060992
PMID: 36985887

12 p, 2.5 MB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
Articles > Research articles
Articles > Published articles