Near-field infrared microscopy of nanometer-sized nickel clusters inside single-walled carbon nanotubes

Nickel nanoclusters grown inside single-walled carbon nanotubes (SWCNT) were studied by infrared scattering-type scanning near-field optical microscopy (s-SNOM). The metal clusters give high local contrast enhancement in near-field phase maps caused by the excitation of free charge carriers. The exp...

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Autores principales: Németh, Gergely, Datz, Dániel, Pekker, Áron, Saito, Takeshi, Domanov, Oleg, Shiozawa, Hidetsugu, Lenk, Sándor, Pécz, Béla, Koppa, Pál, Kamarás, Katalin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2019
Materias:
Chemistry
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9073632/
https://www.ncbi.nlm.nih.gov/pubmed/35529972
http://dx.doi.org/10.1039/c9ra07089c
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author Németh, Gergely
Datz, Dániel
Pekker, Áron
Saito, Takeshi
Domanov, Oleg
Shiozawa, Hidetsugu
Lenk, Sándor
Pécz, Béla
Koppa, Pál
Kamarás, Katalin
author_facet Németh, Gergely
Datz, Dániel
Pekker, Áron
Saito, Takeshi
Domanov, Oleg
Shiozawa, Hidetsugu
Lenk, Sándor
Pécz, Béla
Koppa, Pál
Kamarás, Katalin
author_sort Németh, Gergely
collection PubMed
description Nickel nanoclusters grown inside single-walled carbon nanotubes (SWCNT) were studied by infrared scattering-type scanning near-field optical microscopy (s-SNOM). The metal clusters give high local contrast enhancement in near-field phase maps caused by the excitation of free charge carriers. The experimental results are supported by calculations using the finite dipole model, approximating the clusters with elliptical nanoparticles. Compared to magnetic force microscopy, s-SNOM appears much more sensitive to detect metal clusters inside carbon nanotubes. We estimate that these clusters contain fewer than ≈700 Ni atoms.
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spelling pubmed-90736322022-05-06 Near-field infrared microscopy of nanometer-sized nickel clusters inside single-walled carbon nanotubes Németh, Gergely Datz, Dániel Pekker, Áron Saito, Takeshi Domanov, Oleg Shiozawa, Hidetsugu Lenk, Sándor Pécz, Béla Koppa, Pál Kamarás, Katalin RSC Adv Chemistry Nickel nanoclusters grown inside single-walled carbon nanotubes (SWCNT) were studied by infrared scattering-type scanning near-field optical microscopy (s-SNOM). The metal clusters give high local contrast enhancement in near-field phase maps caused by the excitation of free charge carriers. The experimental results are supported by calculations using the finite dipole model, approximating the clusters with elliptical nanoparticles. Compared to magnetic force microscopy, s-SNOM appears much more sensitive to detect metal clusters inside carbon nanotubes. We estimate that these clusters contain fewer than ≈700 Ni atoms. The Royal Society of Chemistry 2019-10-23 /pmc/articles/PMC9073632/ /pubmed/35529972 http://dx.doi.org/10.1039/c9ra07089c Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by/3.0/
spellingShingle Chemistry
Németh, Gergely
Datz, Dániel
Pekker, Áron
Saito, Takeshi
Domanov, Oleg
Shiozawa, Hidetsugu
Lenk, Sándor
Pécz, Béla
Koppa, Pál
Kamarás, Katalin
Near-field infrared microscopy of nanometer-sized nickel clusters inside single-walled carbon nanotubes
title Near-field infrared microscopy of nanometer-sized nickel clusters inside single-walled carbon nanotubes
title_full Near-field infrared microscopy of nanometer-sized nickel clusters inside single-walled carbon nanotubes
title_fullStr Near-field infrared microscopy of nanometer-sized nickel clusters inside single-walled carbon nanotubes
title_full_unstemmed Near-field infrared microscopy of nanometer-sized nickel clusters inside single-walled carbon nanotubes
title_short Near-field infrared microscopy of nanometer-sized nickel clusters inside single-walled carbon nanotubes
title_sort near-field infrared microscopy of nanometer-sized nickel clusters inside single-walled carbon nanotubes
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9073632/
https://www.ncbi.nlm.nih.gov/pubmed/35529972
http://dx.doi.org/10.1039/c9ra07089c
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