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

Autor:	Németh G; Institute for Solid State Physics and Optics, Wigner Research Centre for Physics, Hungarian Academy of Sciences Konkoly-Thege M. u. 29-33 H-1121 Budapest Hungary nemeth.gergely@wigner.mta.hu., Datz D; Institute for Solid State Physics and Optics, Wigner Research Centre for Physics, Hungarian Academy of Sciences Konkoly-Thege M. u. 29-33 H-1121 Budapest Hungary nemeth.gergely@wigner.mta.hu., Pekker Á; Institute for Solid State Physics and Optics, Wigner Research Centre for Physics, Hungarian Academy of Sciences Konkoly-Thege M. u. 29-33 H-1121 Budapest Hungary nemeth.gergely@wigner.mta.hu., Saito T; Nanomaterials Research Institute, AIST 1-1-1 Higashi Tsukuba 305-8565 Japan., Domanov O; Faculty of Physics, University of Vienna Boltzmanngasse 5 A-1090 Vienna Austria., Shiozawa H; Faculty of Physics, University of Vienna Boltzmanngasse 5 A-1090 Vienna Austria.; J. Heyrovsky Institute of Physical Chemistry, Academy of Sciences of the Czech Republic Dolejskova 3 CZ-182 23 Prague 8 Czech Republic., Lenk S; Department of Atomic Physics, Budapest University of Technology and Economics Budafoki út 8 H-1111 Budapest Hungary., Pécz B; Institute for Technical Physics and Materials Science, Centre for Energy Research, Hungarian Academy of Sciences Konkoly-Thege M. u. 29-33 H-1121 Budapest Hungary., Koppa P; Department of Atomic Physics, Budapest University of Technology and Economics Budafoki út 8 H-1111 Budapest Hungary., Kamarás K; Institute for Solid State Physics and Optics, Wigner Research Centre for Physics, Hungarian Academy of Sciences Konkoly-Thege M. u. 29-33 H-1121 Budapest Hungary nemeth.gergely@wigner.mta.hu.
Jazyk:	angličtina
Zdroj:	RSC advances [RSC Adv] 2019 Oct 23; Vol. 9 (59), pp. 34120-34124. Date of Electronic Publication: 2019 Oct 23 (Print Publication: 2019).
DOI:	10.1039/c9ra07089c
Abstrakt:	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. Competing Interests: There are no conflicts to declare. (This journal is © The Royal Society of Chemistry.)
Databáze:	MEDLINE
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