Journal
RSC ADVANCES
Volume 9, Issue 59, Pages 34120-34124Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9ra07089c
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Funding
- Hungarian National Research Fund (OTKA) [SNN 118012]
- Austrian Science Fund (FWF) [P30431-N36]
- Janos Bolyai Fellowship of the Hungarian Academy of Sciences
- National Research, Development and Innovation Office - NKFIH [PD 121320, FK-125063]
- [VEKOP-2.3.3-15-2016-00002]
- Austrian Science Fund (FWF) [P30431] Funding Source: Austrian Science Fund (FWF)
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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 approximate to 700 Ni atoms.
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