Nanoscale x-ray investigation of magnetic metallofullerene peapods

Autor(en): Fritz, Fabian 
Westerstrom, Rasmus 
Kostanyan, Aram 
Schlesier, Christin 
Dreiser, Jan 
Watts, Benjamin 
Houben, Lothar 
Luysberg, Martina 
Avdoshenko, Stanislav M. 
Popov, Alexey A. 
Schneider, Claus M.
Meyer, Carola 
Stichwörter: CARBON NANOTUBES; CIRCULAR-DICHROISM; CNT; endohedral fullerenes; FIELD; FULLERENES; HRTEM; Materials Science; Materials Science, Multidisciplinary; Nanoscience & Nanotechnology; Physics; Physics, Applied; Science & Technology - Other Topics; SPECTROSCOPY; STXM; XMCD
Erscheinungsdatum: 2017
Volumen: 28
Ausgabe: 43
Endohedral lanthanide ions packed inside carbon nanotubes (CNTs) in a one-dimensional assembly have been studied with a combination of high resolution transmission electron microscopy (HRTEM), scanning transmission x-ray microscopy (STXM), and x-ray magnetic circular dichroism (XMCD). By correlating HRTEM and STXM images we show that structures down to 30 nm are resolved with chemical contrast and record x-ray absorption spectra from endohedral lanthanide ions embedded in individual nanoscale CNT bundles. XMCD measurements of an Er3N@C-80 bulk sample and a macroscopic assembly of filled CNTs indicate that the magnetic properties of the endohedral Er3+ ions are unchanged when encapsulated in CNTs. This study demonstrates the feasibility of local magnetic x-ray characterisation of low concentrations of lanthanide ions embedded in molecular nanostructures.
ISSN: 09574484
DOI: 10.1088/1361-6528/aa8b4c

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