Nanoscale X-ray investigation of magnetic metallofullerene peapods

Research output: Contribution to journalArticle


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@C80 bulk sample and a macroscopic assembly of filled CNTs indicates 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 characterization of low concentrations of lanthanide ions embedded in molecular nanostructures.


  • Fabian Fritz
  • Rasmus Westerström
  • Aram Kostanyan
  • Christin Schlesier
  • Jan Dreiser
  • Benjamin Watts
  • Lothar Houben
  • Martina Luysberg
  • Stanislav M Advoshenko
  • Alexey Popov
  • Claus M Schneider
  • Carola Meyer
External organisations
  • University of Osnabrück
  • Jülich Research Centre
  • University of Zurich
  • Paul Scherrer Institute
  • Leibniz Institute for Solid State and Materials Research
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Nano Technology
Original languageEnglish
Article number435703
Issue number43
Publication statusPublished - 2017
Publication categoryResearch