Applied Physics B

, Volume 108, Issue 3, pp 641–647 | Cite as

Optical properties of free sub-10-nm diameter Fe2O3 nanoparticles studied by broad-band cavity enhanced absorption spectroscopy (BB-CEAS)

  • J. Meinen
  • M. Eritt
  • J. C. Habig
  • T. Leisner


We present direct optical extinction measurements on free size filtered iron oxide nanoparticles in the size range between 3 nm and 10 nm diameter. The high number density of nanoparticles required for the cavity enhanced absorption spectroscopy (CEAS) measurements was achieved by combining a high intensity plasma synthesis source of iron oxide particles with an aerodynamic lens inlet into the vacuum system and radiofrequency particle guiding and storage devices. The extinction cross sections can be quantitatively explained using the bulk optical constants of hematite, which may exist in the form of nanoparticles in the mesosphere.


Light Emit Diode Fe2O3 Nanoparticles Particle Number Density Fe2O3 Particle Extinction Cross Section 
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The authors thank U. Platt, A. Terasaki, M. Rapp, and E. Rühl for valuable discussions. The work was funded by the German BMBF in the framework of the FSP 301, grants 05K10VH3 and 05KS7VHA.


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Copyright information

© Springer-Verlag 2012

Authors and Affiliations

  • J. Meinen
    • 1
  • M. Eritt
    • 2
  • J. C. Habig
    • 1
    • 2
  • T. Leisner
    • 1
    • 2
  1. 1.Karlsruhe Institute of TechnologyInstitute for Meteorology and Climate Research—Atmospheric Aerosol ResearchEggenstein-LeopoldshafenGermany
  2. 2.Institute of Environmental PhysicsUniversity of HeidelbergHeidelbergGermany

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