Size and structure of nanoparticles formed via ultraviolet photolysis of ferrocene

K. Elihn, L. Landström, O. Alm, M. Boman, P. Heszler

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Iron nanoparticles enclosed in carbon shells were formed by laser-assisted chemical vapor decomposition of ferrocene (Fe (C5 H5) 2) vapor in Ar gas atmosphere. The particle size dependence on the total ambient gas pressure and on laser fluence of the pulsed ArF excimer laser was examined and, e.g., an effective size decrease of the iron core was observed at elevated laser fluences. Characterizations of the iron and carbon microstructures were performed by x-ray diffraction and transmission electron microscopy, while relative iron deposition rates were measured by x-ray fluorescence spectroscopy. Both α-Fe and γ-Fe phases were found for the single crystalline iron cores, surrounded by graphitic (inner) and amorphous (outer) carbon layers. The temperature rise of the laser-excited particles was also determined by optical spectroscopy of the emitted thermal radiation, which allowed an estimation of the iron loss of the nanoparticles due to evaporation. The estimated and measured iron losses are in good agreement.

Original languageEnglish
Article number034311
JournalJournal of Applied Physics
Issue number3
Publication statusPublished - Feb 28 2007

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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