Research Paper

Journal of Nanoparticle Research

, 15:1878

Direct gas-phase synthesis of single-phase β-FeSi2 nanoparticles

  • Robert BywalezAffiliated withIVG, Institute for Combustion and Gas Dynamics – Reactive Fluids, University of Duisburg-Essen Email author 
  • , Hans OrthnerAffiliated withIVG, Institute for Combustion and Gas Dynamics – Reactive Fluids, University of Duisburg-Essen
  • , Ervin MehmedovicAffiliated withIVG, Institute for Combustion and Gas Dynamics – Reactive Fluids, University of Duisburg-Essen
  • , Robert ImlauAffiliated withErnst Ruska-Centre for Microscopy and Spectroscopy with Electrons and Peter Grünberg Institute 5, Forschungszentrum Jülich
  • , Andras KovacsAffiliated withErnst Ruska-Centre for Microscopy and Spectroscopy with Electrons and Peter Grünberg Institute 5, Forschungszentrum Jülich
  • , Martina LuysbergAffiliated withErnst Ruska-Centre for Microscopy and Spectroscopy with Electrons and Peter Grünberg Institute 5, Forschungszentrum Jülich
  • , Hartmut WiggersAffiliated withIVG, Institute for Combustion and Gas Dynamics – Reactive Fluids, University of Duisburg-EssenCENIDE, Center for Nanointegration Duisburg-Essen

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Abstract

For the first time, phase-pure β-FeSi2 nanoparticles were successfully produced by gas-phase synthesis. We present a method to fabricate larger quantities of semiconducting β-FeSi2 nanoparticles, with crystallite sizes between 10 and 30 nm, for solar and thermoelectric applications utilizing a hot-wall reactor. A general outline for the production of those particles by thermal decomposition of silane and iron pentacarbonyl is provided based on kinetic data. The synthesized particles are investigated by X-ray diffraction and transmission electron microscopy, providing evidence that the as-prepared materials are indeed β-FeSi2, while revealing morphological characteristics inherent to the nanoparticles created.

Keywords

Gas-phase synthesis Nanoparticles β-iron disilicide Semiconductor