6533b82efe1ef96bd129458a
RESEARCH PRODUCT
Size-dependent alignment of Fe nanoparticles upon deposition onto W(110)
A VoitkansA VoitkansArmin KleibertArmin KleibertKarl-heinz Meiwes-broersubject
CrystallographyNanostructureReflection high-energy electron diffractionMaterials scienceElectron diffractionAtomNanoparticleSubstrate (electronics)DislocationCondensed Matter PhysicsElectronic Optical and Magnetic MaterialsElectron backscatter diffractiondescription
Using in situ electron diffraction we study the orientation of mass-selected iron nanoparticles upon deposition onto single crystalline W(110) at room temperature. It is found that particles with a diameter below about 4 nm and a kinetic energy $\ensuremath{\le}0.1$ electron volt per atom spontaneously align with respect to the substrate. Larger particles preferentially rest with their (001) and (110) facets parallel to the surface, but do not show further alignment. The data may hint at thermally activated dislocation motions upon the impact on the substrate which are responsible for the observed orientation below 4 nm. By this uniformly oriented monodisperse nanostructures can be prepared on single-crystalline substrates.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2010-02-26 | Physical Review B |