Publications Repository - Helmholtz-Zentrum Dresden-Rossendorf

1 Publication
Growth and Taming of Nanostructures with Ion Beams
Heinig, K.-H.;
Nanocluster ensembles and nanowires can be synthesised in surface layers of various substrates by high dose ion implantation. A detailed understanding of the complex processes like ion deposition and subsequent phase separation has been achieved by atomistic computer simulations. This understanding helps to tailor nanostructures for applications. Examples are the synthesis of very narrow Si nanocluster layers in SiO2 for nanodot memories and of ion-beam-shaped metallic nanorods for photonics. Recently it has been demonstrated that ion beams can be also used to change properties of nanostructures drastically. Thus, at elevated temperatures, irradiation of nanocluster ensembles results in a narrowing of the size distribution, which can be described as “inverse Ostwald ripening”. Irradiation of single-crystalline but chemically disordered nanostructures assists chemical ordering of alloys like FePt, which has a very high magnetic anisotropy and is, therefore, a favorite material for future magnetic recording.
Keywords: Nanostructures, ion beam synthesis, inverse Ostwald ripening, nanowires, atomistic computer simulation
  • Lecture (others)
    Seminar at the RWTH, 26.01.2006, Aachen, Germany

Publ.-Id: 8248