Borschel, Christian; Niepelt, Raphael; Geburt, Sebastian; Gutsche, Christoph; Regolin, Ingo; Prost, Werner; Tegude, Franz-Josef; Stichtenoth, Daniel; Schwen, Daniel; Ronning, Carsten:

Alignment of Semiconductor Nanowires Using Ion Beams

In: SMALL, Jg. 2009 / small 5 (2009) ; no. 22, S. 2576 - 2580
ISSN: 1613-6829
Zeitschriftenaufsatz / Fach: Elektrotechnik
Abstract:
Gallium arsenide nanowires are grown on < 100 > GaAs substrates, adopting the epitaxial relation and thus growing with an angle around 35 degrees off the substrate surface. These straight nanowires are irradiated with different kinds of energetic ions. Depending on the ion  species and energy, downwards or upwards bending of the nanowires is observed to increase with ion fluence. In the case of upwards bending, the nanowires can be aligned towards the ion beam direction at high fluences. Defect formation (vacancies and interstitials) within the  implantation cascade is identified as the key mechanism for bending. Monte Carlo simulations of the implantation are presented to substantiate the results.