Radial Growth of Self-Catalyzed GaAs Nanowires and the Evolution of the Liquid Ga-Droplet Studied by Time-Resolved in Situ X-ray Diffraction.
We report on a growth study of self-catalyzed GaAs nanowires based on time-resolved in situ X-ray structure characterization during molecular-beam-epitaxy in combination with ex situ scanning-electron-microscopy. We reveal the evolution of nanowire radius and polytypism and distinguish radial growth processes responsible for tapering and side-wall growth. We interpret our results using a model for diameter self-stabilization processes during growth of self-catalyzed GaAs nanowires including the shape of the liquid Ga-droplet and its evolution during growth.
['Schroth|Philipp|P|0000-0002-5016-9520', 'Jakob|Julian|J|', 'Feigl|Ludwig|L|', 'Mostafavi Kashani|Seyed Mohammad|SM|', 'Vogel|Jonas|J|', 'Strempfer|Jörg|J|', 'Keller|Thomas F|TF|', 'Pietsch|Ullrich|U|', 'Baumbach|Tilo|T|']
growth self-catalyzed Nanowires in situ X-ray diffraction polytypism tapering molecular beam epitaxy