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@ARTICLE{Camara:904160,
author = {Camara, Osmane and Mir, A. H. and Greaves, G. and Donnelly,
S. E. and Hinks, J. A.},
title = {{A}nomalous nucleation of crystals within amorphous
germanium nanowires during thermal annealing},
journal = {Nanotechnology},
volume = {32},
number = {28},
issn = {0957-4484},
address = {Bristol},
publisher = {IOP Publ.},
reportid = {FZJ-2021-05730},
pages = {285707 -},
year = {2021},
abstract = {In this work, germanium nanowires rendered fully amorphous
via xenon ion irradiation have been annealed within a
transmission electron microscope to induce crystallization.
During annealing crystallites appeared in some nanowires
whilst others remained fully amorphous. Remarkably, even
when nucleation occurred, large sections of the nanowires
remained amorphous even though the few crystallites embedded
in the amorphous phase were formed at a minimum of 200 °C
above the temperature for epitaxial growth and 100 °C above
the temperature for random nucleation and growth in bulk
germanium. Furthermore, the presence of crystallites was
observed to depend on the diameter of the nanowire. Indeed,
the formation of crystallites occurred at a higher annealing
temperature in thin nanowires compared with thicker ones.
Additionally, nanowires with a diameter above 55 nm were
made entirely crystalline when the annealing was performed
at the temperature normally required for crystallization in
germanium (i.e. 500 °C). It is proposed that oxygen atoms
hinder both the formation and the growth of crystallites.
Furthermore, as crystallites must reach a minimum size to
survive and grow within the amorphous nanowires, the
instability of crystallites may also play a limited role for
the thinnest nanowires.},
cin = {IEK-9},
ddc = {530},
cid = {I:(DE-Juel1)IEK-9-20110218},
pnm = {1223 - Batteries in Application (POF4-122)},
pid = {G:(DE-HGF)POF4-1223},
typ = {PUB:(DE-HGF)16},
pubmed = {33254162},
UT = {WOS:000644152700001},
doi = {10.1088/1361-6528/abcef1},
url = {https://juser.fz-juelich.de/record/904160},
}