Spatially resolved Raman spectroscopy on indium-catalyzed core-shell germanium nanowires: size effects

The structure of indium-catalyzed germanium nanowires is investigated by atomic force microscopy, scanning confocal Raman spectroscopy and transmission electron microscopy. The nanowires are formed by a crystalline core and an amorphous shell. We find that the diameter of the crystalline core varies along the nanowire, down to few nanometers. Phonon confinement effects are observed in the regions where the crystalline region is the thinnest. The results are consistent with the thermally insulating behavior of the core-shell nanowires.


Published in:
Nanotechnology, 21, -
Year:
2010
Publisher:
Institute of Physics
ISSN:
0957-4484
Keywords:
Laboratories:




 Record created 2011-12-16, last modified 2018-01-28

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