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Radial superlattices and single nanoreactors

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Deneke,  Ch.
Former Scientific Facilities, Max Planck Institute for Solid State Research, Max Planck Society;
Abteilung v. Klitzing, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

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Jin-Phillipp,  N. Y.
Department Physical Chemistry of Solids (Joachim Maier), Max Planck Institute for Solid State Research, Max Planck Society;

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Loa,  I.
Former Scientific Facilities, Max Planck Institute for Solid State Research, Max Planck Society;

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Schmidt,  O. G.
Former Scientific Facilities, Max Planck Institute for Solid State Research, Max Planck Society;
Scientific Facility Nanostructuring Lab (Jürgen Weis), Max Planck Institute for Solid State Research, Max Planck Society;
Abteilung v. Klitzing, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;
Department Nanoscale Science (Klaus Kern), Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Deneke, C., Jin-Phillipp, N. Y., Loa, I., & Schmidt, O. G. (2004). Radial superlattices and single nanoreactors. Applied Physics Letters, 84(22), 4475-4477.


Cite as: https://hdl.handle.net/21.11116/0000-000E-F65B-7
Abstract
We investigate the wall structure and thermal stability of individual
freestanding rolled-up nanotubes (RUNTs) using micro-Raman
spectroscopy, transmission electron microscopy, and selected area
electron diffraction. Our studies reveal that the walls of the
InAs/GaAs RUNTs consist of a radial superlattice comprising alternating
crystalline and noncrystalline layers. Furthermore, we locally heated
individual RUNTs with a laser beam, and Raman spectroscopy was used in
situ to monitor any structural changes. At about 300 degreesC the
heated part of a RUNT starts to oxidize and eventually transforms into
crystalline beta-Ga2O3. This result shows that RUNTs can serve as
nanoreactors that locally synthesize material at intentional places on
a substrate surface. (C) 2004 American Institute of Physics.