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Electron diffraction patterns from scroll nanotubes: interpretation peculiarities
Author(s) -
Khalitov Zufar,
Khadiev Azat,
Pashin Dmitry
Publication year - 2015
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s1600576714024005
Subject(s) - diffraction , electron diffraction , scroll , materials science , context (archaeology) , equidistant , conical surface , optics , physics , crystallography , molecular physics , chemistry , geometry , mathematics , composite material , paleontology , archaeology , biology , history
This article describes the structure of scroll nanotubes and associated diffraction effects in the context of electron diffraction from a single nanotube. It is suggested that the effect of multiple equidistant splitting of diffuse reflections into cone series be used as a diffraction criterion for conical scroll structure identification. For cylindrical scroll structure determination, the effect of the azimuthal dependence of the intensity of basal diffraction spots is proposed as a characteristic sign. Good agreement between specific oscillations in both theoretical and experimental profiles of basal diffraction spots was achieved. It was also established that there are special values of chiral angles in cylindrical scroll nanotubes that lead to order enhancement in their structure along the tube axis, whereas even a small deviation from these angles results in degradation of diffraction conditions for some diffraction spots in the diffraction pattern.