Open AccessAzimuthal‐rotation sample holder for molecular orientation analysis
Author(s) -
Harano Takayuki,
Takeichi Yasuo,
Ohigashi Takuji,
Shindo Daisuke,
Nemoto Eiji,
Wakabayashi Daisuke,
Yamashita Shohei,
Murao Reiko,
Kimura Masao
Publication year - 2020
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s160057752000990x
Subject(s) - orientation (vector space) , azimuth , rotation (mathematics) , sample (material) , geometry , geodesy , geology , physics , mathematics , thermodynamics
In this study, an azimuthal‐rotation sample holder compatible with scanning transmission X‐ray microscopy was developed. This holder exhibits improvement in the accuracy of rotation angles and reduces the displacement of the rotation axes during azimuthal rotation by using a crossed roller bearing. To evaluate the performance of the holder, the authors investigated the dependence of the optical density around the C K ‐edge absorption of π‐orbital‐oriented domains in natural spherical graphite on the rotational angle by using linearly horizontally and vertically polarized undulator radiation. Based on the dependence of the optical density ratio between C 1 s → π* and 1 s → σ* excitation on the polarization angle of the X‐rays, the average two‐dimensional orientation angle of the π orbital in each position in a natural spherical graphite sample was visualized.