Chemical vapor deposition of germanium-rich CrGe x nanowires

Vladislav Dřínek; Stanislav Tiagulskyi; Roman Yatskiv; Jan Grym; Radek Fajgar; Věra Jandová; Martin Koštejn; Jaroslav Kupčík

doi:10.3762/bjnano.12.100

Chemical vapor deposition of germanium-rich CrGe _x nanowires

Beilstein J Nanotechnol. 2021 Dec 7:12:1365-1371. doi: 10.3762/bjnano.12.100. eCollection 2021.

Authors

Vladislav Dřínek¹, Stanislav Tiagulskyi², Roman Yatskiv², Jan Grym², Radek Fajgar¹, Věra Jandová¹, Martin Koštejn¹, Jaroslav Kupčík¹

Affiliations

¹ Institute of Chemical Process Fundamentals, Czech Academy of Sciences, Rozvojová 2/135, 165 02 Prague 6, Czech Republic.
² Institute of Photonics and Electronics, Czech Academy of Sciences, Chaberská 1014/57, 182 51 Prague 8, Czech Republic.

Abstract

Chemical vapor deposition was applied to synthetize nanostructured deposits containing several sorts of nanoobjects (i.e., nanoballs, irregular particles, and nanowires). Analytical techniques, that is, high-resolution transmission electron microscopy, scanning electron microscopy, electron dispersive X-ray analysis, selected area electron diffraction, and X-ray photoelectron spectroscopy, showed that unlike nanoballs and particles composed of crystalline germanium, the layer was made of chromium germanide CrGe _x . The nanowires possessed a complex structure, namely a thin crystalline germanium core and amorphous CrGe _x coating. The composition of the nanowire coating was [Cr]/[Ge] = 1:(6-7). The resistance of the nanowire-deposit system was estimated to be 2.7 kΩ·cm using an unique vacuum contacting system.

Keywords: chemical vapor deposition; chromium germanide; nanostructured materials; nanowire; resistivity.

Grants and funding

This research was funded by the Czech Academy of Sciences (grant Strategy AV21 “Nanostructured materials for energy conversion”) and the Grant Agency of the Czech Republic (L200721851) is gratefully acknowledged.