Mössbauer spectroscopy investigation of magnetic nanoparticles incorporated into carbon nanotubes obtained by the injection CVD method

• Published in: Semiconductor Physics Quantum Electronics & Optoelectronics
• Date: 2010
• Main Authors: Prudnikava, A.L., Fedotova, J.A., Kasiuk, J.V., Shulitski, B.G., Labunov, V.A.
• Format: Article
• Language: English
• Published: Інститут фізики напівпровідників імені В.Є. Лашкарьова НАН України 2010
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/118208
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: Mössbauer spectroscopy investigation of magnetic
 nanoparticles incorporated into carbon nanotubes obtained
 by the injection CVD method/ A.L. Prudnikava, J.A. Fedotova, J.V. Kasiuk, B.G. Shulitski, V.A. Labunov // Semiconductor Physics Quantum Electronics & Optoelectronics. — 2010. — Т. 13, № 2. — С. 125-131. — Бібліогр.: 23 назв. — англ.

This paper is devoted to the investigation of phase composition of the
 magnetic filler located inside multi-wall carbon nanotubes (CNTs) using Mössbauer
 spectroscopy, scanning electron microscopy (SEM) and transmission electron
 microscopy (TEM). CNTs were obtained by the injection CVD method using ferrocenexylene
 solution under various conditions (i.e., the ferrocene concentration cx (1%, 5%,
 and 10%), slow or fast cooling down rates of the synthesis reactor, temperature in the
 reaction zone during synthesis), which can influence the magnetic properties of CNTs
 owing to different contribution of Fe-containing phases. SEM and TEM methods were
 applied to investigate morphology and structure of the synthesized material. It was
 shown that Fe₃C phase formation is favorable at high content of the catalyst in the
 feeding solution (10%), relatively low temperatures (775 ºC) during CNTs synthesis, as
 well as long duration of the CNTs growth process (5 min). The cooling rate of the reactor
 after CNTs synthesis was not crucial to iron phase contribution in our experiments.