Mossbauer study of iron-containing carbon nanotubes

被引:63
|
作者
Marco, JF
Gancedo, JR
Hernando, A
Crespo, P
Prados, C
González, JM
Grobert, N
Terrones, M
Walton, DRM
Kroto, HW
机构
[1] CSIC, Inst Quim Fis Rocasolano, E-28006 Madrid, Spain
[2] Inst Magnetismo Aplicado, Madrid 28230, Spain
[3] CSIC, Inst Ciencia Mat, E-28049 Madrid, Spain
[4] Univ Sussex, Fullerene Sci Ctr, Sch Chem Phys & Environm Sci, Brighton BN1 9QJ, E Sussex, England
来源
HYPERFINE INTERACTIONS | 2002年 / 139卷 / 1-4期
关键词
Fe nanowires; carbon nanotubes; Mossbauer spectroscopy; alpha-Fe; gamma-Fe; coercive field;
D O I
10.1023/A:1021218727419
中图分类号
O64 [物理化学(理论化学)、化学物理学]; O56 [分子物理学、原子物理学];
学科分类号
070203 ; 070304 ; 081704 ; 1406 ;
摘要
Fe-57 transmission Mossbauer at temperatures between 18 and 298 K and magnetic measurements have been used to characterize Fe-filled carbon nanotubes which were prepared by pyrolisis of Ferrocene + C-60 at atmospheric pressure under an Ar atmosphere at 1050 degreesC. The Mossbauer data have shown that the Fe phases encapsulated within the carbon nanotubes are alpha-Fe, Fe3C and gamma-Fe. The magnetic results are compatible with the Mossbauer data. Taken together the results allow us to propose a simple picture of the distribution of iron phases within the carbon nanotubes which would consist of an alpha-Fe core surrounded by an gamma-Fe shell, finally covered by an Fe3C layer.
引用
收藏
页码:535 / 542
页数:8
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