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2 Acta Physica Polonica A

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Fe Clusters in Fe Intercalated Fullerite

100%

Sobczak E. , Żymierska D. , Byszewski P. , Traverse A.

nr 2

447-450

The local structure around Fe ions in the C_{60}Fe_{2} fullerites before and after heat treatment in temperature of 850 K was investigated by means of Fe K edge X-ray absorption near edge structure and extended X-ray absorption near edge structure methods. The X-ray absorption measurements were performed at liquid nitrogen temperature using synchrotron radiation in transmission mode. The X-ray absorption near edge structure and extended X-ray absorption near edge structure studies showed that the heat treatment of the C_{60}Fe_{2} fullerite at temperature 850 K causing an irreversible transition from monoclinic to fcc structure is accompanied with changes in the state of Fe ions, part of them forms clusters in bcc structure, while others turn to Fe^{3+} ions bonded to fullerenes.

Preparation and Some Properties of Carbon Nanotubes

88%

Byszewski P. , Ukalski K. , Baran M. , Dlużewski P. , Kozłowski M.

Acta Physica Polonica A

1995

tom 87

nr 4-5

885-891

Carbon nanotubes can be grown in the DC electric arc, they grow covered by a turbostratic graphite. The mechanism of the tubes growth is discussed. The magnetic susceptibility of samples, which contained aligned nanotubes exhibits anisotropic oscillatory behavior, which is ascribed to spatial quantization of the energy levels.