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Journal of Electron Microscopy 51:S259-S263 (2002)
© 2002 Oxford University Press

Full-length paper

Bamboo-like boron nitride nanotubes

Renzhi Ma, Yoshio Bando and Tadao Sato

National Institute for Materials Science, Advanced Materials Laboratory, Namiki 1-1, Tsukuba, Ibaraki 305-0044, Japan

To whom correspondence should be addressed. E-mail: MA.Renzhi{at}nims.go.jp

Bamboo-like boron nitride nanotubes (BN-NTs), synthesized from melamine diborate, were characterized by high-resolution transmission electron microscopy and electron energy-loss spectroscopy. A postulated morphology transformation model between bamboo-like tubes and uniform BN-NTs was proposed. Though some iron-alloy particles encapsulated inside the tubes may affect the transformation process, the temperature gradient applied in the nanotube growth process was considered as the determining factor. The formation of bamboo-like tubes became preferred when a relatively steep temperature gradient was applied.

Keywords     boron nitride nanotube, CVD, HRTEM, EELS, crystal growth


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