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Nano Lett. 2008 Dec;8(12):4288-92. doi: 10.1021/nl801981m.

Revealing the secret of water-assisted carbon nanotube synthesis by microscopic observation of the interaction of water on the catalysts.

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  • 1Nanotube Research Center, National Institute of Advanced Industrial Science and Technology, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan.


We elucidated the secret of water-assisted chemical vapor deposition (CVD) by elucidating the influence of water on the catalysts, through ex situ microscopic and spectroscopic analysis. We unambiguously showed that catalyst deactivation readily occurs due to carbon coating and that water acted to remove this coating and revive catalysts activity. This represents the central point of water-assisted CVD.

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