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Article: Studies in the area of physical chemistry reported from H. Oshima and co-researchers.
- Article from:
- Nanotechnology Weekly
- Article date:
- November 16, 2009
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According to a study from Japan, "The behavior of Fe catalyst, from its deposition on a SiO2/Si substrate with or without an Al buffered layer to the end of carbon nanotube (CNT) synthesis under hydrogen- and water vapor-added conditions, was investigated by Mossbauer spectroscopy and scanning electron microscopy. The analyses revealed that the chemical states of the catalyst, not only the morphology, change drastically in the presence of the Al buffered layer."
"In the case of Fe/SiO2/Si without Al, a quarter of the deposited alpha-Fe changed to Fe2SiO4 at the heat-up stage, and then not only alpha-Fe but also Fe2SiO4 appeared to act as CNT synthesis catalysts. ...