He, Maoshuai and Chernov, Alexander I. and Obraztsova, Elena D. and Sainio, Jani and Rikkinen, Emma and Jiang, Hua and Zhu, Zhen and Kaskela, Antti and Nasibulin, Albert G. and Kauppinen, Esko I. and NiemelÃ¤, Marita and Krause, Outi (2011) Low temperature growth of SWNTs on a nickel catalyst by thermal chemical vapor deposition. Nano Research, 4 (4). pp. 334-342. ISSN 1998-0124 (Print) 1998-0000 (Online)
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Single-walled carbon nanotubes (SWNTs) have been grown on a silica-supported monometallic nickel (Ni) catalyst at temperatures ranging from as low as 450 °C to 800 °C. Different spectroscopic techniques, such as Raman, photoluminescence emission (PLE), and ultra violet-visible-near infrared (UV-vis-NIR) absorption spectroscopy were used to evaluate the diameter and quality of the SWNTs grown over the Ni catalyst at different temperatures. The analysis revealed that high quality SWNTs with a very narrow diameter distribution were obtained at a growth temperature of 500 °C. In the PLE and absorption spectra, differences were observed between the SWNTs grown on Ni and those grown on cobalt (Co). This result expands the potential of growing a specific (n, m) tube species with relatively high abundance by tuning the catalyst composition. Furthermore, the prerequisites for the low temperature growth of SWNTs over a monometallic transition metal catalyst have been elucidated.
|Subjects:||Material Science > Nanochemistry|
|Deposited By:||M T V|
|Deposited On:||09 May 2011 09:58|
|Last Modified:||09 May 2011 09:58|
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