Low temperature growth of SWNTs on a nickel catalyst by thermal chemical vapor deposition
Single-walled carbon nanotubes, synthesis, low temperature, nickel catalyst
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.
Tsinghua University Press
Maoshuai He,Alexander I. Chernov,Elena D. Obraztsova,Jani Sainio,Emma Rikkinen,Hua Jiang,Zhen Zhu,Antti Kaskela,Albert G. Nasibulin,Esko I. Kauppinen,Marita Niemelä,Outi Krause, Low temperature growth of SWNTs on a nickel catalyst by thermal chemical vapor deposition. NanoRes.2011, 4(4): 334–342