Xiaosi Qi, Qi Hu, Jianle Xu, Ren Xie, Yang Jiang, Wei Zhong and Youwei Du
RSC Adv., 2015,5, 89900-89905
DOI:
10.1039/C5RA14782D,
Paper
By controlling the growth temperature, different categories of carbon nanomaterials (CNMs) such as carbon nanocoils (CNCs) and chain-like carbon nanospheres (CNSs) can be synthesized directly over Al2O3 substrate without using any transition-metal catalysts. It is proposed that the Al2O3 particles play a key role in the CNM growth, and the reaction temperature has a great impact on the morphology of the obtained CNMs. Furthermore, the photoluminescence studies indicate that the obtained CNCs and chain-like CNSs show different optical properties, which suggest that the optical properties of the obtained CNMs may be tuned by controlling their structures.