“…Firstly, it is instructive to compare the growth results that have been achieved in this study with those grown on other catalyst systems involving the use of Sn, as there is no previous study on the growth of CNC on BST substrates. For Sn-involved cases, there are numerous reports indicating that Sn is effective for inducing coiled carbon nanotube growth; whether as co-catalyst with transition metals such as Fe [9,11,12,17], Ni [24,25], and Cr [24,25], in its oxidized form (SnO 2 ) [26] or in carbide form (Fe 3 C(Sn)) [27]. For instance, Wang et al [12] demonstrated the synthesis of coiled carbon nanowires with the aid of a Fe and Sn bi-metallic catalyst.…”