Facile flame synthesis and electrochemical properties of carbon nanocoils

High-purity helical carbon nanotubes with enhanced electrochemical properties for supercapacitors

“…5c above with higher magnied image exhibits two overlapped, reverse crystal planes forming the helical structure. It indicates that the nanotubes are composed of unclosed quasi-graphene layers with the interlayer distances at the range of about 3.3-3.5Å, which are consistent with the results reported by Wang et al 39,40 From the Fast Fourier Transform (FFT) pattern inset in Fig. 5c, it is suggested that HCNT is a kind of entangled semicrystalline structure.…”

Synthesis of carbon nanocoil forests on BaSrTiO3 substrates with the aid of a Sn catalyst

“…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.…”

High-yield atmospheric-pressure CVD of highly-uniform carbon nanocoils using Co–P catalyst nanoparticles prepared by electroless plating

“…Therefore, crystallinity and faceting of the CNPs may not be the key factor in achieving the high uniformity and high yield of the CNCs. A very important observation in our experiments was that the CNCs do not nucleate in the absence of thiophene, which seems to play a pivotal role in the nanocoil synthesis [22,23]. Indeed, thiophene and acetylene vapors decompose into fine and highly reactive sulfur-and carbon-bearing radicals upon thermal dissociation in the reactor.…”