sec.3.1, CNCs (coiled shape; diameter~100-200 nm) can be easily distinguished from CNTs
(straight;diameter~20-30 nm) and CNFs (straight;diameter>100nm)by the shape and diameter.
fig.6 shows thas the growth rase of CNCs increased from
approximately 1mg/h (25sccm C2H2)to approximately 3.5 mg/h
(50sccm C2H2),and then to approximately 4.5 mg/h(100 sccmC2H2). the growth rate exhibited a larger increment when the C2H2 flow rate increased from 25 to 50 sccm. the reason for the larqer increment of the growth rate between the 25 and the 50 sccm C2H2