Microwave plasma enhanced chemical vapor deposition growth of small-diameter CNTs using the polymer based catalysts

Microwave plasma enhanced chemical vapor deposition (MPECVD) has emerged to be a promising candidate method to realize the growth of carbon nanotubes (CNTs) at a temperature of several hundred degrees Celsius. Among various catalysts, metal-containing polymers have the advantage of easy particle size and density controlling. Here we report to produce carbon nanotubes by using metal-containing polymers at 604 $^{o}$C. There are two to six wall layers. The diameter is consistently in the range of 4 to 7 nm. The control of the density and the length of the as grown nanotubes are discussed. The field emission property is characterized.