Carbon Microcoil


Carbon microcoil has a spring shape and is made from carbon. CMC does not exist naturally; CMC can be synthesized by CVD method.

"carbon microcoil" is so called because the diameter of each coil of CMC is around a micrometer. There are also carbon coils which diameter is less than 1 micrometer, which are usually called as"carbon nanocoil". For simplicity here, we call these microcoils and nanocoils together as carbon microcoils.

The conductivity of a single CMC will be worse than a single CNT, but the bulk conductivity is better than CNT. Because CMC has a spring structure and the conductivity changes due to its expansion and contraction, CMC can be used as the material of stress sensor. CMC radio wave

CMC is known as a good radio wave absorbent, particularly at higher frequencies (1GHz-100GHz). The stealth effect of the electromagnetic waves is due to its spiral coil shape, which is just equivalent to a inductance coil.

CMC can also be used as a high-frequency induction heater material, because it absorbs high-frequency induction electromagnetic waves with a high efficiency.

Because the major crystalline structure of CMC is amorphous, a CMC contains a large quantity of active sites on its surfaces, so that others molecules or nanoparticles are easily supported on the surfaces.

Coil Diameter:~1μm
Coil Wire:~100nm
Coil Length:10~30μm
Carbon Purify:>95%
SEM image of As-Grown CMC

SEM image of As-Grown CMC

SEM image of As-Grown CMC

SEM image of As-Grown CMC:
Often grows radially


When Ag paste is added to CMC, an antibacterial effect is imparted.


CMC can support nickel nanoparticles to give magnetism and to tune the inductance.
Ni particles are selectively adsorbed on the CMC surface only by ordinary solution treatment.