Carbon nanocoils (CNCs) are an exotic lesson of low-dimensional nanocarbons whose helical shape may make them suitable for applications such as microwave absorbers and various mechanical components such as springs. Typical thicknesses and coil diameters of CNCs descend within the ranges of 100-400 nm and 400-1000 nm,respectively, and their full lengths are much larger, and on the order of several tens of micrometers. Despite earlier pioneering work,the relationships between the geometric shape of natural CNCs and their mechanical and electrical properties, particularly the electrical resistivity, and are not well understood.
Source: phys.org