ABSTRACT
Carbon nanocoils (sometimes called coiled or helical carbon nan-
otubes) are exotic nanomaterials having coiled geometry, resem-
bling “telephone cords” attached to the phone receiver. They exhibit
excellent mechanical properties, which owes to the combination of
flexibility due to coil morphology and the toughness resulting from
the sp2 bonding nature. Furthermore, their unique spiral structures imply versatile applications [264] such as resonating elements,
nanosprings, and reinforced fibers in high-strain composites. Novel
tactile sensors also can be built using carbon nanocoils, which
provide very high sensitivity and resolution as high as femtograms
[269].
