Macroscopic invisible cables
- 52 Downloads
Spiders suggest to us that producing high strength over density ratio invisible cables could be of great importance. In this paper we show that such invisible cables could in principle be built, thanks to carbon nanotube bundles. Theoretical strength of ~10 MPa, Young’s modulus of ~0.1 GPa and density of ~0.1 Kg/m3 are estimated. The theoretical strength over density ratio is huge, i.e. that of a single carbon nanotube; the strength of a real, thus defective, invisible cable is estimated to be ~1 MPa. Finally, we demonstrate that such cables can be easily transported in their visible state (with bunched nanotubes) and that an efficient anti-bunching controllable mechanism, involving pressure of ~1 Pa, can control the visible–invisible transition, and vice versa.
N.P. is supported by the ‘‘Bando Ricerca Scientifica Piemonte 2006’’—BIADS: novel biomaterials for intraoperative adjustable devices for fine tuning of prostheses shape and performance in surgery.
- Pugno N (2004) Recent research developments in sound and vibrations. Transw Res Netw 2:197–211Google Scholar
- Pugno N (2007a) A journey on the nanotube, in the “Top ten advances in materials”. Mater Today 11:40–45Google Scholar
- Pugno N (2007b) Towards a Spiderman suit: large invisible cables and self-cleaning releasable super-adhesive materials. J Phys Cond Mat 19:395001 (pp 17)Google Scholar
- Tang T, Jagota A, Hui CY (2005) Adhesion between single-walled carbon nanotubes. J Appl Phys 97:074304/1–6Google Scholar
- Yakobson BI (1997) In: Ruoff RS, Kadish KM (eds) recent advances in the chemistry and physics of fullerences and related materials, electrochemical society, (Electrochemical Society, Inc., Pennington, NJ), vol 5 (97–42), p 549Google Scholar