A carbon nanotube is made of graphene – the world's strongest known substance.   
   Graphene is a super-thin sheet of carbon atoms arranged in a hexagonal   
   "honeycomb" pattern. Conventional pencil graphite is simply many layers of   
   graphene stacked together.   
      
   When rolled into a tube, graphene forms a CNT, a fiber 100 times stronger than   
   steel and six times lighter. This new material could pave the way for   
   remarkable technology, from improved computer chips, flexible computer screens   
   or body armor, to health    
   applications, such as bone healing and cancer treatments, and agricultural   
   products, such as smart-delivery pesticide and fertilizer applications.   
      
      
    Read more at: http://phys.org/news/2013-07-result-effects-carbo   
   -nanotubes-soil.html   
      
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