Their theory, published today in the Proceedings of the National Academy of   
   Sciences, deals with the observed tendency of polymeric semiconductors to   
   conduct electricity at differing rates in different parts of the material – a   
   variability that, as the    
   Stanford paper explains, turns out to depend on whether the polymer strands   
   are coiled up like a bowl of spaghetti or run relatively true, even if curved,   
   like lanes on a highway.   
      
   In other words, the entangled structure that allows plastics and other   
   polymers to bend also impedes their ability to conduct electricity, whereas   
   the regular structure that makes silicon semiconductors such great electrical   
   switches tends to make it a    
   bad fit for our back pockets.    
      
      
    Read more at: http://phys.org/news/2013-09-publish-theory-formu   
   a-plastic-semiconductors.html#nwlt   
      
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