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          | Description: 
             This diagram shows a benzene 
            molecule configured as an XOR logic gate. Each sphere represents an 
            atom. The red and dark blue spheres represent the molecule's side 
            groups, which can be rotated to change the molecule's electrical conductance. 
            The green shapes are electrodes. | 
         
         
          | Source: 
             University College London | 
         
         
          Story:  Molecular 
            logic proposed 
            TRN March 24/31, 2004  | 
         
         
          | TRN Categories: 
             Biological, Chemical, DNA 
            and Molecular Computing; Integrated Circuits 
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          | Form: 
             Still | 
         
       
      
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