Fabrication and characterization of multiple nanowires using microtubule structures

We have utilized a cytoskeleton, microtubule (MT), as a template for conductive nanowires. Biotin-labeled MTs were coated with streptavidin-labeled nanogold (NG) particles. Labeling of two modified MTs, biotin-labeled and NG-coated MTs, were evaluated by fluorescent and scanning electron microscopy, which verified the specific binding of NG particles on biotin-labeled MTs. Then, NG-coated MTs were further enlarged by catalytic deposition for better conductivity. Electrical characterization proved that only the enhanced NG-coated MTs have conductivity with dependency on MT and NG concentrations.