Preparation and Electrical Contact Properties of Palladium-doped Multi-walled Carbon Nanotubes

Multi-walled carbon nanotubes (MWCNTs) were oxidized by mixed acid, and immersed into the electroless deposition solution of palladium. After ultrasonicating, resting, and stirring respectively for 5 or 10 min, palladium-doped MWCNTs were prepared, and their morphology and structure were characte-rized. The results showed that the nanoparticles were uniformly distributed onto the MWCNTs with uniform and moderate particle size and doping amount after 5 min of stirring. At the same time, the composition of the doped nanoparticles was detected as zero-valent palladium and the doping type was p-type. In the electrical contact performance test, the contact resistance between the palladium-doped CNTs and the gold electrode was significantly improved, and the average value of the resistance decreased by nearly 71. 09%.