TiO2 Nanoparticle Self-assembly onto Tailored Carbon Nanotubes Kathy Lu, Materials Science and Engineering Department, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061 Mechanical-chemical acid treatment can not only shorten MWCNTs but also make the surface charge bearing TiO2 nanoparticle decorated CNTs Hybrid mechanical and chemical method is developed to tailor CNT length Opposite surface zeta-potentials of CNT and TiO2 under the same pH can be achieved for electrostatic coating TiO2 nanoparticles can attach to CNTs due to electrostatic attraction Tailored CNTs with opposite zeta-potential to that of TiO2 nanoparticles