I need some papers which explain the mechanism between MWCNTs and oxide nanoparticles.
CNT is a very good conductor in comparison to the semiconductors. Therefore, when you add some semiconducting materials to CNT network, it acts like impurities and decrease the conductivity of the composite (CNT+semiconductors) compare to pure CNT. As the conductivity decrease, resistance increase, which reduced your current in output.
Side- wall covalent functionalization of CNTs may disrupt the electron distribution through the formation of sp3 bonds. According to Park et al, (whose publication has been attached to this answer) this localized re-hybridization of the C atoms at the functionalization site may induce a localized impurity state near the Fermi- level, and may disrupt the pi- pi* electronic states.
Physical functionalization, which may be due to the pi- pi interactions, again disrupts the electron distribution, and any divergence from the innate electron characteristics (distribution, bond formation) will result in a decreased electrical conductance.
www.physics.ohio-state.edu/~hkpark/paper/nanoletter.pdf
http://cdn.intechopen.com/pdfs-wm/17292.pdf
- Badges
- Science topic
- Similar topics
- Chemistry
- Nanotechnology
- Nanostructured Materials
- Nanoparticles