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Combined electron transport and Raman studies on the reaction of u-bromobenzene diazonium tetrafluoroborate directly with singe and networks of SWNT transistors are discussed. It is found that metallic tubes on an average have higher reactivity toward diazonium reagents.

Mirco-Raman studies were used to examine the doping of individual single-walled carbon nanotubes through noncovalent adsorption of polyethylenimine, which converts p-type semiconducting nanotubes into n-type. Very different spectral responses in metallic SWNTs (namely, the appearance of Fano line shape and the concurrent enhancement of D-band) was found to have important implications on the intrinsic phonon line shape and therefore on the electron-phonon coupling.

Nanoscopic organic multilayers that serve as excellent gate dielectrics for thin film transistors using single-walled carbon nanotubes semiconductors are demonstrated. Results suggest the potential importance of new carbon-based electronic materials for high-performance logic circuit, displays, and other systems.