Applied Physics Letters · 2001 · 266 citations · 14 references
Natural SciencesMaterials EngineeringMaterials ScienceElectrochemistryNanomaterialsNanotechnologyCarbon NanomaterialsCarbon NanotubesDopingNanoelectronicsNanostructured Electronic MaterialsNanotubesCapacitanceCarbon Nanotube Electrical ConductivityCarbon Nanotube Field-effect TransistorsElectric Field EffectsElectrical Conductivity Of NanotubesFermi FunctionNanotube Doping
We explore the electric-field effect of carbon nanotubes (NTs) in electrolytes. Due to the large gate capacitance, Fermi energy (EF) shifts of order ±1 V can be induced, enabling to tune NTs from p to n-type. Consequently, large resistance changes are measured. At zero gate voltage, the NTs are hole-doped in air with |EF|≈0.3–0.5 eV, corresponding to a doping level of ≈1013 cm−2. Hole-doping increases in the electrolyte.
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