Engineering Carbon Nanotubes and Nanotube Circuits Using Electrical Breakdown

Engineering Carbon Nanotubes and Nanotube Circuits Using Electrical Breakdown

27 APRIL 2001 VOL 292 | Philip G. Collins, Michael S. Arnold, Phaedon Avouris*
The article discusses a method for selectively removing individual carbon shells from multiwalled carbon nanotubes (MWNTs) and single-walled carbon nanotubes (SWNTs) using electrical breakdown. This technique allows for the tailoring of the electronic properties of these composite nanotubes, enabling the conversion of MWNTs into either metallic or semiconducting conductors and the creation of arrays of nanoscale field-effect transistors (FETs) from SWNT ropes. The process involves applying high currents to the nanotubes, which cause the oxidation of the outermost carbon shells, leading to a stepwise reduction in conductance. This method provides a reliable way to separate semiconducting SWNTs from mixtures and to generate FETs, offering insights into the complex electronic structure and transport properties of MWNTs and SWNT ropes. The controlled breakdown technique is also valuable for the fabrication of nanotube-based electronic devices, particularly in creating densely packed FETs with high switching ratios.The article discusses a method for selectively removing individual carbon shells from multiwalled carbon nanotubes (MWNTs) and single-walled carbon nanotubes (SWNTs) using electrical breakdown. This technique allows for the tailoring of the electronic properties of these composite nanotubes, enabling the conversion of MWNTs into either metallic or semiconducting conductors and the creation of arrays of nanoscale field-effect transistors (FETs) from SWNT ropes. The process involves applying high currents to the nanotubes, which cause the oxidation of the outermost carbon shells, leading to a stepwise reduction in conductance. This method provides a reliable way to separate semiconducting SWNTs from mixtures and to generate FETs, offering insights into the complex electronic structure and transport properties of MWNTs and SWNT ropes. The controlled breakdown technique is also valuable for the fabrication of nanotube-based electronic devices, particularly in creating densely packed FETs with high switching ratios.
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Understanding Engineering Carbon Nanotubes and Nanotube Circuits Using Electrical Breakdown