Physics – Condensed Matter – Materials Science
Scientific paper
2007-02-08
Chem. Phys. Lett. 430 (2006) 75
Physics
Condensed Matter
Materials Science
5 pages, 4 figures, 1 table
Scientific paper
10.1016/j.cplett.2006.08.090
A series of solid organic acids were used to p-dope carbon nanotubes. The extent of doping is shown to be dependent on the pKa value of the acids. Highly fluorinated carboxylic acids and sulfonic acids are very effective in shifting the threshold voltage and making carbon nanotube field effect transistors to be more p-type devices. Weaker acids like phosphonic or hydroxamic acids had less effect. The doping of the devices was accompanied by a reduction of the hysteresis in the transfer characteristics. In-solution doping survives standard fabrication processes and renders p-doped carbon nanotube field effect transistors with good transport characteristics.
Afzali Ali
Avouris Phaedon
Klinke Christian
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