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. 2003 Apr 18;90(15):156401.
doi: 10.1103/PhysRevLett.90.156401. Epub 2003 Apr 15.

Tuning carbon nanotube band gaps with strain

E D Minot  1 , Yuval Yaish, Vera Sazonova, Ji-Yong Park, Markus Brink, Paul L McEuen
Affiliations

Tuning carbon nanotube band gaps with strain

E D Minot et al. Phys Rev Lett. .

Abstract

We show that the band structure of a carbon nanotube (NT) can be dramatically altered by mechanical strain. We employ an atomic force microscope tip to simultaneously vary the NT strain and to electrostatically gate the tube. We show that strain can open a band gap in a metallic NT and modify the band gap in a semiconducting NT. Theoretical work predicts that band gap changes can range between +/-100 meV per 1% stretch, depending on NT chirality, and our measurements are consistent with this predicted range.

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