Piezoresistance of carbon nanotubes on deformable thin-film membranes
- 23 February 2005
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 86 (9) , 093104
- https://doi.org/10.1063/1.1872221
Abstract
Carbon nanotubes have interesting electromechanical properties that may enable a new class of nanoscale mechanical sensors. We fabricated two-terminal nanotube devices on silicon nitride membranes, measured their electronic transport versus strain, and estimated their band gaps and the strain-induced changes in them. We found band-gap increases and decreases among both semiconducting and small-gap semiconducting (SGS) tubes. The SGS band gaps exceeded the predicted curvature-induced gaps for their diameter. Some of the band-gap changes for both types of tubes exceeded the predicted maxima. These anomalies are likely caused by interaction with the rough silicon nitride surface.Keywords
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