Toward Large Arrays of Multiplex Functionalized Carbon Nanotube Sensors for Highly Sensitive and Selective Molecular Detection

Arrays of electrical devices with each comprising multiple single-walled carbon nanotubes bridging metal electrodes are obtained by chemical vapor deposition of nanotubes across prefabricated electrode arrays

Pengfei Qi; Ophir Vermesh; Mihai Grecu; Ali Javey; Qian Wang; Hongjie Dai; Shu Peng; K. J. Cho

2003

Scholarcy highlights

  • Arrays of electrical devices with each comprising multiple single-walled carbon nanotubes bridging metal electrodes are obtained by chemical vapor deposition of nanotubes across prefabricated electrode arrays
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  • The ensemble of nanotubes in such a device collectively exhibits large electrical conductance changes under electrostatic gating, owing to the high percentage of semiconducting nanotubes. This leads to the fabrication of large arrays of low-noise electrical nanotube sensors with 100% yield for detecting gas molecules
  • Detection of molecules in a gas mixture is demonstrated with the multiplexed nanotube sensors

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