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Undoped, nitrogen-doped and boron-doped multiwalled carbon nanotube/poly(vinyl alcohol) composite as active layer in simple hydrostatic pressure sensors

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Abstract

We report on hydrostatic pressure sensors prepared using 10 % w/w multiwalled carbon nanotube (MWCNT)/poly(vinyl alcohol) composites. Three types of carbon nanotubes were used in the composites: undoped MWCNTs, nitrogen-doped MWCNTs and boron-doped MWCNTs (B-MWCNTs). The sensor response was tested using an alternating current input, measuring the capacitance and conductance outputs. The sensors based on the three composites show a linear capacitance and conductance sensitivity pressure dependence in the range 50–120 kPa, but a higher sensitivity to pressure dependence above this interval. The highest angular coefficient of the sensitivity, which reached 0.092 kPa−1, was observed for the capacitance sensitivity of the B-MWCNT based composite.

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Acknowledgments

The authors would like to thank CNPq (Brazil), CONACYT (Mexico) and NRF (South Africa) for research grants and Prof Jonas Gruber for the interdigitated electrodes.

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Authors and Affiliations

  1. Departamento de Física, Universidade Federal do Paraná, Caixa Postal 19044, Curitiba, PR, 81531-980, Brazil

    Messai A. Mamo, Alan O. Sustaita & Ivo A. Hümmelgen

  2. Advanced Materials Department, IPICYT, Camino a la Presa San José 2055, Col. Lomas 4a sección, 78216, San Luis Potosí, Mexico

    Alan O. Sustaita

  3. DST/NRF Centre of Excellence in Strong Materials and Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, PO Wits, Johannesburg, 2050, South Africa

    Zikhona N. Tetana & Neil J. Coville

Authors
  1. Messai A. Mamo
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  2. Alan O. Sustaita
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  3. Zikhona N. Tetana
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  4. Neil J. Coville
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  5. Ivo A. Hümmelgen
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Correspondence to Ivo A. Hümmelgen.

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Mamo, M.A., Sustaita, A.O., Tetana, Z.N. et al. Undoped, nitrogen-doped and boron-doped multiwalled carbon nanotube/poly(vinyl alcohol) composite as active layer in simple hydrostatic pressure sensors. J Mater Sci: Mater Electron 24, 3995–4000 (2013). https://doi.org/10.1007/s10854-013-1352-6

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  • DOI: https://doi.org/10.1007/s10854-013-1352-6

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