Research Article Open Access

Reversible Ionizing Radiation Sensors Based on Carbon Nanotubes

Kenneth Fontánez1, Abniel Machín2, María C. Cotto1, José Duconge1, Carmen Morant3 and Francisco Márquez1
  • 1 Universidad Ana G. Méndez-Gurabo Campus, United States
  • 2 University of Puerto Rico, United States
  • 3 Universidad Autónoma de Madrid, Spain
American Journal of Engineering and Applied Sciences
Volume 13 No. 1, 2020, 49-55

DOI: https://doi.org/10.3844/ajeassp.2020.49.55

Submitted On: 14 January 2020 Published On: 3 February 2020

How to Cite: Fontánez, K., Machín, A., Cotto, M. C., Duconge, J., Morant, C. & Márquez, F. (2020). Reversible Ionizing Radiation Sensors Based on Carbon Nanotubes. American Journal of Engineering and Applied Sciences, 13(1), 49-55. https://doi.org/10.3844/ajeassp.2020.49.55

Abstract

Vertically Aligned Carbon Nanotubes (VA-CNTs) were grown by Chemical Vapor Deposition (CVD) on a silicon substrate with alternating layers of TiN and SiO2. VA-CNTs were exposed to X-ray radiation to study the change in resistivity later. Preliminary results show an increase in the resistivity of CNTs as a function of radiation exposure time, which means that the structure responds successfully to radiation exposure. The variation of resistivity has been associated with the presence of organic compounds that, during exposure to radiation, can generate species capable of interacting with the material by modifying its conductive properties. The first evidence indicates that the changes observed are reversible under heat treatment, which also supports the fact that it is the adsorbed organic species that, in the presence of radiation, modify the resistivity of the material and possibly allowing the material to be recyclable.

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Keywords

  • Vertically Aligned Carbon Nanotubes
  • Radiation
  • Sensor
  • Resistivity