Zinc oxide decorated multi-walled carbon nanotubes: Their bolometric properties

Guadalupe García-Valdivieso, J. Jesús Velázquez-Salazar, José Enrique Samaniego-Benítez, Hiram Joazet Ojeda-Galván, M. Josefina Arellano-Jiménez, Karí G.H. Martínez-Reyna, Miguel José-Yacamán, Hugo R. Navarro-Contreras

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

We report the synthesis of MWNT/ZnO hybrid nanostructures. A simple, affordable, chemical procedure to functionalize MWNTs with ZnO nanoparticles was performed. A significant portion of the surface of MWNTs was covered with ZnO nanoparticles; these particles formed highly porous spherical nodules of 50-150 nm in diameter, sizes that are an order of magnitude larger than similar ZnO nanonodules reported in the literature. Hence, the self-assembled nanocomposite the ZnO exhibited a large surface-to-volume ratio, which is a very advantageous property for potential catalytic applications. The resultant MWNT/ZnO nanocomposites were characterized by x-ray diffraction, scanning and high-resolution transmission electron microscopy, and UV-vis and Raman spectroscopy. The temperature coefficient of resistance (TCR) of the nanocomposites was measured and reported. The average TCR value goes from -5.6%/K up to -18%/K, over temperature change intervals from 10 K to 1 K. Based on these TCR results, the nanocomposite MWNT/ZnO prepared in this work is a promising material, with potential application as a bolometric sensor.

Original languageEnglish (US)
Article number125607
JournalNanotechnology
Volume29
Issue number12
DOIs
StatePublished - Feb 12 2018
Externally publishedYes

Keywords

  • bolometers
  • multiwalled carbon nanotubes
  • nanocomposite
  • zinc oxide

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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