Electrical properties study of multi-walled carbon nanotubes/hybrid-glass nanocomposites

Mariana Pokrass, Doron Azulay, Isaac Balberg, Nurit Atar, Raz Gvishi*, Menachem Nathan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


Electrical properties of multi-walled carbon nanotubes (MWNTs)/hybrid-glass nanocomposites prepared by the fast-sol-gel reaction were investigated in light of percolation theory. A good correlation was found between the experimental results and the theory. We obtained a percolation threshold c = 0.22 wt%, and a critical exponent of t = 1.73. These values are reported for the first time for a silica-based system. The highest conductivity measured on the MWNT/hybrid-glass nanocomposites was σ ≈ 10-3(Ω cm)-1 for 2 wt% carbon nanotube (CNT) loading. The electrical conductivity was at least 12 orders of magnitude higher than that of pure silica. Electrostatic force microscopy and conductive-mode atomic force microscopy studies demonstrated conductivity at the micro-level, which was attributed to the CNT dispersed in the matrix. It appears that the dispersion in our MWNT/hybrid-glass system yields a particularly low percolation threshold compared with that of a MWNT/silica-glass system. Materials with electrical conductivities described in this work can be exploited for anti-static coating.

Original languageAmerican English
Pages (from-to)517-527
Number of pages11
JournalJournal of Sol-Gel Science and Technology
Issue number3
StatePublished - Jun 2014


  • Electrical conductivity
  • Hybrid-glass
  • Multi-walled carbon nanotube
  • Nanocomposites
  • Percolation threshold
  • Sol-gel


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