Improved optical limiting in dispersible carbon nanotubes and their metal oxide hybrids

Benoy Anand, Susana Addo Ntim, V. Sai Muthukumar, S. Siva Sankara Sai, Reji Philip, Somenath Mitra

Research output: Contribution to journalArticlepeer-review

35 Scopus citations

Abstract

The mechanism and performance of optical limiting in carbon nanotubes (CNTs) and their metal oxide hybrids are presented. The mechanism of nonlinear absorption (NLA) in dispersed CNTs was an "effective" three-photon absorption arising due to sequential transitions between the real excited states. The effect of nonlinear scattering was minimal, and it was found that the metal oxide immobilization on the CNT surface does not alter either the mechanism of NLA, or the optical limiting threshold. With limiting thresholds in the range of 0.37-0.46 J/cm2, these highly dispersible MWCNTs and their hybrids are excellent optical liming nanocarbons.

Original languageEnglish (US)
Pages (from-to)4767-4773
Number of pages7
JournalCarbon
Volume49
Issue number14
DOIs
StatePublished - Nov 1 2011

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)

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