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

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. Th...

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Published inCarbon (New York) Vol. 49; no. 14; pp. 4767 - 4773
Main Authors Anand, Benoy, Addo Ntim, Susana, Sai Muthukumar, V., Siva Sankara Sai, S., Philip, Reji, Mitra, Somenath
Format Journal Article
LanguageEnglish
Published Kidlington Elsevier Ltd 01.11.2011
Elsevier
Subjects
Carbon nanotubes
Constraining
Cross-disciplinary physics: materials science; rheology
Exact sciences and technology
Fullerenes and related materials; diamonds, graphite
Materials science
Metal oxides
Nanocomposites
Nanomaterials
Nanostructure
Nonlinearity
Physics
Specific materials
Thresholds
Sequential
Immobilization
Carbon nanotubes
Oxides
Photons
Carbon
Mechanism
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Summary: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/cm 2, these highly dispersible MWCNTs and their hybrids are excellent optical liming nanocarbons.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0008-6223
1873-3891
DOI:10.1016/j.carbon.2011.06.086