| Autor: |
T. D. Murav'ova, I. M. Belousova, S. K. Evstropiev, E. G. Rakov, V. M. Volynkin, D. A. Videnichev, Ivan M. Kislyakov |
| Rok vydání: |
2014 |
| Předmět: |
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| Zdroj: |
Polymers for Advanced Technologies. 25:1008-1013 |
| ISSN: |
1042-7147 |
| DOI: |
10.1002/pat.3343 |
| Popis: |
Results of the study of optical limiters of pulsed laser radiation based on nonlinear effects in carbon nanostructures placed into viscous and solid matrices are presented. A nonlinear optical limiting was studied by nanomaterials based on multi-wall polyhedral carbon nanostructures (astralens) placed in a sol–gel matrix. Similar studies for single-wall and multi-wall carbon-containing nanotubes placed in polymer matrices with various viscosities were performed. No additional mechanism of optical limiting due to electron structure of single-wall carbon-containing nanotubes at their introduction into viscous and solid composite media was found. An influence of polymer matrix composition containing carbon nanotubes (CNTs) on a threshold and ratio of attenuation of laser radiation was demonstrated. The best limiting characteristics were observed at placing CNT into polymethylsiloxane matrix. An effect of “self-healing” of a medium after laser radiation passage through high viscous liquids was obtained. The high parameters of nonlinear optical limiting (the threshold of limiting 10−5 J, ratio of attenuation 103) achieved for the composite material CNT (HiPCO High-Pressure Carbon Monoxide) and carbon nanofibers in high viscous and solid polymethylsiloxane media allow the design of protective filters for laser radiation operating in wide spectral range. Copyright © 2014 John Wiley & Sons, Ltd. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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