Effects of antifreezes and bundled material on the stability and optical limiting in aqueous suspensions of carbon nanotubes

Vlasov, A. Yu.; Venediktova, Anastasia V.; Videnichev, D. A.; Kislyakov, I. M.; Obraztsova, E. D.; Sokolova, E. P.

doi:10.1002/pssb.201200089

Cited by 17 publications

(12 citation statements)

References 18 publications

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“…The third option to control OPL parameters of aqueous‐based CNP dispersions resides on the idea of “auto‐synergism” in materials containing the CNP agglomerates . In a scoop, it means that agglomeration enhances conversion of optical energy into heat, which, in turn, generates inhomogeneities scattering the incident light.…”

Section: Resultsmentioning

confidence: 99%

“…Samples were ultrasonicated during 5, 15, or 60 min and ultra‐centrifuged in a standard regime (150 000 g, 1 h); SDOC being a stabilizing agent. The dependency of optical and OPL parameters upon the degree of SWCNT debundling was previously investigated with SDBS as a stabilizer . OPL measurements in the present study were performed using a setup similar to that described by Venediktova et al…”

Section: Resultsmentioning

confidence: 99%

“…Next, we studied by z ‐scan methodology the OPL and bleaching in suspensions of CB and SWCNT in aqueous suspensions doped with PVA (concentrations spanning from 0 to 3 wt%). Eventually we revisited the impact of the SWCNT aggregation degree on the stability and OPL performance of their suspensions.…”

Section: Introductionmentioning

confidence: 99%

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Aggregative Characteristics of Nanocarbon and of a Stabilizing Surfactant in the Aqueous‐Polymer Matrix versus Optical Power Limiting Performance

Vlasov

Venediktova

Ivanov

et al. 2019

Physica Status Solidi (b)

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By the example of single‐walled carbon nanotubes (SWCNT) stabilized by sodium deoxycholate in “water + polyvinyl alcohol” medium, the impact of aggregative peculiarities of a stabilizer on the efficacy of dispersing the photoactive agent is investigated. This feature is collated with respect to alternative common anionic surfactants in SWCNT suspensions. The temporal stability of dispersions of the nanocarbon (SWCNT vs carbon black) stabilized by sodium deoxycholate in a medium with controlled viscosity is juxtaposed. The optical power limiting characteristics of these dispersions versus concentration of a polymer dopant (0–3 wt%) is also monitored. In particular, the resistibility of such materials regarding bleaching phenomena in a pulse‐periodic regime (pulse repetition rate 10 Hz) of nanosecond laser irradiation (wavelength 532 nm) is addressed. It is demonstrated that optimal concentration of a polymer dopant (≈1.0 wt%) ensures elimination of bleaching with respect to the irradiation conditions studied.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Aggregative Characteristics of Nanocarbon and of a Stabilizing Surfactant in the Aqueous‐Polymer Matrix versus Optical Power Limiting Performance

Vlasov

Venediktova

Ivanov

et al. 2019

Physica Status Solidi (b)

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“…Good functionality of different solvents doped by CNTs are mainly determined by their temporal stability and reproducibility of their properties [41][42][43]. Usually, dispersability of CNTs is rather bad, and they show high tendency to aggregation or formation of bundles [44,45].…”

Section: Dispersing Of Cntsmentioning

confidence: 99%

Carbon Nanotubes in Liquid Crystals: Fundamental Properties and Applications

Lisetski

Soskin

Lebovka

2015

Springer Proceedings in Physics

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The structure and properties of liquid crystalline suspensions filled by carbon nanotubes (CNTs) are critically reviewed. Special attention is paid to interactions between CNTs and molecules of the liquid crystals (LC), which lead to formation of ordered supramolecular structures. These structures, in turn, determine unique physical properties of LC + CNT suspensions, including electrical conductivity, dielectric permittivity, phase transitions, optical transmission, memory effects that can be used in electrooptic and optoelectronic devices, etc. Great variety of LC phases are considered as a host media, such as nematics, cholesterics, smectics of different types (including ferroelectrics), lyotropic, chromonic, ionic and hydrogen-bonded liquid crystals. Alongside multi-and single-walled carbon nanotubes, the suspensions can also contain the platelets of organoclays used for facilitation of CNT dispersing. Recent practical applications of LC + CNT suspensions and nanomaterials based thereon are also outlined.

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“…Thus, one can easily obtain the attenuation 10 2 ÷ 10 3 for nanosecond pulses of radiation at the wavelengths of high harmonics of Nd‐YAG laser at the field of vision as large as 1.5 mrad. The compositions were obtained, which were stable during 1‐year period, keeping their spectral and nonlinear optical characteristics within wide temperature range (from ‐40°С to +50°С) …”

Section: Introductionmentioning

confidence: 99%

Nonlinear optical limiters of pulsed laser radiation based on carbon‐containing nanostructures in viscous and solid matrices

Белоусова

Videnichev

Volynkin

et al. 2014

Polymers for Advanced Techs

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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 À5 J, ratio of attenuation 10 3 ) 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.

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Effects of antifreezes and bundled material on the stability and optical limiting in aqueous suspensions of carbon nanotubes

Cited by 17 publications

References 18 publications

Aggregative Characteristics of Nanocarbon and of a Stabilizing Surfactant in the Aqueous‐Polymer Matrix versus Optical Power Limiting Performance

Aggregative Characteristics of Nanocarbon and of a Stabilizing Surfactant in the Aqueous‐Polymer Matrix versus Optical Power Limiting Performance

Carbon Nanotubes in Liquid Crystals: Fundamental Properties and Applications

Nonlinear optical limiters of pulsed laser radiation based on carbon‐containing nanostructures in viscous and solid matrices

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