Aqueous suspensions of single-wall carbon nanotubes: Degree of aggregation into bundles and optical properties

Venediktova, Anastasia V.; Bocharov, Vladimir N.; Vlasov, A. Yu.; Kislyakov, I. M.; Киселев, В. М.; Кац, Е.А.; Obraztsova, E. D.; Pozharov, A. S.; Povarov, S. A.

doi:10.1134/s0030400x14030230

Cited by 8 publications

(7 citation statements)

References 15 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%

“…The latter conclusion is in line with the data previously obtained for arc‐discharge SWCNT by Raman spectroscopy and discussed in ref. . Therein, basing on the analysis of the D‐ and G‐ bands intensities in Raman spectra of SWCNT, it was inferred that longer ultrasonication duration of suspensions causes an increase in defectiveness in the sp 2 ‐hybridized orbital of a nanotube: intercarbon bonds break in some instances, and atoms with sp 3 ‐hybridized orbitals emerge.…”

Section: Resultsmentioning

confidence: 99%

“…So, in ref. , it was observed that reduction in the degree of the SWCNT association gives rise in the defectiveness with an increase in the ultrasonication time.…”

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%

Section: Resultsmentioning

confidence: 99%

“…So, in ref. , it was observed that reduction in the degree of the SWCNT association gives rise in the defectiveness with an increase in the ultrasonication time.…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

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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Transcutaneous Measurement of Essential Vitamins Using Near‐Infrared Fluorescent Single‐Walled Carbon Nanotube Sensors

Bakh

Gong

Lee

et al. 2021

Small

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Vitamins such as riboflavin and ascorbic acid are frequently utilized in a range of biomedical applications as drug delivery targets, fluidic tracers, and pharmaceutical excipients. Sensing these biochemicals in the human body has the potential to significantly advance medical research and clinical applications. In this work, a nanosensor platform consisting of single‐walled carbon nanotubes (SWCNTs) with nanoparticle corona phases engineered to allow for the selective molecular recognition of ascorbic acid and riboflavin, is developed. The study provides a methodological framework for the implementation of colloidal SWCNT nanosensors in an intraperitoneal SKH1‐E murine model by addressing complications arising from tissue absorption and scattering, mechanical perturbations, as well as sensor diffusion and interactions with the biological environment. Nanosensors are encapsulated in a polyethylene glycol diacrylate hydrogel and a diffusion model is utilized to validate analyte transport and sensor responses to local concentrations at the boundary. Results are found to be reproducible and stable after exposure to 10% mouse serum even after three days of in vivo implantation. A geometrical encoding scheme is used to reference sensor pairs, correcting for in vivo optical and mechanical artifacts, resulting in an order of magnitude improvement of p‐value from 0.084 to 0.003 during analyte sensing.

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Structure and properties of aqueous dispersions of sodium dodecyl sulfate with carbon nanotubes

et al. 2016

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Aqueous suspensions of single-wall carbon nanotubes: Degree of aggregation into bundles and optical properties

Cited by 8 publications

References 15 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

Transcutaneous Measurement of Essential Vitamins Using Near‐Infrared Fluorescent Single‐Walled Carbon Nanotube Sensors

Structure and properties of aqueous dispersions of sodium dodecyl sulfate with carbon nanotubes

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