Magnetic properties of the micro-silica/cement matrix with carbon-coated cobalt nanoparticles and free radical DPPH

Guskos, N.; Żołnierkiewicz, G.; Guskos, Aleksander; Typek, J.; Błyszko, Jarosław; Kiernożycki, W.; Narkiewicz, U.; Podsiadły, Marcin

doi:10.1016/j.jnoncrysol.2008.06.067

Cited by 12 publications

(6 citation statements)

References 29 publications

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“…Our aim here is to study the interaction of magnetic clusters (or agglomerates) with free radicals. The so-called 'hen and chicken' phenomenon is expected to be observed, in which the internal magnetic field produced by the clusters leads to an ordering of the spins of neighboring free radicals [5]. The temperature dependence of the position of resonance line (H r -resonance field) and linewidth, DH is shown in Figs.…”

Section: Resultsmentioning

confidence: 99%

“…The magnetic study of these materials could be helpful in better understanding the magnetic interactions of conducting electrons in the carbon matrix [2,3]. The introduction of magnetic nanoparticles in a micro-silica/cement matrix together with DPPH free radicals could have a profound influence on the magnetic state of free radicals due to magnetic field stronger than that of isolated magnetic ions [4,5].…”

Section: Introductionmentioning

confidence: 99%

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Extended free radical network from condensed cyanuric chloride with p-phenylenediamine: An EPR/FMR study

Guskos

Żołnierkiewicz

Typek

et al. 2008

Journal of Non-Crystalline Solids

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Extended free radical network from condensed cyanuric chloride with p-phenylenediamine: An EPR/FMR study

Guskos

Żołnierkiewicz

Typek

et al. 2008

Journal of Non-Crystalline Solids

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“…The dipole-dipole magnetic interaction between agglomerates and localized magnetic centers could essentially influence the reorientation processes and a large number of spins could be subjected to an average magnetic field of very low value [15]. This behavior is very important for magnetic processes in carbons, especially for multiwall carbon nanotubes [16,17].…”

Section: Resultsmentioning

confidence: 99%

Interaction between magnetic agglomerates and an extended free radicals network studied by magnetic resonance

Guskos¹,

Żołnierkiewicz

Typek

et al. 2011

Open Physics

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Ê Ú ½½ ÖÙ ÖÝ ¾¼½½ ÔØ ¾ Ë ÔØ Ñ Ö ¾¼½½ ×ØÖ ØSolids containing an extended network of free radicals have been prepared and studied by magnetic resonance techniques in the 4-290 K temperature range. One solid contained additionally a small amount of magnetic γ-Fe 2 O 3 in the form of nanoparticle agglomerates. The solid without agglomerates displayed only a narrow, single resonance line centered at = 2 0043. The magnetic resonance measurements of the solid with γ-Fe 2 O 3 agglomerates gave a spectrum composed of two lines attributed to two different magnetic centers: a narrow line due to free radicals and a broad line arising from magnetic iron oxide agglomerates. In the high temperature range the integrated intensities of both lines decreased with decreasing temperature. The resonance field of the broad line shifted to lower magnetic fields upon lowering the temperature with the gradient ∆H /∆T = 2 3 G/K, while the narrow line shifted towards higher magnetic fields. The linewidth of the broader line increased with decreasing temperature while for the narrow lines in both samples this change was small. The magnetic iron oxide clusters produce a magnetic field which acts on the free radicals network and its strength depends essentially on the concentration of clusters. The reorientation process in the free radicals network is more intense in the sample without magnetic clusters.

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“…Author concluded that due to the addition of NS in the cement mortar many properties of cement begins to improve because silica decreases in size and increase in size distribution. N. Guskos, et al, [20] (2008) examined the influence of NS and micro silica concludes that with 7% nanosilica has better microstructure. The properties were considerably improved.…”

Section: IImentioning

confidence: 99%

A Review on Nano Materials in Cement

More¹

2020

IJRASET

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The research in construction industry nowadays is mainly focusing on the basic science of cement materials at nano level. The research is also continuing to improve the durability and sustainability of concrete and realized significant increase in strength of material by incorporating nanoparticles. The review paper summarises the effect of various nanoparticles addition on the strength material. It provides the current development of application of nano-materials in mortar and concrete. Nano material can assist in intensifying the use of resources and get the required properties by reducing the use of resources. This review paper also addresses the current development regarding use of nanomaterial in construction industry. The paper first presents general information, then focuses on the most effective nano additives such as nano silica, nano-titania dioxide, iron oxides, chromium oxide, nanoclay are summarized. Along with benefits, some health risks are also associated with the use of nanotechnology. The risks are can be remedied so that the nano building products could be fully exploited for the benefits of mankind.

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Magnetic properties of the micro-silica/cement matrix with carbon-coated cobalt nanoparticles and free radical DPPH

Cited by 12 publications

References 29 publications

Extended free radical network from condensed cyanuric chloride with p-phenylenediamine: An EPR/FMR study

Extended free radical network from condensed cyanuric chloride with p-phenylenediamine: An EPR/FMR study

Interaction between magnetic agglomerates and an extended free radicals network studied by magnetic resonance

A Review on Nano Materials in Cement

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