Applications of Quantitative ESR

Lund, Anders; Shiotani, Masaru; Shimada, Shigetaka

doi:10.1007/978-1-4020-5344-3_9

Cited by 1 publication

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“…Applied nanomaterials have notably improved people’s living standards throughout the last decades. Nanosilica is industrially produced and utilized massively each year, finding applications in pharmaceuticals, cosmeceuticals, food, energy, automotive, electronics, telecommunications, fiber optics, and computer technology . In addition to its advantages, this outbreak in wide use also raised concerns on its potential impacts on ecosystems and the biota .…”

Section: Introductionmentioning

confidence: 95%

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Carbon–SiO₂ Hybrid Nanoparticles with Enhanced Radical Stabilization and Biocide Activity

Fragou,

Zindrou,

Deligiannakis

et al. 2023

ACS Appl. Nano Mater.

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Nanocarbon and nanosilica are widely-used nanomaterials of significant industrial interest. Herein, a library of {carbon–SiO2} hybrid nanoparticles, with controlled nanocarbon content and sp3/sp2 profile, was engineered by a flame spray pyrolysis (FSP) process in one step. Their structure–function relationship was evaluated by studying their radical-generation and radical-stabilization activities, using electron paramagnetic resonance spectroscopy in tandem with their biocide activity toward marine bacteria Aliivibrio fischeri. The surface properties of the C–SiO2 hybrids were studied by Raman spectroscopy and surface-charge analysis by zeta potential measurements. Raman spectroscopy indicates that the FSP process, as designed and used herein, allows the progressive incorporation of nanocarbon moieties into the SiO2 nanostructure, which may lead to distortion of the siloxane matrix. Concurrently, the C–SiO2 hybrids’ surface charge profile reveals a trend correlated with the acute biocide activity toward Aliiv. fischeri. Interestingly, we find no correlation between the stable radical population and the nanohybrids’ biocide activity. Within this context, we discuss the role of surface charge, radical properties, and SiO2 lattice distortions by the nanocarbon, all of them parametrized via FSP process protocols. Thus, the present study’s findings provide critical insight into the structure–biocide activity relationship of carbon–SiO2 hybrid nanoparticles. Technology-wise, the present work exemplifies a scalable FSP process for the industrial production of applied nanomaterials, such as C–SiO2 nanostructures.

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Section: Introductionmentioning

confidence: 95%

“…The biocide activity of industrial silica has been a puzzling topic of concern to the scientific community for over seven decades . Disentangling the physicochemical phenomena, concerning its biocide activity profile under environmentally pertinent scenarios − remains a forward-looking challenge.…”

Section: Introductionmentioning

confidence: 99%

Carbon–SiO₂ Hybrid Nanoparticles with Enhanced Radical Stabilization and Biocide Activity

Fragou,

Zindrou,

Deligiannakis

et al. 2023

ACS Appl. Nano Mater.

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Applications of Quantitative ESR

Cited by 1 publication

References 61 publications

Carbon–SiO₂ Hybrid Nanoparticles with Enhanced Radical Stabilization and Biocide Activity

Carbon–SiO₂ Hybrid Nanoparticles with Enhanced Radical Stabilization and Biocide Activity

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Applications of Quantitative ESR

Cited by 1 publication

References 61 publications

Carbon–SiO2 Hybrid Nanoparticles with Enhanced Radical Stabilization and Biocide Activity

Carbon–SiO2 Hybrid Nanoparticles with Enhanced Radical Stabilization and Biocide Activity

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Carbon–SiO₂ Hybrid Nanoparticles with Enhanced Radical Stabilization and Biocide Activity

Carbon–SiO₂ Hybrid Nanoparticles with Enhanced Radical Stabilization and Biocide Activity