Silica nanoparticle core structure examined by the E ' Si-gamma center Si-29 strong hyperfine interaction

Risultato della ricerca: Articlepeer review

2 Citazioni (Scopus)

Abstract

β-Ray irradiation up to 1.2 GGy was employed to induce E′Siγ defects and to study the structure of silica nanoparticles with diameters from 7 up to 20 nm. Defect concentration and their 29Si strong hyperfine doublet were investigated through electron paramagnetic resonance measurements. Our data indicate that stable defects are located in the nanoparticle core. Furthermore, the E′Siγ hyperfine interaction evidences that the core structure is denser than bulk silica and independent from the particle size. Finally, we put in evidence that the core structure is stable and unaffected by the irradiation in the investigated dose range maintaining the specific features of nanoparticles.
Lingua originaleEnglish
pagine (da-a)41-44
Numero di pagine4
RivistaJournal of Non-Crystalline Solids
Volume423-424
Stato di pubblicazionePublished - 2015

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Materials Chemistry

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