Irradiation effects on the OH-related infrared absorption band in synthetic wet silica.

Risultato della ricerca: Article

25 Citazioni (Scopus)

Abstract

The effects of b-irradiation on the OH-related infrared (IR) absorption band in synthetic wet silica samples have been investigated byFourier transform infrared spectroscopy. Depending on the accumulated doses, b-irradiation affects different zones of the IR compositeband at about 3670 cm 1 , assigned to the OH stretching modes of silanol groups. These modifications are independent of the original OHcontent. The results are discussed considering possible radiation-induced changes of the silanol bonding configuration and of the glassnetwork. These are monitored by revealing the IR band a 2260 cm 1 , which is related to the distribution of Si–O–Si bond angle. We haveidentified the existence of two regimes as a function of radiation dose; low radiation doses produce the reduction of the „Si-OH hydrogen-bonded states in favor of the isolated ones, while the opposite effect is observed at higher doses, where the formation of H-bondedpairs seems to be favored.2007 Elsevier B.V. All rights reserved.
Lingua originaleEnglish
pagine (da-a)555-558
Numero di pagine4
RivistaJournal of Non-Crystalline Solids
Volume353
Stato di pubblicazionePublished - 2007

All Science Journal Classification (ASJC) codes

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

Fingerprint Entra nei temi di ricerca di 'Irradiation effects on the OH-related infrared absorption band in synthetic wet silica.'. Insieme formano una fingerprint unica.

Cita questo