View in EDS

Temperature dependence of O2 singlet photoluminescence in silica nanoparticles.

Saved in:
Bibliographic Details
Title: Temperature dependence of O2 singlet photoluminescence in silica nanoparticles.
Authors: Agnello, S.1 simonpietro.agnello@unipa.it, Vaccaro, L.1, Cannas, M.1, Kajihara, K.2
Source: Journal of Non-Crystalline Solids. Nov2013, Vol. 379, p220-223. 4p.
Subjects: Temperature effect, Oxygen, Photoluminescence, Silica nanoparticles, Thermal stability, Relaxation phenomena
Abstract: Abstract: The near infrared singlet emission and photoluminescence lifetime of O2 molecules embedded in silica nanoparticles are studied from room temperature down to 10K. The area of the photoluminescence band under infrared excitation decreases for temperature above 100K and the lifetime is shortened. These observations provide evidence of a thermally activated relaxation channel with activation energy of about 40meV. This relaxation mechanism adds to the already known temperature independent electronic-to-vibrational coupling involving high energy vibrational modes of the host matrix or its impurities. The thermally activated process is suggested to consist in the breakage of the O2 molecule weak bonds with walls of the matrix interstices with ensuing molecular motion and collisional exchange of energy. [Copyright &y& Elsevier]
Copyright of Journal of Non-Crystalline Solids is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
FullText Text:
  Availability: 0
Header DbId: egs
DbLabel: Engineering Source
An: 90525511
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: Temperature dependence of O<subscript>2</subscript> singlet photoluminescence in silica nanoparticles.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Agnello%2C+S%2E%22">Agnello, S.</searchLink><relatesTo>1</relatesTo><i> simonpietro.agnello@unipa.it</i><br /><searchLink fieldCode="AR" term="%22Vaccaro%2C+L%2E%22">Vaccaro, L.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Cannas%2C+M%2E%22">Cannas, M.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Kajihara%2C+K%2E%22">Kajihara, K.</searchLink><relatesTo>2</relatesTo>
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Journal+of+Non-Crystalline+Solids%22">Journal of Non-Crystalline Solids</searchLink>. Nov2013, Vol. 379, p220-223. 4p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Temperature+effect%22">Temperature effect</searchLink><br /><searchLink fieldCode="DE" term="%22Oxygen%22">Oxygen</searchLink><br /><searchLink fieldCode="DE" term="%22Photoluminescence%22">Photoluminescence</searchLink><br /><searchLink fieldCode="DE" term="%22Silica+nanoparticles%22">Silica nanoparticles</searchLink><br /><searchLink fieldCode="DE" term="%22Thermal+stability%22">Thermal stability</searchLink><br /><searchLink fieldCode="DE" term="%22Relaxation+phenomena%22">Relaxation phenomena</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Abstract: The near infrared singlet emission and photoluminescence lifetime of O2 molecules embedded in silica nanoparticles are studied from room temperature down to 10K. The area of the photoluminescence band under infrared excitation decreases for temperature above 100K and the lifetime is shortened. These observations provide evidence of a thermally activated relaxation channel with activation energy of about 40meV. This relaxation mechanism adds to the already known temperature independent electronic-to-vibrational coupling involving high energy vibrational modes of the host matrix or its impurities. The thermally activated process is suggested to consist in the breakage of the O2 molecule weak bonds with walls of the matrix interstices with ensuing molecular motion and collisional exchange of energy. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Non-Crystalline Solids is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=90525511
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1016/j.jnoncrysol.2013.08.016
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 4
        StartPage: 220
    Subjects:
      – SubjectFull: Temperature effect
        Type: general
      – SubjectFull: Oxygen
        Type: general
      – SubjectFull: Photoluminescence
        Type: general
      – SubjectFull: Silica nanoparticles
        Type: general
      – SubjectFull: Thermal stability
        Type: general
      – SubjectFull: Relaxation phenomena
        Type: general
    Titles:
      – TitleFull: Temperature dependence of O2 singlet photoluminescence in silica nanoparticles.
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Agnello, S.
      – PersonEntity:
          Name:
            NameFull: Vaccaro, L.
      – PersonEntity:
          Name:
            NameFull: Cannas, M.
      – PersonEntity:
          Name:
            NameFull: Kajihara, K.
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 01
              M: 11
              Text: Nov2013
              Type: published
              Y: 2013
          Identifiers:
            – Type: issn-print
              Value: 00223093
          Numbering:
            – Type: volume
              Value: 379
          Titles:
            – TitleFull: Journal of Non-Crystalline Solids
              Type: main
ResultId 1