English, Article edition: SYNTHESIS AND DEGRADATION OF THE PbS NANOPARTICLE PHOSPHORS EMBEDDED IN SiO2 (SiO2:PbS) M. S. DHLAMINI; J. J. TERBLANS; O. M. NTWAEABORWA; ...

User activity

Share to:
 
Bookmark: http://trove.nla.gov.au/version/84697
Physical Description
  • article
Language
  • English

Edition details

Title
  • SYNTHESIS AND DEGRADATION OF THE PbS NANOPARTICLE PHOSPHORS EMBEDDED IN SiO2 (SiO2:PbS)
Author
  • M. S. DHLAMINI
  • J. J. TERBLANS
  • O. M. NTWAEABORWA
  • H. C. SWART
Physical Description
  • article
Notes
  • PbS nanoparticle phosphors embedded in SiO2 were synthesized at room temperature by the solâgel method. The as-prepared SiO2:0.134 mol% PbS nanoparticles were ground and annealed in atmosphere. Changes in the cathodoluminescence (CL) brightness and the surface chemical composition of the SiO2:0.134 mol% PbS nanoparticle powders were investigated using a Fiber Optics PC2000 spectrometer for CL and Auger Electron Spectroscopy (AES) and X-ray Photoelectron Spectroscopy (XPS) for the surface chemical analysis. The chemical composition of the powders was analyzed by an energy-dispersive spectrometer (EDS). The CL intensity decreased when the powders were irradiated with a beam of electrons at 2 keV energy and a beam current density of 54 mA/​cm2 in an ultra-high vacuum chamber at oxygen (O2) pressures ranging between 5 Ã 10-8 and 2 Ã 10-7 Torr for several hours. The O2 Auger peak-to-peak height (APPH) decreased as the CL intensity decreased. XPS analysis on the degraded spot showed the development of characteristic SiO, SiOx, and elemental Si peaks on the low-energy side of the SiO2 peak. The desorption of O2 from the surface, which resulted in a decrease in the CL intensity is attributed to the dissociation of SiO2 into elemental Si and O2 by the electron bombardment. The degradation was less severe at higher oxygen pressures. PbSO4 was also formed on the surface during the electron beam degradation process.
  • Cathodoluminescent, Nanoparticle, Degradation, SiO2, PbS, solâgel
  • RePEc:wsi:srlxxx:v:14:y:2007:i:04:p:697-701
Language
  • English
Contributed by
OAIster

Get this edition

  • Set up My libraries

    How do I set up "My libraries"?

    In order to set up a list of libraries that you have access to, you must first login or sign up. Then set up a personal list of libraries from your profile page by clicking on your user name at the top right of any screen.

  • All (1)
  • Unknown (1)
None of your libraries hold this item.
None of your libraries hold this item.
None of your libraries hold this item.
None of your libraries hold this item.
None of your libraries hold this item.
None of your libraries hold this item.
None of your libraries hold this item.
None of your libraries hold this item.

User activity


e.g. test cricket, Perth (WA), "Parkes, Henry"

Separate different tags with a comma. To include a comma in your tag, surround the tag with double quotes.

Be the first to add a tag for this edition

Be the first to add this to a list

Comments and reviews

What are comments? Add a comment

No user comments or reviews for this version

Add a comment