A luminescence study of porous diatoms

K. S A Butcher*, J. M. Ferris, M. R. Phillips, M. Wintrebert-Fouquet, J. W. Jong Wah, Nemanja Jovanovic, W. Vyverman, V. A. Chepurnov

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

50 Citations (Scopus)

Abstract

The cathodoluminescent and photoluminescent properties of the nanoporous silica frustules of various diatom strains and of natural diatom samples are presented. The spectra are observed to be similar to that of pure silica glass and the phenology is therefore believed to also be somewhat similar. A strong UV-blue luminescence peak is commonly observed as well as a yellow peak at 2.15 eV. For the more heavily silicified field-collected freshwater benthic samples, a strong red peak at 1.95 eV is also observed. The 2.15 eV peak is also more strongly evident for the field-collected samples. The UV-blue peak is related to common silica defect structure but cathodoluminescent microanalysis shows that this emission is highly localized in the diatom samples.

Original languageEnglish
Pages (from-to)658-663
Number of pages6
JournalMaterials Science and Engineering C
Volume25
Issue number5-8
DOIs
Publication statusPublished - Dec 2005

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