Role of optically active defects in photoluminescence properties of diatom frustules

Role of optically active defects in photoluminescence properties of diatom frustules

Diatoms are a group of unicellular photosynthetic algae having intricately patterned silica cell walls called frustules, which are made of amorphous silica. These frustules exhibit strong visible photoluminescence (PL) property when exposed to radiation of suitable frequency. Although silanol could...

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Veröffentlicht in:Bulletin of materials science 2023-11, Vol.46 (4), p.219, Article 219
Hauptverfasser: Tisso, Jayur, Konwer, Surajit, Ahmed, Gazi A, Mazumder, Nirmal, Gogoi, Ankur
Format: Artikel
Sprache:eng
Schlagworte:
Chemical bonds
Chemistry and Materials Science
Defects
Density functional theory
Energy
Engineering
Excitation
Fourier transforms
Infrared analysis
Infrared spectroscopy
Materials Science
Optical activity
Photoluminescence
Plankton
Scanning electron microscopy
Silicon dioxide
Spectrum analysis
Vibration
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Beschreibung
Zusammenfassung:Diatoms are a group of unicellular photosynthetic algae having intricately patterned silica cell walls called frustules, which are made of amorphous silica. These frustules exhibit strong visible photoluminescence (PL) property when exposed to radiation of suitable frequency. Although silanol could be one of the major sources of the observed PL for high energy irradiation (> 5 eV), its origin for low-energy excitation is still debatable. In this study, PL spectroscopy of the diatom frustules was carried out using low energy (
ISSN:0973-7669
0250-4707
0973-7669
DOI:10.1007/s12034-023-03061-8