Abstract
The amorphous frustule with a mesopore pattern of the peanut-shaped marine diatom Psammodictyon panduriforme (Gregory) Mann comb. nov. (Bacillariophyta) was analyzed. Two dominating photoluminescence emission peaks in P. panduriforme were observed at 417 nm and 534 nm, and are attributed to radiative luminescence caused by oxygen-vacancy defects on the diatom frustules. Under the 355 nm pulse laser illumination, a narrow PL spectrum of frustules from the diatom P. panduriforme was observed at 475 nm with a 9.3 nm linewidth that may be caused by the resonance cavity effect on the quasi-regular pore structure on the frustules. Diatom frustules from Psammodictyon panduriforme (Gregory) Mann comb. nov. (Bacillariophyta) have quasi-regular pore patterns on the biosilica valves that can be utilized in optoelectronic devices with mesoporous structures.
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