Morphology and Structure of Coatings Obtained by Laser Ablation of Rare-Earth Metals

Anufrick, S. S.; Kurian, N. N.; Sergienko, I. G.; Anuchin, S. N.

doi:10.1007/s10812-024-01658-3

Cited by 1 publication

(2 citation statements)

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“…It is worth noting that as the wavelength increases, the cerium-doped material absorbance value decreases. This behaviour in the UV-Vis range is a characteristic feature of some rare earth oxides [60]. A similar trend can also be observed when examining the emission spectra, as depicted in Figure 10.…”

Section: Photoluminescence Propertiessupporting

confidence: 79%

“…It indicates an upconversion process in which the absorption of two or more photons of lower energy results in the emission of a single photon of higher energy. A noticeable decrease in emission intensity at longer wavelengths is characteristic of this phenomenon [60]. The green range's most intense emission peak implies converting a longer-wavelength (red) photon to a shorter-wavelength, higher-energy photon.…”

Section: Photoluminescence Propertiesmentioning

confidence: 99%

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Diatom Biosilica Functionalised with Metabolically Deposited Cerium Oxide Nanoparticles

Wojtczak,

Brzozowska,

Trykowski

et al. 2024

Materials

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This study introduces a novel approach to synthesising a three-dimensional (3D) micro-nanostructured amorphous biosilica. The biosilica is coated with cerium oxide nanoparticles obtained from laboratory-grown unicellular photosynthetic algae (diatoms) doped metabolically with cerium. This unique method utilises the ability of diatom cells to absorb cerium metabolically and deposit it on their silica exoskeleton as cerium oxide nanoparticles. The resulting composite (Ce-DBioSiO2) combines the unique structural and photonic properties of diatom biosilica (DBioSiO2) with the functionality of immobilised CeO2 nanoparticles. The kinetics of the cerium metabolic insertion by diatom cells and the physicochemical properties of the obtained composites were thoroughly investigated. The resulting Ce-DBioSiO2 composite exhibits intense Stokes fluorescence in the violet–blue region under ultraviolet (UV) irradiation and anti-Stokes intense violet and faint green emissions under the 800 nm near-infrared excitation with a xenon lamp at room temperature in an ambient atmosphere.

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Section: Photoluminescence Propertiessupporting

confidence: 79%

Section: Photoluminescence Propertiesmentioning

confidence: 99%