Enhancement of Optical Absorption, Photoluminescence and Raman Transitions in Bi2O3-GeO2Glasses with Embedded Silver Nanoparticles

Martins, Michelle Márcia Viana; Silva, Diego S.; Kassab, L.R.P.; Ribeiro, Sidney J. L.; Araújo, Cid B. de

doi:10.5935/0103-5053.20150191

Cited by 7 publications

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“…Furthermore, the presence of silver nanoparticles in glass containing bismuth has been reported to enhance the fluorescence emission of Bi + . 53,54 However, in the present study, no plasmonic band from silver nanoparticle was observed: indeed, no surface plasmon resonance from metallic silver NPs and associated absorption band was observed as it is very unlikely to occur at such silver loading present in these glasses (without applying a subsequent thermal treatment around the glass transition temperature). Thus, energy transfers appear only where laser irradiation takes place, allowing for perfect background-free NIR emission whose excitation is fully mediated by energy transfers, while considering relevant excitation wavelengths.…”

Section: Energy Transfers Between Silver Clusters and Bismuth Elementscontrasting

confidence: 50%

Photochemistry of Bismuth- and Silver-Containing Glasses under Femtosecond Laser Irradiation: Energy Transfers and 3D-localized Background-Free Near-Infrared Fluorescence Emission

Alassani,

Ollier,

Raffy

et al. 2024

J. Phys. Chem. C

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The tunable fluorescence property from the visible to near-infrared (NIR) region of high-localized 3D architecture down to the diffraction limit thanks to femtosecond (fs) Direct Laser Writing (DLW) in bismuth-doped, silver-containing glass is performed. Absorption and photoluminescent spectroscopy showed evidence of the homogeneous dispersion of bismuth ions (Bi3+) and silver ions in the glass matrix before DLW. High repetition rate fs DLW simultaneously inducing the photochemistry of silver ions and the photoredox reaction of bismuth ions has been obtained. Femtosecond DLW allows the creation of 3D fluorescence patterns formed by colocalization of a silver cluster and low valence bismuth ions, exhibiting an emission band covering the whole visible to the NIR wave range. The phenomena of electron transfer from silver atoms to bismuth ions and the nonradiative energy transfer from silver clusters to NIR-emitting bismuth ions are demonstrated.

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Section: Energy Transfers Between Silver Clusters and Bismuth Elementscontrasting

confidence: 50%

Photochemistry of Bismuth- and Silver-Containing Glasses under Femtosecond Laser Irradiation: Energy Transfers and 3D-localized Background-Free Near-Infrared Fluorescence Emission

Alassani,

Ollier,

Raffy

et al. 2024

J. Phys. Chem. C

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“…The Raman bands in 1 and 1a differ slightly in their intensity, whereas 1 (silver-containing) exhibits more intense bands compared to 1a (silver-free, see Figure S5). Due to the presence of silver adsorbed to γ-Bi 2 O 3 , the surface-enhanced Raman scattering (SERS) effect is observed resulting in more intense Raman bands compared to the silver-free sample of γ-Bi 2 O 3 ( 1a ). − …”

Section: Discussionmentioning

confidence: 99%

γ-Bi₂O₃ – To Be or Not To Be? Comparison of the Sillenite γ-Bi₂O₃ and Isomorphous Sillenite-Type Bi₁₂SiO₂₀

et al. 2018

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The "controlled" synthesis of metastable γ-BiO by solution based approaches was reported several times recently, but the formation of BiSiO in the presence of trace amounts of silicates renders the results to be questionable. Here, the preparation of the Sillenite γ-BiO and the Sillenite-type BiSiO starting from the polynuclear bismuth oxido cluster [BiO(OCCH)(DMSO)] is reported. γ-BiO crystallizes after calcination at 800 °C of the silicate-free hydrolysis product "[BiO(OH)]" on a silver sheet. Corrosion of the substrate causes contamination with silver, which is not incorporated into the Bi-O lattice, and was removed by treatment with an aqueous KCN-solution. BiSiO was obtained after hydrothermal treatment of the bismuth oxido cluster in the presence of NaOH in glass vessels or NaSiO in a Teflon-lined reactor vessel followed by calcination at 600 °C. PXRD studies, scanning electron microscopy, nitrogen adsorption measurements, IR- and Raman spectroscopy, diffuse UV-vis spectroscopy, and DSC were used for characterization. The phase transition of γ-BiO to give α-BiO occurred slowly in the temperature range of 348-510 °C ( Δ H = 6.57 kJ·mol). The silver-containing γ-BiO exhibits slightly increased Raman modes compared to the silver-free sample due to the SERS effect. In the diffuse UV-vis spectrum γ-BiO exhibits an absorption edge at λ = 485 nm ( E = 2.76 eV), and the contamination with silver results in an additional absorption edge at λ = 572 nm. Silver-free γ-BiO exhibits an absorption edge at λ = 460 nm ( E = 2.83 eV) and BiSiO at λ = 422 nm ( E = 3.16 eV). The photocatalytic activity of the compounds was investigated in the decomposition of aqueous rhodamine B under visible light irradiation, showing silver-containing γ-BiO to be slightly more effective compared to BiSiO and significantly more effective than the silver-free γ-BiO.

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“…Figure 4 e shows the Raman results for the bulk samples with and without Ag NPs. We noticed for all the peaks an intensity enhancement of about 10% in the presence of Ag NPs attributed to the surface plasmon resonance contribution, which enlarged the local electric field in the interface between the Ag-NPs and the dielectric medium, the so-called surface-enhanced Raman scattering (SERS) effect [ 33 , 34 ].…”

Section: Resultsmentioning

confidence: 99%

Effect of Silver Nanoparticles on the Optical Properties of Double Line Waveguides Written by fs Laser in Nd3+-Doped GeO2-PbO Glasses

et al. 2023

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Nd3+-doped GeO2-PbO glass with silver (Ag) nanoparticles (NPs) are produced with double line waveguides through fs laser processing for photonic applications. A Ti:sapphire fs laser at 800 nm was used to write the waveguides directly into the glass 0.7 mm beneath the surface. This platform is based on pairs of parallel lines with spacing of 10 µm, each pair being formed by two identical written lines but in two different configurations of 4 or 8 separately processed lines, which are coincident. The results of optical microscopy, absorbance measurements, refractive index change, beam quality factor (at 632 and 1064 nm), photoluminescence, propagation losses, and relative gain at 1064 nm are presented. The structural changes in the glass due to the presence of Ag NPs were investigated by Raman spectroscopy. At 632 and 1064 nm, x,y-symmetrical guiding was observed, and for both kinds of overlapping pulses, a refractive index alteration of 10−3 was found in both directions. Photoluminescence growth of ~47% at 1064 nm was observed due to the plasmonic effect of Ag NPs. In dual waveguides containing Ag NPs, the relative gain obtained increased by 40% and 30% for four and eight overlapping lines, respectively, at 600 mW of 808 nm pump power, when compared to waveguides without those metallic NPs. We highlight the resultant positive internal gains of 5.11 and 7.12 dB/cm that showed a growth of ~40% and ~30%, respectively, with respect to the samples without Ag NPs. The increase in photoluminescence and relative gain were related to the local field growth produced by Ag NPs. The present results show that the addition of Ag NPs impacts positively on the optical performance at 1064 nm of double line waveguides processed by fs laser writing in Nd3+-doped GeO2-PbO glass, opening news perspectives for photonics.

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Enhancement of Optical Absorption, Photoluminescence and Raman Transitions in Bi₂O₃-GeO₂Glasses with Embedded Silver Nanoparticles

Cited by 7 publications

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Photochemistry of Bismuth- and Silver-Containing Glasses under Femtosecond Laser Irradiation: Energy Transfers and 3D-localized Background-Free Near-Infrared Fluorescence Emission

Photochemistry of Bismuth- and Silver-Containing Glasses under Femtosecond Laser Irradiation: Energy Transfers and 3D-localized Background-Free Near-Infrared Fluorescence Emission

γ-Bi₂O₃ – To Be or Not To Be? Comparison of the Sillenite γ-Bi₂O₃ and Isomorphous Sillenite-Type Bi₁₂SiO₂₀

Effect of Silver Nanoparticles on the Optical Properties of Double Line Waveguides Written by fs Laser in Nd3+-Doped GeO2-PbO Glasses

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Enhancement of Optical Absorption, Photoluminescence and Raman Transitions in Bi2O3-GeO2Glasses with Embedded Silver Nanoparticles

Cited by 7 publications

References 0 publications

Photochemistry of Bismuth- and Silver-Containing Glasses under Femtosecond Laser Irradiation: Energy Transfers and 3D-localized Background-Free Near-Infrared Fluorescence Emission

Photochemistry of Bismuth- and Silver-Containing Glasses under Femtosecond Laser Irradiation: Energy Transfers and 3D-localized Background-Free Near-Infrared Fluorescence Emission

γ-Bi2O3 – To Be or Not To Be? Comparison of the Sillenite γ-Bi2O3 and Isomorphous Sillenite-Type Bi12SiO20

Effect of Silver Nanoparticles on the Optical Properties of Double Line Waveguides Written by fs Laser in Nd3+-Doped GeO2-PbO Glasses

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Enhancement of Optical Absorption, Photoluminescence and Raman Transitions in Bi₂O₃-GeO₂Glasses with Embedded Silver Nanoparticles

γ-Bi₂O₃ – To Be or Not To Be? Comparison of the Sillenite γ-Bi₂O₃ and Isomorphous Sillenite-Type Bi₁₂SiO₂₀