Quenching of Silver Nanoparticles

Thanikaivalan, E.; Jothilakshmi, R.

doi:10.4028/www.scientific.net/msf.781.135

Cited by 2 publications

(2 citation statements)

References 30 publications

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“…These particles being excited state quenchers could receive excitation energy from Dy 3+ through inter-band transitions, producing emission intensity quenching of Dy 3+ . The intensity quenching pathways may be either electron transfer, energy transfer or both [97]. In addition, the blue band was found to be broadened.…”

Section: Emissions Spectral Analysis 341 Downconversion Luminescencementioning

confidence: 90%

Enhanced up- and down-conversion luminescence from Dy³⁺-Sm³⁺ co-doped B₂O₃-SrCO₃-TeO₂-Al₂O₃-MgO glass hosts: effects of CuO nanoparticles embedment

et al. 2023

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In the up-conversion nonlinear optical process, the absorption of lower energy photons causes the emission of photons at higher energy due to various mechanisms like sequential optical excitation, energy transfer, and nonlinear light-matter interaction processes. Improving the up- and down-conversion luminescence of different lanthanide-doped glasses via metallic nanoparticle embedment remains challenging. There has been no clear understanding of how copper oxide nanoparticles (CuONps) affect the spectroscopic properties of the Dysprosium ions (Dy3+)-doped and Dysprosium-Samarium ions (Dy3+-Sm3+)-co-doped glasses. Thus, new CuONps-infused strontium-telluro-aluminum-magnesium-borate glass samples were prepared using the standard melt-quenching technique with Dy3+ doping and Dy3+-Sm3+ co-doping. X-ray diffraction (XRD) analysis confirmed the samples' glassy nature. High-resolution transmission electron microscopy (HRTEM) provided the orientation and size distribution of the embedded nanoparticles in the glass hosts. The downconversion luminescence emission (at 350 nm excitation) corresponds to 4F9/2→6H15/2, 4F9/2→6H13/2, and 4F9/2→6H11/2 transitions in Dy3+. Judd-Ofelt calculations for the CuONps embedded sample showed significant radiative properties. A branching ratio of 79.6% was attained. The upconversion luminescence emission (at 896 nm excitation) bands corresponded to 4F9/2→6H15/2 and 4F9/2→6H13/2 transitions for the Dy3+-doped glasses. In addition, an intense peak due to the 4G5/2→6H7/2 transition in Sm3+ was observed in the co-doped glasses. It was determined that the increased up-conversion luminescence was related to localized surface plasmon resonance, energy transfer, and local field enhancements caused by CuONps inclusion. It was confirmed that excited state absorption and energy transfer mechanisms were involved in the up-conversion luminescence. Synthesized glasses may be helpful for upconversion displays, optical data storage, and solid-state lasers.

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Section: Emissions Spectral Analysis 341 Downconversion Luminescencementioning

confidence: 90%

Enhanced up- and down-conversion luminescence from Dy³⁺-Sm³⁺ co-doped B₂O₃-SrCO₃-TeO₂-Al₂O₃-MgO glass hosts: effects of CuO nanoparticles embedment

et al. 2023

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“…The sols with different sizes of silver nanoparticles were observed. The table gives the ratio of precursors and the size of the synthesised silver nanoparticles [12].…”

Section: Synthesis Of Silver Nanoparticlesmentioning

confidence: 99%

Silver Nanoparticles - Trapping and Manipulation

Thanikaivalan¹,

Jothilakshmi²,

Murugakoothan³

2015

MSF

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Silver nanoparticles with different radii were synthesized using silver nitrate solution added with sodium borohydride solution at different ratios. The synthesized silver nanoparticles of radii 25.3 nm, 31 nm, 33.6 nm and 37.1 nm were characterized by transmission electron microscopy (TEM) and UV-vis absorption spectroscopy. The synthesized silver nanoparticles exhibit spherical morphology for all radii. The silver nanoparticles exhibit the plasmon resonance band between 390 nm – 400 nm. The optical trapping effect of Gaussian beam acting on a silver nanoparticle in Rayleigh regime was studied. The optical scattering and optical gradient forces were calculated for silver nanoparticles of different radii.

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Quenching of Silver Nanoparticles

Cited by 2 publications

References 30 publications

Enhanced up- and down-conversion luminescence from Dy³⁺-Sm³⁺ co-doped B₂O₃-SrCO₃-TeO₂-Al₂O₃-MgO glass hosts: effects of CuO nanoparticles embedment

Enhanced up- and down-conversion luminescence from Dy³⁺-Sm³⁺ co-doped B₂O₃-SrCO₃-TeO₂-Al₂O₃-MgO glass hosts: effects of CuO nanoparticles embedment

Silver Nanoparticles - Trapping and Manipulation

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Quenching of Silver Nanoparticles

Cited by 2 publications

References 30 publications

Enhanced up- and down-conversion luminescence from Dy3+-Sm3+ co-doped B2O3-SrCO3-TeO2-Al2O3-MgO glass hosts: effects of CuO nanoparticles embedment

Enhanced up- and down-conversion luminescence from Dy3+-Sm3+ co-doped B2O3-SrCO3-TeO2-Al2O3-MgO glass hosts: effects of CuO nanoparticles embedment

Silver Nanoparticles - Trapping and Manipulation

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Enhanced up- and down-conversion luminescence from Dy³⁺-Sm³⁺ co-doped B₂O₃-SrCO₃-TeO₂-Al₂O₃-MgO glass hosts: effects of CuO nanoparticles embedment

Enhanced up- and down-conversion luminescence from Dy³⁺-Sm³⁺ co-doped B₂O₃-SrCO₃-TeO₂-Al₂O₃-MgO glass hosts: effects of CuO nanoparticles embedment