Journal ArticleDOI
Nanosilver enhanced upconversion fluorescence of erbium ions in Er3+: Ag-antimony glass nanocomposites
Tirtha Som,Basudeb Karmakar +1 more
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TLDR
In this article, a single-step melt-quench technique involving selective thermochemical reduction was used to synthesize Ag-antimony glass nanocomposites in a dielectric matrix K2O-B2O3-Sb2O 3 by a single step melt-QUench technique.Abstract:
Er3+:Ag-antimony glass nanocomposites are synthesized in a new reducing glass (dielectric) matrix K2O–B2O3–Sb2O3 by a single-step melt-quench technique involving selective thermochemical reduction. The UV-vis-near-infrared absorption spectra show typical surface plasmon resonance (SPR) band of Ag0 nanoparticles (NPs) in addition to the distinctive absorption peaks of Er3+ ion. X-ray diffraction and selected area electron diffraction results indicate formation of Ag0 NPs along the (200) plane direction. The transmission electron microscopic image reveals the formation of spherical, fractal, and rod-shaped Ag0 NPs having maximum size ∼31 nm. The rod-shaped Ag0 NPs have aspect ratio ∼2.4. The field emission scanning electron microscopic image shows development of three dimensional cornlike microstructures. Photoluminescent upconversion under excitation at 798 nm exhibit two prominent emission bands of Er3+ ions centered at 536 (green) and 645 (red) nm due to S43/2→I415/2 and F49/2→I415/2 transitions, respect...read more
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Journal ArticleDOI
Fabrication of Ag@SiO2@Y2O3:Er Nanostructures for Bioimaging: Tuning of the Upconversion Fluorescence with Silver Nanoparticles
Fan Zhang,Gary B. Braun,Yifeng Shi,Yichi Zhang,Xiaohong Sun,Norbert O. Reich,Dongyuan Zhao,Galen D. Stucky +7 more
TL;DR: It is demonstrated that the nanostructures comprising silver cores and dense layers of Y(2)O(3):Er separated by a silica shell are an excellent model system to study the interaction between upconversion materials and metals in nanoscale.
Journal ArticleDOI
808‐nm‐Light‐Excited Lanthanide‐Doped Nanoparticles: Rational Design, Luminescence Control and Theranostic Applications
TL;DR: In this review, the progress of 808 nm-excited LnNPs is reported, including their i) luminescence mechanism, ii) Luminescence enhancement, iii) color tuning, iv) diagnostic and v) therapeutic applications.
Journal ArticleDOI
Plasmon enhancement of luminescence upconversion
TL;DR: This review presents quantum electrodynamics descriptions for all the processes involved in luminescence upconversion, which include absorption, emission, energy transfer and nonradiative transitions, followed by more detailed discussion on comparable classes of nanostructures, the effects of spacer layers and local heating, and the dynamics of the plasmon enhanced upconverted process.
Journal ArticleDOI
Modifying magnetic dipole spontaneous emission with nanophotonic structures
TL;DR: In this paper, the authors review the state-of-the-art advances in the field of spontaneous emission enhancement of magnetic dipole quantum emitters with the use of various nanophotonics systems.
Journal ArticleDOI
Surface Plasmon Resonance and Enhanced Fluorescence Application of Single-step Synthesized Elliptical Nano Gold-embedded Antimony Glass Dichroic Nanocomposites
Tirtha Som,Basudeb Karmakar +1 more
TL;DR: In this article, a series of elliptical gold nanoparticles (18-40nm) embedded antimony glass (K2O-B2O3-Sb 2O3) dichroic nanocomposites have been synthesized by a single-step melt-quench in-situ thermochemical reduction technique.
References
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Surface Plasmon Spectroscopy of Nanosized Metal Particles
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Electronic Energy Levels in the Trivalent Lanthanide Aquo Ions. I. Pr3+, Nd3+, Pm3+, Sm3+, Dy3+, Ho3+, Er3+, and Tm3+
TL;DR: In this article, the free-ion energy-level schemes of the Pr3+, Nd3+, Pm3+, Sm3+, Dy3, Dy3+, Ho3+, Er3+, and Tm3+ aquo ions have been determined from their absorption spectra in dilute acid solution at 25°.
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Nano-optics of surface plasmon polaritons
TL;DR: A surface plasmon polariton (SPP) is an electromagnetic excitation existing on the surface of a good metal, whose electromagnetic field decays exponentially with distance from the surface.
Journal ArticleDOI
Interparticle Coupling Effects on Plasmon Resonances of Nanogold Particles
TL;DR: In this article, the authors investigate the coupling between pairs of elliptical metal particles by simulations and experiments and demonstrate that the resonant wavelength peak of two interacting particles is red-shifted from that of a single particle because of near-field coupling.