Rare-earth fluorescence thermometry of laser-induced plasmon heating in silver nanoparticles arrays

Abstract

The laser-induced plasmon heating of an ordered array of silver nanoparticles, under continuous illumination with an Ar laser, was probed by rare-earth fluorescence thermometry. The rise in temperature in the samples was monitored by measuring the temperature-sensitive photoluminescent emission of a europium complex (EuTTA) embedded in PMMA thin-films, deposited onto the nanoparticles array. A maximum temperature increase of 19 °C was determined upon resonant illumination with the surface plasmon resonance of the nanoarray at the highest pump Ar laser power (173 mW). The experimental results were supported by finite elements method electrodynamic simulations, which provided also information on the temporal dynamics of the heating process. This method proved to be a facile and accurate approach to probe the actual temperature increase due to photo-induced plasmon heating in plasmonic nanosystems.

Magnetism and Afterglow United: Synthesis of Novel Double Core–Shell Eu2+‐Doped Bifunctional Nanoparticles

“…Beyond these classical applications, the joining of magnetic and luminescent properties in one single assembly represents a significant step for biotechnological and medical applications such as biosensing, bioimaging, and DNA labeling . Several examples of core–shell magnetic–fluorescent nanoparticles (NPs) have been reported previously in the literature . In general, these particles are composed of a magnetic core combined with a coating layer of luminescent material.…”

Lanthanide Luminescence Enhancement of Core–Shell Magnetite–SiO2 Nanoparticles Covered with Chain-Structured Helical Eu/Tb Complexes

“…Because of the unique luminescence properties of luminophores based on Ln 3+ ions, for example, narrow emission bands, relatively long luminescence lifetimes, multicolor emission, and large energy gaps between excitation and emission bands, 22 which result from 4f–4f electron transitions, luminescent–magnetic nanomaterials utilizing the luminescent properties of lanthanide ions are of particular interest to scientists as good materials for bioapplications. 23 − 25 These luminescent features can be further altered by external factors, such as high pressure, 26 , 27 temperature, 28 , 29 and plasmonic effects, 30 making them useful in bioimaging and sensing (e.g., pressure, temperature). In addition, inorganic lanthanide-based phosphors show lower cytotoxicity compared to heavy metal-based QDs and much higher photophysical stability than organic dyes, QDs, or gold nanoclusters, making them a promising replacement for these materials.…”

“…Various organic and inorganic materials were proposed as the luminescent phase like quantum dots (QDs), ,− inorganic nanophosphors based on lanthanide­(III) ions (Ln 3+ ), organic dyes, and d- or f-block metal complexes. − Each of these luminophores show different structural, physicochemical, and luminescent properties, which strongly affect the properties of the final multifunctional material, mainly its particles size, biocompatibility or overall strength, and stability of the luminescence. Because of the unique luminescence properties of luminophores based on Ln 3+ ions, for example, narrow emission bands, relatively long luminescence lifetimes, multicolor emission, and large energy gaps between excitation and emission bands, which result from 4f–4f electron transitions, luminescent–magnetic nanomaterials utilizing the luminescent properties of lanthanide ions are of particular interest to scientists as good materials for bioapplications. − These luminescent features can be further altered by external factors, such as high pressure, , temperature, , and plasmonic effects, making them useful in bioimaging and sensing (e.g., pressure, temperature). In addition, inorganic lanthanide-based phosphors show lower cytotoxicity compared to heavy metal-based QDs and much higher photophysical stability than organic dyes, QDs, or gold nanoclusters, making them a promising replacement for these materials.…”

Plasmophore Enhancement in Fibroblast Green Fluorescent Protein-Positive Cells Excited by Smoke

“…Therefore, the integration of SPFS with SPR biosensors can enhance the sensitivity multiples of magnitude that leads to use of fluorescent molecules in sensing the disease biomarkers and bioimaging. , While fluorescence from a molecule directly adsorbed on the surface of a metal is strongly suppressed, at a few nanometers from the metal, its fluorescence can be strongly increased . Interaction between SPs and fluorescent positive cells allows the enhancing fluorescence signal to attend molecular binding events by several orders of magnitude. , The enhanced fluorescence intensity causes the affinity of metal nanostructures in a way that much lower concentrations of biomarkers marked with fluorescence molecules can be detected especially in sensing format or for tissue imaging. , Many techniques in modern nanotechnology are explored for increasing molecular fluorescence in various applications from single-molecule sensing and biochemistry imaging to medical diagnostics and treatment. , …”

“…14,15 The enhanced fluorescence intensity causes the affinity of metal nanostructures in a way that much lower concentrations of biomarkers marked with fluorescence molecules can be detected especially in sensing format or for tissue imaging. 16,17 Many techniques in modern nanotechnology are explored for increasing molecular fluorescence in various applications from single-molecule sensing and biochemistry imaging to medical diagnostics and treatment. 18,19 In this paper, by benefiting from green fluorescent protein (GFP) in fibroblast cells, not only we had plasmophore enhancement but also we detected the smoke effect on cells with different exposure (T e ) and maintenance (T m ) times in a highlyresolved platform.…”