Fluorescence quenching and energy transfer in a system of hybrid laser dye and functionalized gold nanoparticles

Błaszkiewicz, Paulina; Kotkowiak, Michał; Dudkowiak, Alina

doi:10.1016/j.jlumin.2016.11.023

Cited by 11 publications

(7 citation statements)

References 42 publications

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“…This means that the efficiencies of deactivation processes which take place with the participation of singlet and/or triplet states of Pheide are modified by the presence and amounts of Au-NRs@SiO 2 . In the physical mixture of the dye and NPs (in this case NRs), the dynamic quenching of fluorescence could be considered as reported in our previous study for spherical NPs . As shown in Figure c, the value of K SV decreases with the increasing thickness of the SiO 2 shell.…”

Section: Results and Discussionmentioning

confidence: 80%

Tailoring Fluorescence and Singlet Oxygen Generation of a Chlorophyll Derivative and Gold Nanorods via a Silica Shell

et al. 2019

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Gold nanorods deserve special attention as they exhibit tunable longitudinal localized surface plasmon resonances (LSPRs). In our study, gold nanorods of the aspect ratio of 2.25 (maximum of LSPR band at 660 nm) and of controllable SiO 2 thickness in the range of 6−14 nm were mixed with pheophorbide (chlorophyll derivative) in order to create a hybrid system. Energy transfer and singlet oxygen generation were studied for different SiO 2 thicknesses of the nanorod shell. The spectral properties of the hybrid mixture were characterized, and the overlapping of the pheophorbide fluorescence and the longitudinal LSPR band of nanorods on the fluorescence emission, energy transfer, and generation of singlet oxygen were studied. Two independent approaches were used to determine the quantum yield and enhanced factor of singlet oxygen generation. For a certain thickness of the SiO 2 shell and for certain concentrations of gold nanorods, the effect of the plasmon-enhanced singlet oxygen production was observed. Moreover, the enhanced of singlet oxygen yield enhancement was correlated with the far-field optical properties of the gold nanorods. The results obtained indicate the significance of further studies of dye-photosensitizers in hybrid mixtures, taking into account the spectral overlap between dye emission and longitudinal LSPR bands as well as the character of coatings (type and thickness) and scattering yields of gold nanorods.

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Section: Results and Discussionmentioning

confidence: 80%

Tailoring Fluorescence and Singlet Oxygen Generation of a Chlorophyll Derivative and Gold Nanorods via a Silica Shell

et al. 2019

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“…( 3) and it's found 54.87 M -1 . All of the samples studied had linear Stern-Volmer dependence, implying a single quenching process (Błaszkiewicz, Kotkowiak and Dudkowiak, 2017).…”

Section: Resultsmentioning

confidence: 92%

The Effect of Mixing Nanoparticles on the Suspension Physical Stability

Kareem¹,

Saeed²,

Kadhemy³

et al. 2022

KJS publishes peer-review articles in Mathematics, Computer Sci

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Energy transfer in a hybrid mixture of Rhodamine 6G (Rh6G) dye laser as a donor and nanoparticles (NPs) as an acceptor were studied. The absorption spectra of 1×10-5M of Rh6G in Distilled Water show increase in the intensity when adding NPs. noticeable, improve the spectra when adding Aluminum Oxide Al2O3 NPs. Adding NPs quench the fluorescence spectra of Rh6G due to Förster resonance energy transfer (FRET). The efficiency of energy transfer increase with increasing concentration of NPs. Best value of efficiency of energy transfer found in Rh6G/ Magnesium Oxide MgO NPs. Strong relationship was in Rh6G/ Al2O3 NPs.

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“…The spherical GNPs were obtained using a modified Turkevich method according to the manufacturer's protocol [37,38]. A description of the synthesis process can be found in Appendix A.…”

Section: Synthesis Of the Gold Nanoparticlesmentioning

confidence: 99%

Effects of Spherical and Rod-like Gold Nanoparticles on the Reactivity of Human Peripheral Blood Leukocytes

Talarska,

Błaszkiewicz,

Kostrzewa

et al. 2024

Antioxidants

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Gold nanoparticles (GNPs) are widely used in the technological and biomedical industries, which is a major driver of research on these nanoparticles. The main goal of this study was to determine the influence of GNPs (at 20, 100, and 200 μg/mL concentrations) on the reactivity of human peripheral blood leukocytes. Flow cytometry was used to evaluate the respiratory burst activity and pyroptosis in monocytes and granulocytes following incubation with GNPs for 30 and 60 min. Furthermore, the concentration of interleukin-1β (IL-1β) in human blood samples was assessed using enzyme-linked immunosorbent assay (ELISA) after their incubation with GNPs for 24 h. Under the conditions tested in the study, the GNPs did not significantly affect the production of reactive oxygen species in the granulocytes and monocytes that were not stimulated using phorbol 12-myristate 13-acetate (PMA) in comparison to the samples exposed to PMA (p < 0.05). Compared to the control sample, the greatest significant increase in the mean fluorescence intensity of the granulocytes occurred in the samples incubated with CGNPs = 100 and 200 µg/mL for tinc = 30 and 60 min (p < 0.05). From our results, we conclude that the physicochemical properties of the nanoparticles, chemical composition, and the type of nanoparticles used in the unit, along with the unit and incubation time, influence the induced toxicity.

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Fluorescence quenching and energy transfer in a system of hybrid laser dye and functionalized gold nanoparticles

Cited by 11 publications

References 42 publications

Tailoring Fluorescence and Singlet Oxygen Generation of a Chlorophyll Derivative and Gold Nanorods via a Silica Shell

Tailoring Fluorescence and Singlet Oxygen Generation of a Chlorophyll Derivative and Gold Nanorods via a Silica Shell

The Effect of Mixing Nanoparticles on the Suspension Physical Stability

Effects of Spherical and Rod-like Gold Nanoparticles on the Reactivity of Human Peripheral Blood Leukocytes

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