Enhancement effect of terbium complex luminescence by binding to silver nanoparticles in the solution

Wang, Yuehui; Zhou, Ji; Zong, Ruilong; Shi, Shikao; Wang, Ting; Li, Bo

doi:10.1007/bf03033670

Cited by 13 publications

(6 citation statements)

References 17 publications

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“…Due to the physical properties, silver nanoparticles are often used for fluorescence enhancement [75,76]. The phenomenon of fluorescence enhancement may be exploited in photodynamic diagnostics.…”

Section: Metal Nanoparticlesmentioning

confidence: 99%

Nanotechnology for biomedical applications - enhancement of photodynamic activity by nanomaterials

Ulatowska-Jarża¹,

Pucińska²,

Wysocka-Król³

et al. 2011

Bulletin of the Polish Academy of Sciences: Technical Sciences

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Abstract. Over the last two decades nanotechnology has become one of the most dynamically evolving field of research. The unique properties of nanomaterials, not disclosing at microscale, are examined and exploited to extend our understanding of the interactions taking place at atomic or molecular level. Those findings affect research in many areas, like e.g. alternative energy sources, electronics, physics and medicine. In this paper, the possibility of using nanomaterials for the enhancement of photodynamic activity, is discussed. A brief review on drug-delivery facilitating nanomaterials, regarding their characteristic features, is presented. An exemplary application of silver-doped nanomaterials for enhancement of photodynamic properties of two photosensitizers: Photolon and Protoporphyrin IX, is described. Influence of silver-doped nanomaterials addition on the fluorescence intensity of photosensitizers immobilized in silica-titania (SiO2-TiO2) sol was examined via VIS spectroscopy. Influence of sonication on the fluorescence enhancement was also investigated. It was demonstrated that the fluorescence enhancement of photosensitizers depends on the concentration of both: photosensitizer and silver-doped nanoparticles.

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Section: Metal Nanoparticlesmentioning

confidence: 99%

Nanotechnology for biomedical applications - enhancement of photodynamic activity by nanomaterials

Ulatowska-Jarża¹,

Pucińska²,

Wysocka-Król³

et al. 2011

Bulletin of the Polish Academy of Sciences: Technical Sciences

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“…When the colloidal solution of Ag NPs was added to the Eu 3+ -NAP complex, the local refractive index around the complex may have been changed, leading to the modification of the electric dipole transition rate. The colloidal solution concentration of more than 0.7 mmol L −1 may have distorted the local field arising from the self interaction of plasmon electrons of Ag NPs [31]. This effect may have resulted in the quenching of luminescence intensity.…”

Section: Effect Of Ag Np Concentrationmentioning

confidence: 99%

Silver Nanoparticle-Enhanced Chemiluminescence Method for Determining Naproxen Based on Europium(III)-Sensitized Ce(IV)-Na2S2O4 Reaction

et al. 2012

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A simple and sensitive chemiluminescence (CL) method coupled with flow-injection technique is proposed to determine naproxen (NAP). The method is based upon the enhancement of the weak CL signal arising from the reaction of Ce(IV) and Na(2)S(2)O(4) with Eu(3+) to form the Eu(3+)-Ce(IV)-Na(2)S(2)O(4) system. The CL intensity was significantly increased by the introduction of NAP into this system in the presence of silver nanoparticles (Ag NPs). Examination of the recorded UV-vis spectra and fluorescence spectra indicated that the energy of the intermediate SO(2)*, which originated from the redox reaction of Ce(IV) and Na(2)S(2)O(4), was transferred to Eu(3+) via NAP and that the process was accelerated by Ag NPs due to their catalytic activity. Under the optimum conditions, the CL intensity was increased with increasing NAP concentration and the correlation was linear (r = 0.9992) over the NAP concentration range of 1-420 ng mL(-1). The limit of detection (LOD) was 0.11 ng mL(-1) with a relative standard deviation (RSD) of 1.15% for 5 replicate determinations of 200 ng mL(-1) NAP. The method was successfully applied to determine NAP in pharmaceutical and biological samples.

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“…A colloidal solution concentration of more than 1 15 × 10 −4 M may distort the local field arising from the self-interaction of plasmon electrons of Ag NPs. 34 This effect might have quenched the luminescence intensity. The maximized enhancement efficiency for the 1 15× 10 −4 M colloidal solution may thus be attributed to a delicate balance between the enhancement and quenching effect.…”

Section: Optimization Of Reaction Parametersmentioning

confidence: 99%

Silver Nanoparticles Enhanced Luminescence of Terbium Complex in Solution for L-Dopa Determination

Alam¹,

Kamruzaman²,

Lee³

et al. 2012

j nanosci nanotechnol

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Luminescent properties of a terbium (Tb3+)-L-3, 4-dihydroxyphenylalanine (L-dopa) complex by binding to colloidal silver nanoparticles (Ag NPs) have been presented. Luminescence intensity of the L-dopa complex was dramatically enhanced about 6-7 times by introducing Ag NPs. The Ag NPs concentration on the luminescent intensity was regarded as a main factor that balancing between an enhancing and a quenching effect of the Ag NPs. It was observed that changing the concentration of L-dopa causes the change in luminescence intensity. Under the optimized condition, the luminescence intensity of the system was linearly related to the concentration of L-dopa. Based on this observation, L-dopa-Tb3+ complex containing Ag NPs has been applied for the determination of L-dopa in pharmaceutical formulation. Linear responses of luminescence intensity were observed in the concentration range of 0.25 to 1.5 nM (r = 0.9934) of L-dopa with limit of detection 0.042 nM. The performance of the system was tested using 1.0 x 10(-9) M of L-dopa, yielding a precision of 1.21% RSD for nine replicate measurements. The present method has been successfully applied to determine L-dopa in pharmaceutical samples.

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Enhancement effect of terbium complex luminescence by binding to silver nanoparticles in the solution

Cited by 13 publications

References 17 publications

Nanotechnology for biomedical applications - enhancement of photodynamic activity by nanomaterials

Nanotechnology for biomedical applications - enhancement of photodynamic activity by nanomaterials

Silver Nanoparticle-Enhanced Chemiluminescence Method for Determining Naproxen Based on Europium(III)-Sensitized Ce(IV)-Na2S2O4 Reaction

Silver Nanoparticles Enhanced Luminescence of Terbium Complex in Solution for L-Dopa Determination

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