Krystyna Drozdowicz-Tomsia

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We report the use of europium chelate, 4,4'-bis(1'',1'',1'',2'',2'',3'',3''-heptafluoro-4'',6''-hexanedion-6''-yl)chlorosulfo-o-terphenyl-Eu(3+) (BHHCT-Eu(3+)), in silver nanostructure-enhanced luminescence and its application to bioassays and bioimaging. The highest luminescence intensity enhancement factor of BHHCT-Eu(3+) achieved in this study was about(More)
Fluorescence has become one of the key detection methods in genomics, proteomics and cell biology and its applications extend as far as biomedical diagnostics. [ 1–4 ] Advances in this area have been accelerated by the development of new nanotechnology-inspired bioprobes such as quantum dots and silica or polymer encapsulated nanoparticles as well as smart(More)
Measurement of endogenous free and bound NAD(P)H relative concentrations in living cells isa useful method for monitoring aspects of cellular metabolism, because the NADH∕NAD⁺ reduction-oxidation pair is crucial for electron transfer through the mitochondrial electron transport chain. Variations of free and bound NAD(P)H ratio are also implicated in(More)
Rare-earth-doped nanoparticles are promising materials for fluorescent labeling, as they are characterized by a high Stokes shift, narrow emission spectra, long lifetimes, minimized photobleaching, and low toxicity. We examined the structural and optical properties of europium-doped gadolinium oxide nanoparticles synthesized by the flame pyrolysis method,(More)
Electrochemically deposited silver structures with nanowires 50-100 nm in diameter show high fluorescence amplification and strongly reduced fluorescence lifetimes. Both quantities depend on the structure thickness. With increasing thickness the fluorescence amplification proportionally increases and the fluorescence lifetime decreases. This thickness(More)
While the principle of fluorescence enhancement of metal nanostructures is well-known, the utility of this effect in practical methodologies used in analytical laboratories remains to be established. In this work, we explore the advantage of fluorescence enhancement for flow cytometry. We report the observation of metal-enhanced fluorescence emission of(More)
A. Tomaszewska-Grzȩda, W. Ã Lojkowski, M. Godlewskib,c,∗, S. Yatsunenko, K. Drozdowicz-Tomsia, E.M. Goldys and M.R. Phillips Institute of High Pressure Physics (Unipress), Polish Academy of Sciences Warsaw, Poland Institute of Physics, Polish Academy of Sciences al. Lotników 32/46, 02-668 Warsaw, Poland Dept. of Mathematics and Natural Sciences College of(More)
Surface-enhanced spectroscopy is a branch of techniques that enhance light emission from molecules at nanoscale proximity to plasmonic structures. Examples of SES include surface-enhanced fluorescence (SEF), surface-enhanced phosphorescence, surface-enhanced Raman spectroscopy (SERS), surface-enhanced infrared absorption and surface-enhanced(More)
We report the properties of plasmons in dense planar arrays of silver single and double nanostructures with various geometries fabricated by electron beam lithography (EBL) as a function of their size and spacing. We demonstrate a strong plasmon coupling mechanism due to near-field dipolar interactions between adjacent nanostructures, which produces a major(More)
The study of propagating surface plasmons (PSPs) is an important aspect of the understanding of the interaction between light and metallic surfaces. One of the key concepts related to PSPs, is the dispersion relation. This relation is the basis for understanding of coupling of light to PSPs, by using special approaches to match the wavevector. Moreover, it(More)
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