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| 1 | Synthesis, structural and spectroscopic studies on GdBO_3:Yb^(3+)/Tb^(3+)@SiO_2 core-shell nanostructures显示文摘The presented study concerned up-converting core/shell type nanomaterials based on lanthanide(Ⅲ) ions, Ln(Ⅲ), doped orthoborates. The system studied composed of the GdBO3 doped with Yb3+/Tb3+ luminescent core ensured an effective cooperative sensitization up-conversion, resulting in a bright green luminescence. The silica coating process was performed by a modified St?ber method, which resulted in the formation of core-shell nanostructures, making them suitable for bioapplications. The nanophosphors and nanocomposites were obtained by various methods, such as co-precipitation in the presence of Triton X-100 and micelle synthesis with ethylenediaminetetraacetic acid(EDTA) as organic modifiers/surfactants. The synthesized nanomaterials were characterized with the use of powder X-ray diffraction(XRD), infrared light absorption with Fourier transform FT-IR spectra, transmission electron microscopy(TEM), up-conversion emission spectra under IR light, as well as excitation spectra, emission spectra and fluorescence lifetimes under UV light, and their photophysical properties were compared. | Konrad Kubasiewicz Marcin Runowski Stefan Lis Agata Szczeszak | 2015 | Journal of Rare Earths2015，33，11： | 2 |
| 2 | Synthesis of luminescent KY_3F_(10) nanopowder multi-doped with lanthanide ions by a co-precipitation method显示文摘A series of KY_3F_(10) nanophosphors doped with Gd^(3+), Ce^(3+) and Eu^(3+) ions were obtained with the use of a co-precipitation method. The resulting products were white precipitates, consisting of spherical particles with diameter about 150–200 nm, which was confirmed using transmission electron microscopy(TEM) technique. Powder X-ray diffraction(XRD) and energy dispersive X-ray analysis(EDX) measurements confirmed appropriate structures of the nanoparticles obtained. Spectroscopic properties of the products were examined on the basis of the measured excitation/emission spectra and luminescence decay curves. The synthesized samples showed orange-red luminescence, characteristic for Eu^(3+) ions. The reaction process was performed in required alkaline pH adjusted with the use of ethylenediaminetetraacetic acid(EDTA) and potassium hydroxide. The samples containing large amounts of Gd^(3+) dopant ions exhibited a tendency to form products with different morphologies. | Szymon Goderski Marcin Runowski Stefan Lis | 2016 | Journal of Rare Earths2016，34，8： | 2 |
| 3 | Nanocrystalline rare earth fluorides doped with Pr^(3+) ions显示文摘Praseodymium(Ⅲ) doped CeF_3, CeF_3:Gd, LaF_3, GdF_3 and YF_3 inorganic fluorides were precipitated in an aqueous, surfactant-free solution, using NH_4 F as a source of fluoride ions. The as-prepared products were subjected to a hydrothermal treatment, which led to the formation of crystalline nanoluminophores, composed of spherical(≈30 nm) and elongated(≈40–200 nm) nanostructures. Due to the presence of Pr^(3+) ions, the synthesized nanomaterials showed yellow luminescence under a blue light irradiation. The nanoluminophore based on the YF_3 host revealed the most promising spectroscopic properties, i.e., bright and intensive emission, hence it was investigated in detail. The photophysical properties of the nanomaterials obtained were studied by powder X-ray diffraction(XRD), transmission electron microscopy(TEM) and spectrofluorometry, i.e., measurements of excitation/emission spectra and luminescence decay curves. | Marcin Runowski Stefan Lis | 2016 | Journal of Rare Earths2016，34，8： | 1 |
| 4 | Luminescent-plasmonic core-shell microspheres,doped with Nd3+ and modified with gold nanoparticles,exhibiting whispering gallery modes and SERS activity显示文摘Multifunctional core/shell type,luminescent-plasmonic material composed of lanthanide doped microspheres(≈50μm)and gold nanoparticles(Au NPs;≈10-20 nm)deposited onto their surface,were successfully prepared(Nd^3+:YAS@Au).The material was synthesized to combine the luminescence properties of the Nd^3+-doped microspheres,i.e.whispering resonance with plasmonic activity of the surface Au NPs,i.e.surface enhanced Raman scattering(SERS)effect,within a single,micro-sized material.The luminescent-plasmonic microspheres were used as the active SERS substrate for detection of the organic probe,and for generation of Whispering Gallery Modes(WGM),which red-shift together with increasing laser power(temperature elevation).The products obtained were analysed with optical,scanning and transmission electron microscopy(SEM and TEM),as well as by Raman,absorption and photoluminescence spectroscopies. | Marcin Runowski Inocencio R.Martin Vladimir N.Sigaev Vitaliy I.Savinkov Georgiy Yu.Shakhgildyan Stefan Lis | 2019 | Journal of Rare Earths2019，37，11： | 0 |
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