Institution
Kazimierz Wielki University in Bydgoszcz
Education•Bydgoszcz, Poland•
About: Kazimierz Wielki University in Bydgoszcz is a education organization based out in Bydgoszcz, Poland. It is known for research contribution in the topics: Population & Luminescence. The organization has 1109 authors who have published 2923 publications receiving 19548 citations. The organization is also known as: Casimir the Great University & Uniwersytet Kazimierza Wielkiego w Bydgoszczy.
Topics: Population, Luminescence, Seta, Fuzzy number, Photoluminescence
Papers published on a yearly basis
Papers
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TL;DR: In this article, the effect of particle size and cross-section size on the tensile and flexural properties of wood-polyvinyl chloride (PVC) composites was investigated.
Abstract: Wood-polyvinyl chloride (PVC) composites were prepared using industrial wood particles used for manufacturing three-layer particleboards. The effect of particle size (0.25–0.5, 0.5–1, 1–2, and 2–4 mm) on the mechanical properties of the composites was investigated. The effect of cross-section size (4×10, 6×15 and 8×20 mm2) of composite pieces made by an injection moulding method was also studied. Both the particle size and specimen cross-section area significantly influenced these properties. The tensile and flexural properties as well as the impact strength in general increased with increasing particle size, and decreased with increasing cross-section size.
42 citations
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TL;DR: In this paper, a systematic study of the leading isotropic van der Waals coefficients for the alkali-metal atom+molecule and molecule+molescule systems is presented.
Abstract: A systematic study of the leading isotropic van der Waals coefficients for the alkali-metal atom+molecule and molecule+molecule systems is presented. Dipole moments and static and dynamic dipole polarizabilities are calculated employing high-level quantum chemistry calculations. The dispersion, induction, and rotational parts of the isotropic van der Waals coefficient are evaluated. The known van der Waals coefficients are then used to derive characteristics essential for simple models of the collisions involving the corresponding ultracold polar molecules.
42 citations
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TL;DR: In this paper, single crystalline films (SCFs) of undoped and Ce3+ doped Y2SiO5 (YSO) and LSO:Ce orthosilicates were crystallized for the first time by liquid phase epitaxy method onto undoped YSO substrates from melt-solution based on PbO-B2O3 flux.
42 citations
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TL;DR: In this paper, the modification induced in polystyrene (PS) by the ArF excimer laser radiation has been investigated, and various numbers of the laser pulses of the energies below the material ablation threshold were applied.
41 citations
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TL;DR: In this paper, the effect of high-pressure absorption and luminescence quenching on cerium dopants was analyzed in terms of two possible phenomena: (i) pressure-induced electronic crossover of the excited 5$d$ energy level with the conduction band bottom of the host crystal, and (ii) decrease of electron-lattice coupling with increasing pressure, resulting in reduction of the Stokes shift and non-radiative transitions between the low vibrational levels of the ground 4$f$ state.
Abstract: Studies of the spectroscopic properties of Ce${}^{3+}$ dopant in bulk Gd${}_{3}$Ga${}_{5}$O${}_{12}$:Ce crystal under pressure are presented. In spite of strong intershell $4f\ensuremath{\rightarrow}5d$ absorption bands at ambient pressure, the cerium luminescence in Gd${}_{3}$Ga${}_{5}$O${}_{12}$ is entirely quenched even at low temperature. It has been shown that applying pressure allows for recovery of the $5d\ensuremath{\rightarrow}4f$ radiative transitions. Further increase of pressure improves the emission efficiency. This effect is analyzed in terms of two possible phenomena: (i) by pressure-induced electronic crossover of the excited 5$d$ energy level of the Ce${}^{3+}$ with the conduction band bottom of the host crystal, and (ii) by decrease of electron-lattice coupling with increasing pressure, resulting in reduction of the Stokes shift and nonradiative transitions between the low vibrational levels of the 5$d$ state and high vibrational levels of the ground 4$f$ state. The results of high-pressure absorption and luminescence measurements point out that the ambient-pressure luminescence quenching is caused by the donor-like charge transfer processes due to the resonant location of the Ce${}^{3+}$ 5$d$ electronic levels with respect to the host conduction band. In such a situation, the ionization of Ce${}^{3+}$ to Ce${}^{4+}$ occurs, accompanied by large lattice relaxation, which enables the nonradiative recombination to the Ce 4$f$ state. The pressure-induced approach of the conduction-band bottom of the host crystal by the excited 5$d$ energy level of the Ce${}^{3+}$ results in mixing between conduction band states and the 5$d$ state, and the broadband luminescence from this mixed state is observed at pressures from 30 up to about 60 kbar. Then, for pressures exceeding 60 kbar, this luminescence is replaced by the classic ${\mathrm{Ce}}^{3+}\phantom{\rule{0.16em}{0ex}}5d\ensuremath{\rightarrow}4f$ transitions. Using a simple anticrossing model and configuration coordinate model in the appropriate pressure range, quantitative description of the system has been carried out, and the pressure-induced decrease of electron-lattice coupling has been shown.
41 citations
Authors
Showing all 1123 results
Name | H-index | Papers | Citations |
---|---|---|---|
Yasser Khazaal | 36 | 230 | 5587 |
Yu. Zorenko | 30 | 171 | 3119 |
Andrzej Suchocki | 30 | 278 | 3359 |
Piotr Jaśkowski | 27 | 53 | 1857 |
V. Gorbenko | 26 | 110 | 2175 |
Sergii Iermakov | 26 | 154 | 1966 |
Jaroslaw Burczyk | 26 | 71 | 2539 |
Aleksandra Szczepankiewicz | 24 | 109 | 1909 |
Filip Pawłowski | 23 | 59 | 2602 |
Piotr Boguslawski | 22 | 74 | 2505 |
Adam Boratyński | 22 | 101 | 1314 |
Sergey Chalov | 21 | 103 | 1492 |
Mariusz Kaczmarek | 20 | 163 | 1750 |
Marian Żenkiewicz | 20 | 68 | 1477 |
Witold Kosiński | 20 | 109 | 1382 |