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1

Piany luminescencyjne – opracowanie technologii autorskiej

Majsiak Lena, Mazurczyk Wiktoria

Szkło i Ceramika

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2025

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R. 76, nr 3

47--55

PL

Opisana technologia pian luminescencyjnych jest wynikiem połączenia dwóch indywidualnie opracowanych technologii. Autorskie szkliwa luminescencyjne umożliwiają wytwarzanie obiektów ceramicznych stosowanych jako alternatywne źródło światła, zaś piany ceramiczne to materiały o właściwościach dźwiękochłonnych, podlegające wielokrotnemu recyklingowi. Wykonanie wspólnego tworzywa podyktowane było celem uzyskania kombinacji właściwości obu tych autorskich materiałów i poszerzenia tym samym obszaru badań i możliwości przyszłych zastosowań. Niniejszy artykuł przybliża specyfikę zagadnień związanych z luminescencją i pianami ceramicznymi oraz opisuje wspólnie opracowaną technologię i towarzyszącą jej drogę badawczą.

EN

The described luminescent foam technology is the result of combining two individually developed technologies. Luminescent glazes enable the production of ceramic objects used as an alternative light source, while ceramic foams are materials with sound-absorbing properties that can be recycled multiple times. The realization of a joint material was motivated by the goal of combining the properties of both original materials and thus expanding the area of research and possibilities for future applications. This article introduces the specifics of issues related to luminescence and ceramic foams and describes the collaboratively developed technology and the accompanying research path.

2

Optimization of optical filters configuration for signals separation in OSL dosimetry

Bolek Karol, Fornalski Krzysztof, Przychodzki Maciej, Wyrwas Krzysztof, Rutkowska Katarzyna, Sobotka Piotr

Przegląd Elektrotechniczny

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2025

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R. 101, nr 8

120--125

EN

The design of the spectral filtering system for optical signals emitted by optically stimulated dosimeters is a key element in developing and advancing passive dosimetry readout techniques. This paper presents the optimization method of filters configuration (i.e., filters set) that enhances the separation between the stimulating optical signal and the luminescence signal emitted by the dosimeter, which is critical for improving measurement efficiency. The proposed solution maximizes the ratio between the desired and stimulating signal, while minimizing the number of optical filters used.

PL

Projektowanie układu filtracji spektralnej sygnałów optycznych pochodzących z optycznie stymulowanych dozymetrów stanowi kluczowy element w rozwoju i doskonaleniu technik odczytu dozymetrów pasywnych. W niniejszej pracy opisano metodę optymalizacji układu filtrów optycznych, która umożliwia skuteczne rozdzielenie sygnału stymulującego od sygnału luminescencji emitowanego przez dozymetr, co ma istotne znaczenie dla poprawy efektywności pomiaru. Zaproponowane rozwiązanie pozwala na osiągnięcie maksymalnego stosunku sygnału pożądanego do sygnału stymulującego, przy jednoczesnym ograniczeniu liczby zastosowanych filtrów optycznych.

3

Workability and Performance Testing of Alkali-Activated Luminescent Composite

Boháčová Jana, Procházka Lukáš, Khestl Filip, Hulvová Lucie

Inżynieria Mineralna

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2025

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Vol. 2, no. 2

art. no. 52

EN

This study was focused on the development and testing of luminescent composite based on alkali-activated granulated blast furnace slag. The composite was intended for use as a secondary luminescent layer of visual safety elements in transport infrastructure applications. The evaluation included compressive and flexural strengths, adhesion to different substrates (concrete and asphalt), slip resistance, bulk density, and fresh mortar consistency. The results show that the compressive and flexural strengths, as well as slip resistance, are sufficient for intended application. Experiments also revealed unexpectedly long initial and final setting times and relatively low adhesion values, which may pose challenges for the proposed use. Further research in terms of durability is needed. For use in traffic engineering, future testing should include frost resistance and resistance to de-icing agents.

4

Development of Alkali-Activated Luminescent Composite

Boháčová Jana, Procházka Lukáš, Khestl Filip, Chupáč Patrik

Inżynieria Mineralna

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2025

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Vol. 2, no. 2

art. no. 8

EN

Alkali-activated materials are the alternative binders in which latent hydraulic materials or pozzolans are used as the main binder component. Luminescence is a process in which atoms or molecules are excited and emit light. This phenomenon is used in the construction industry, mainly in safety, lighting, and design. These materials are often used as paint or spray as a safety element to mark escape routes, staircases, etc. They are also used for decorative purposes, for example, in luminescent concrete, where the luminescent component is often contained as aggregate. The experiment was focused on testing the possibility of preparing a luminescent material based on alkali-activated granulated blast furnace slag, where the luminescent pigment is applied as part of the binder component. The experiment compared the luminescent properties of the created mixture with cement-based materials and subsequently verified the rheological and physical-mechanical properties of the prepared composites. It was found that a luminescent alkali-activated composite can be prepared, but the influence of the luminescent pigment on the final properties, especially the flexural and compressive strength, where a significant decrease in the monitored parameters was recorded, must be taken into account.

5

Wpływ budowy związku elektroaktywnego na właściwości luminescencyjne i elektrochromowe

Muras Kacper

Wiadomości Chemiczne

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2024

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[Z] 78, 11-12

1467--1492

EN

This study investigates the relationship between the structure of organic compound and their electrochemical and optical properties, with a particular focus on donor-acceptor structures. Organic electronics, an emerging field with historical roots date back to discovery of organic semiconductors in the mid-20th century, offers notable advantages over traditional silicon-based electronics. That advantages include flexibility, lightweight, lower cost and the potential for large-area production. Based on the analysis of organic compounds, I have attempted to elucidate the relationship between the structure and optical and electrochemical properties of organic compounds. Donor-acceptor systems are known for their ease of charge transfer, which is crucial for enhancing both electrochromic and luminescent properties. Our research shows that even minor changes in structure can lead to significant variation in electrochromic and luminescent properties. This research not only increase our knowledge about fundamental principles governing organic electronics, but also paves the way for the development of advanced materials with tailored properties for application in flexible displays, smart windows, smart glasses and a organic light-emitting diodes (OLED’s). The potential inherent in organic electronics encourages ongoing exploration of new electroactive organic compounds and the dynamic development of knowledge regarding the relationship between the structure and properties of such molecules.

6

Dysproz : pierwiastek ziem rzadkich o wysokim potencjale aplikacyjnym

Czajka Justyna

Wiadomości Chemiczne

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2024

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[Z] 78, 11-12

1565--1584

EN

The modern world is based on dynamically evolving technologies, in which rare earth elements play a significant role. This group of seventeen chemical elements, due to their unique chemical and physical properties, is crucial for the development of the most advanced industrial sectors. Rare earth metals, also known as rare earth elements (REE), have gained the status of strategic resources in the last two decades. Despite their small market share compared to other mining and metallurgy products, they are considered critical resources both in the European Union and in the United States. From the wide range of rare earth elements and the numerous advantages they bring, this work focuses on dysprosium. Starting with its historical background, presenting its chemical and physical properties, and ending with a review of the latest scientific articles. In recent years, understanding and characterizing the spectroscopic properties of dysprosium ions has become a subject of research for many groups of scientists worldwide. There has been a growing trend of interest in this rare earth element, as evidenced by literature reports in prestigious international journals. Dy3+ ions are often used as dopants in the production of modern inorganic phosphors, which are chemical compounds that emit light upon excited. This work will show the significant importance of using dysprosium-ion-doped phosphors, glasses, or quantum dots in many areas of science and industry. It emphasizes the crucial role dysprosium has played in the development of electroluminescent diodes, solar cells, sensors, optoelectronic devices, as well as in biomedicine, forensics and anti-counterfeiting applications.

7

Exosome-hydrogels loaded with metal-organic framework improve skin aging by inhibiting oxidative stress

Li Li-Jie, Han Qing-Ling, Feng Wen-Jie, Wang Zhan-Peng, Li Hong-Hua

Polish Journal of Chemical Technology

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2024

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Vol. 26, nr 2

42--47

EN

Solvothermal reactions of Ba(NO3)2 with 1,3,5-benzenetricarboxylic acid gave rise to a new coordination polymer of [Ba6(BTC)4(H2O)9]}n (1 H3BTC = benzenetricarboxylic acid). The complex 1 was characterized soundly by Fourier transform infrared (FT-IR) spectroscopy, elemental analysis (EA), single-crystal X-ray diffraction (SCXRD), and thermogravimetric analysis (TGA). The framework of 1 has high thermal stability and shows intense luminescence at room temperature. Hyaluronic acid (HA) and carboxymethyl chitosan (CMCS) have good biocompatibility, based on the chemical synthesis method, the HA/CMCS hydrogel was prepared. With exosomes as drug models, we further synthesized novel exosome-loaded metal gel particles and evaluated their effects on oxidative stress in human dermal fibroblasts.

8

Sondy fluorescencyjne jako czujniki biomolekuł

Szwaczko Katarzyna

Laboratorium - Przegląd Ogólnopolski

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2024

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nr 1

47--51

PL

Sondy luminescencyjne znajdują zastosowanie w różnych dziedzinach medycyny, takich jak: obrazowanie molekularne, badania nad chorobami, diagnostyka i monitorowanie procesów biologicznych. Dzięki swojej zdolności do precyzyjnego oznaczania i obrazowania różnych składników lub procesów w organizmach stanowią cenne narzędzie w badaniach laboratoryjnych i klinicznych. W niniejszym artykule zostanie przedstawiony potencjał obrazowania luminescencyjnego w diagnostyce schorzeń związanych z niewłaściwym poziomem związków tiolowych w komórkach.

EN

Luminescent probes are used in various medical fields, such as molecular imaging, research on diseases, diagnostics, and monitoring of biological processes. With their ability to accurately determine and image various components or processes in organisms, they are a valuable tool in laboratory testing and clinical research. This article presents the potential of luminescence imaging in the diagnosis of diseases associated with inappropriate levels of thiol compounds in cells.

9

Review of X-ray detection systems

Urbański Paweł, Grzebyk Tomasz

Opto-Electronics Review

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2023

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Vol. 31, No. 3

art. no. e146554

EN

The article presents an overview and a classification of X-ray detection methods. The main motivation for its preparation was the need to select a suitable and useful method for detecting signals from a currently developed miniature micro-electro-mechanical system (MEMS) X-ray source. The described methods were divided into passive and active ones, among which can be distinguished: chemical, luminescent, thermo-luminescent, gas ionization, semiconductor, and calorimetric methods. The advantages and drawbacks of each method were underlined, as well as their usefulness for the characterisation of the miniature MEMS X-ray source.

10

Klasyczne i nowoczesne spojrzenie badawcze na procesy hydratacji cementów glinowo-wapniowych

Madej Dominika, Kruk Andrzej

Cement Wapno Beton

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2023

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R. 28, nr 5

318--338

PL

Cementy glinowo-wapniowe [CAC] ze względu na ich unikalne właściwości stosowane są zazwyczaj w konstrukcjach odlewanych w miejscu instalacji oraz w aplikacjach wysokotemperaturowych. Klinkier cementowy CaAl2O4 [CA] oraz klinkier domieszkowany jonami Sm [CA:Sm], otrzymano metodą klasyczną i scharakteryzowano za pomocą proszkowej dyfrakcji rentgenowskiej [XRD], skaningowej mikroskopii elektronowej [SEM] wraz z spektroskopią rentgenowską z dyspersją energii [EDS] oraz spektroskopią luminescencyjną. Analiza dyfraktometryczna ujawniła obecność wyłącznie fazy CaAl2O4. Następnie, klasycznymi metodami badawczymi prześledzono postęp hydratacji obu cementów, w tym kalorymetrii izotermicznej, XRD, SEM oraz technikami najnowocześniejszymi: czasowo rozdzielczą elektrochemiczną spektroskopią impedancyjną [TR-EIS] oraz spektroskopii fotoluminescencyjnej [PS]. Badania TR-EIS przeprowadzono za pomocą Kamery Impedancyjnej w zakresie częstotliwości od 100 Hz do 1 MHz. Ewolucja uzyskanych widm impedancyjnych i widm luminescencyjnych z łatwością wskazała początek formowania nowej fazy stałej oraz kolejnych etapów hydratacji. Dynamikę procesu hydratacji skutecznie zobrazowano poprzez śledzenie zmian intensywności widma luminescencyjnego jonów Sm3+. Obie techniki są ze sobą komplementarne i spójne z klasycznymi metodami badawczymi stosowanymi w chemii cementu, zwłaszcza w badaniach m.in. hydratacji cementów portlandzkich i innych spoiw.

EN

Calcium aluminate cements [CACs] are typically used for cast-in-place structural work and high temperature applications due to their unique properties. The CaAl2O4 [CA] and Sm-doped CaAl2O4 [CA:Sm] cement clinkers obtained by the solid-state reaction were investigated using X-ray powder diffraction [XRD], scanning electron microscopy [SEM] and energy dispersive X-ray spectroscopy [EDS] and luminescence spectroscopy. The XRD result shows that the powders are pure CaAl2O4. As a next step, hydration behavior of as-synthesized cements was investigated by both classical methods including isothermal calorimetry and XRD, and the state-of-the-art techniques including time resolved electrochemical impedance spectroscopy [TR-EIS] and luminescence spectroscopy. The TR-EIS investigations were obtained by the Impedance Camera over the range of 100 Hz to 1 MHz frequencies. The evolution of obtained EIS and luminescence spectra easily manifested the beginning of the new solid formation and the hydration kinetics. The dynamics of hydration processes were also successfully traced by the changes of the luminescence intensity from the Sm3+ ions. This technique seems to be complementary, and consistent with other methods implemented in the cement chemistry, especially to investigate e.g. hydration of ordinary Portland cements [OPCs] and other binders.

11

Wieloskładnikowe szkła tytanowo-germanianowe dla podczerwonej fotoniki

Kowalska Karolina, Kuwik Marta, Pisarska Joanna, Dorosz Dominik, Pisarski Wojciech A.

Przegląd Elektrotechniczny

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2022

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R. 98, nr 9

186--189

PL

W pracy omówiono wieloskładnikowe szkła tytanowo-germanianowe domieszkowane pojedynczo jonami Nd3+, Er3+, Tm3+ i Ho3+. Określono wpływ składnika TiO2 na właściwości luminescencyjne w zakresie bliskiej podczerwieni jonów lantanowców w szkłach barowo-galowogermanianowych. Intensywność luminescencji jonów lantanowców jest wzmocniona w wyniku obecności TiO2. Wyniki badań luminescencyjnych szkieł są obiecujące pod kątem potencjalnych zastosowań w podczerwonej fotonice.

EN

In this work, multicomponent titanate-germanate glasses singly doped with Nd3+, Er3+, Tm3+ and Ho3+ ions are discussed. The influence of TiO2 component on the near-infrared luminescent properties of lanthanide ions in barium-gallo-germanate glasses was determined. Luminescence intensities of lanthanide ions are enhanced in the presence of TiO2. Luminescent results for the studied glasses are promising in relation to potential applications in the infrared photonics.

12

Dozymetria luminescencyjna: przegląd metod, detektorów i ich zastosowań

Nowina Konopka Małgorzata, Bilski Paweł, Obryk Barbara, Marczewska Barbara, Olko Paweł, Kłosowski Mariusz, Gieszczyk Wojciech

Postępy Techniki Jądrowej

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2022

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z. 3

8--16

PL

W artykule, po krótkim opisie rozwoju historycznego, przedstawiono teorię termoluminescencji (TL). Omówiono i porównano trzy metody stymulowania luminescencji termiczną (TSL), optyczną (OSL) i radiową (RPL). Przedstawiono i opisano szeroki zakres zastosowań detektorów TL w dozymetrii indywidualnej i środowiskowej z naciskiem na pomiary ultrawysokich dawek. Jako szczególnie ważne w dozymetrii klinicznej do radioterapii nowotworów oka, opracowano termoluminescencyjne detektory planarne 2D. Opisano udział zespołu z Instytutu Fizyki Jądrowej (IFJ) w kosmicznym eksperymencie MATROSHKA. Przedstawiono również nowe materiały TL i nowe metody pomiarowe.

EN

In the paper, after a brief description of historical development, the theory of thermoluminescence (TL) is presented. Three methods of thermally (TSL), optically (OSL) and radio (RPL) stimulated luminescence are discussed and compared. A wide range of applications of TL detectors in individual and environmental dosimetry with an attention put on ultra-high dose measurements is presented and described. As particularly important in clinical dosimetry for eye-tumor radiotherapy, the planar 2D detectors TL were developed. The participation of the Institute of Nuclear Physics (IFJ) group in the Cosmos MATROSHKA experiment is described. Also, the new TL materials and measurement methods are presented.

13

Wpływ pigmentów luminescencyjnych na trwałość systemu powłokowego

Michalski Marek, Szczepaniak Marcin

Obróbka Metalu

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2022

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Nr 4

37--41

PL

W artykule przedstawiono rezultaty badań dotyczących cech użytkowych powierzchni pokrytych powłokami, przy czym nanoszenie powłok przyjęto jako jeden z rodzajów obróbki przyrostowej. Analizowano wpływ obecności i sposobu dozowania pigmentów na trwałość nanoszonych powłok w systemach transportowych.

EN

In this paper the results of a study on the performance characteristics of coated surfaces was presented, where coating was chosen as a type of additive treatment. Analysis of the influence of pigments and dosage on the durability of the coatings applied In transport systems was carried out.

14

Datowanie luminescencyjne. Konstrukcja napromieniacza do weryfikacji efektu mocy dawki

Mandowski Arakdiusz, Mandowska Ewa, Smyka Robert, Majgier Renata, Szufa Katarzyna, Maternicki Krzysztof

Przegląd Elektrotechniczny

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2021

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R. 97, nr 2

24--27

PL

Znając wartość naturalnego tła promieniowania można sposób datować materiały archeologiczne i geologiczne metodami luminescencyjnymi. Szacujemy wiek porównując dawkę naturalną z dawką laboratoryjną. Moce tych dawek różnią się o wiele rzędów wielkości. Nie wiadomo, czy takie porównanie jest uzasadnione. W artykule przedstawiono wyniki teoretyczne i doświadczalne dotyczące efektu mocy dawki oraz koncepcję kontrolowanego elektronicznie napromieniacza do testowania tego efektu.

EN

Knowing the value of the natural radiation background, it is possible to estimate the age of archaeological and geological materials using luminescence methods. We estimate the age by comparing the natural dose with the laboratory one. The dose rates for these two cases doses may fiffer by many orders of magnitude. It is not known whether such a comparison is justified. The article presents theoretical and experimental results concerning the dose rate effect as well as the concept of an electronically controlled irradiator to test this effect.

15

Luminescencyjne datowania w badaniach geoarcheologicznych

Kalicki Tomasz, Głuszewski Wojciech, Frączek Marcin, Przepióra Paweł

Postępy Techniki Jądrowej

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2021

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z. 3

34--41

PL

W artykule omówiono wyniki kilku interdyscyplinarnych geologicznych datowań wykonanych metodami optycznymi. Wiek starszych osadów, głównie plejstoceńskich określono za pomocą termoluminescencji (TL). Młodsze holoceńskie osady datowano z wykorzystaniem optycznie stymulowanej luminescencji (OSL). Na przykładzie osadów mineralnych zawierających kwarc wyjaśniono podstawy obu technik datowania. Często są one stosowane naprzemiennie, w zależności od materiału i jego szacowanego wieku. Metoda OSL rekomendowana jest do badania próbek na stanowiskach archeologicznych. W obu technikach analitycznych mierzy się wielkości dawek pochłoniętych naturalnego promieniowania jonizującego. Zwrócono uwagę na znaczenie laboratoryjnych źródeł promieniowania gamma w wyznaczaniu krzywych kalibracji.

EN

The article discusses the results of several interdisciplinary studies on the dating of geological sediments with optical methods. The age of older sediments, mainly Pleistocene ones, was determined by thermoluminescence (TL). Younger Holocene sediments were dated using optically stimulated luminescence (OSL). The basics of both methods of dating sediments containing quartz are explained. The OSL method is successfully used to determine the age of mineral sediment in archaeological sites. The basis of both analytical techniques is the measurement of the amount of absorbed doses of natural ionizing radiation. Also the importance of laboratory gamma radiation sources used for the determination of calibration curves has been emphasized.

16

Luminescence characteristics of intraplate-derived olivines

Clark-Balzan Laine, May Venera R., Preusser Frank

Geochronometria

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2021

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Vol. 48, no.1

73--94

EN

Olivine has so far attracted limited attention as a potential luminescence dosimeter. In particular, there is a dearth of information concerning the luminescence properties of geochemically characterised, pure olivine samples. Six well-characterised olivine samples from four intraplate settings are investigated in this study, including emission wavelengths and intensities, growth of signal with absorbed dose, signal stability and recovery of a given dose with a single aliquot regeneration (SAR) protocol. All tested olivines share a low-temperature (90–100°C) UV/blue thermoluminescence (TL) peak, and five of six samples also produce a low-temperature red/yellow emission. Higher temperature TL peaks, which would be thermally stable over geological timescales and could be used for dating, are rarely observed at low doses (c. 46 Gy), but detectable though dim at significantly higher doses (c. 460 Gy). Photostimulated luminescence (PSL) emissions are very dim, but reliably detected emissions are stimulated by blue, yellow and infrared (IR) light. PSL yielded generally successful dose recovery results; however, all tested signals are prone to significant anomalous fading and complex thermal transfer between unbleachable and bleachable traps. These characteristics must be addressed if olivine is to be used as a natural dosimeter for luminescence dating. Given the variety of luminescence responses, it appears that olivine samples in future dating work may need to be individually characterised prior to measurement.

17

Investigations on the luminescence properties of quartz and feldspars extracted from loess in the Canterbury Plains, New Zealand South Island

Brezeanu D., Avram A., Micallef A., Cinta Pinzaru S., Timar-Gabor A.

Geochronometria

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2021

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Vol. 48, no.1

46--60

EN

The applicability of the single-aliquot regenerative-dose (SAR) protocol, by using the optically stimulated luminescence (OSL) signal of quartz as well as the post-infrared–infrared (pIRIR) signals of polymineral fine grains, namely pIRIR225 and pIRIR290, was assessed for dating loess in New Zealand South Island. OSL signals of quartz grains displayed low sensitivity. However, the application of repeated irradiation/bleaching cycles did not result in an increase in sensitivity; annealing in the 300–500°C temperature range generated the sensitisation of both the 110°C thermoluminescence (TL) peak as well as the OSL signal, likely by activation of yet unidentified luminescence centres. After heating, the quartz signal is comparable to that of ideal samples, but the annealing is precluding successful dating. On the other hand, feldspar infrared-stimulated signals displayed satisfactory properties, allowing estimation of ages ranging from 14 ± 1–29 ± 3 ka for the investigated deposit. It was shown that pIRIR225 and pIRIR290 methods have potential for dating loess in the South Island of New Zealand, based on the following observations: (i) Dose recovery tests were successful with recovered-to-given dose ratios with a <10% deviation from unity, (ii) constant residual values of about 4 Gy and about 10 Gy were obtained after exposures for 48 h in the case of pIRIR225 signals and 96 h in the case of pIRIR290 signals, respectively, (iii) while a slight dose-dependence of the residual was reported, and for a dose as large as 1600 Gy the residual values are ≅9 Gy and ≅19 Gy for pIRIR225 and pIRIR290 signals, respectively.

18

Parallel, multi-purpose Monte Carlo code for simulation of light propagation in segmented tissues

Wojtkiewicz Stanislaw, Liebert Adam

Biocybernetics and Biomedical Engineering

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2021

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Vol. 41, no. 4

1303--1321

EN

We have developed a massive-parallel, multi-purpose Monte Carlo (MC) code for simulation of light propagation in complex structures modelled with e.g. magnetic resonance images. The code is designed to execute parallel threads on a Linux-based cluster of computers equipped with multiple graphical processing units (GPU) utilizing NVidia CUDA technology. We show steps one can take to implements such code itself. Furthermore, we provide methodology of building a MRI-based head model and populating it with realistic optical properties at excitation and fluorescence emission wavelengths during inflow of fluorescence agent (indocyanine green – ICG). The proposed code provides following original features: (i) Simulation of fluorescence light propagation in media with spatial distribution of multiple different fluorophores characterized by concentration, quantum yield and fluorescence lifetime. (ii) The fluorescence light tracking does not need extra photon tracking and works in parallel with tracking photons at the excitation wavelength, introducing execution time overhead of 0.02% only. (iii) Calculation of high-resolution spatial distributions of sensitivity factors mapping voxels absorption change to parameters measured on a model surface: statistical parameters (moments) of the distribution of time of flight of photons. (iv) Random number generators states are preserved between runs to greatly improve calculation time of the sensitivity factors. (v) Simulation of fluorescence lifetime wide field imaging in diffusively scattering media. The code is designed to handle big models, divided into e.g. 200 million voxels or more, which other methods struggle to handle. Simulations on a human head model with 0.3 mm voxel size require 2 GB of a GPU memory only. This is supported by developed non-standard floating-point data storage format. The proposed code is cross-validated with field-leading MC and finite element methods on the same hardware environment for varying model sizes and temporal resolutions. Tests revealed competitive execution time and high temporal resolution of boundary data for high spatial resolution of MRI-based head model.

19

Betony inne niż wszystkie

Jackiewicz-Rek Wioletta

Przegląd Budowlany

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2020

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R. 91, nr 2

22--31

PL

W artykule przedstawiono wybrane, najciekawsze rodzaje betonu architektonicznego, które oprócz walorów dekoracyjnych mają funkcje dodatkowe. W tekście opisano warunki wdrażania nowych technologii, takich jak fotobeton, beton fotokatalityczny, beton transparentny i beton z eksponowanym kruszywem. Te rodzaje betonu wykonuje się dzięki odpowiedniemu pod względem jakościowym i ilościowym doborowi podstawowych komponentów betonu, lecz także dzięki komponentom dodatkowym, które, w połączeniu ze specjalną technologią produkcji i osadzania, pozwalają na uzyskanie unikalnych właściwości, takich jak: odwzorowania obrazu na powierzchni – fotobeton, możliwość redukcji tlenków azotu – beton fotokatalityczny, przezroczystość – beton transparentny lub „powierzchnie podświetlone” – beton z eksponowanym kruszywem. Przedstawione w artykule rodzaje niewątpliwie różnią się od zwykłego betonu, choćby ze względu na jakość, i przyciągają uwagę dzięki unikalnej powierzchni i oddziaływaniu na środowisko.

EN

The paper presents selected, the most interesting types of architectural concrete, which have additional functions in addition to their decorative value. The conditions for implementing new technologies such as photoconcrete, photocatalytic concrete, transparent and luminescent aggregate concrete were described. These concretes are made due to the appropriate qualitative and quantitative selection of basic concrete components but also additional components, which, combined with a special production and embedding technology, allow to obtain special properties such as: image mapping on the surface – photoconcrete, the possibility of reducing nitrogen oxides – photocatalytic concrete, transparency – transparent concrete, or “luminous surfaces” – concrete with luminescent aggregate. These are certainly different than any concrete, if only because of quality and attract attention form the visible surface and the preset function in the environment.

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Synthesis, growth and studies of pristine and nickel doped L-valinium picrate crystals for organic light emitting diodes applications

Ragunathan A. S., Selvapandiyan M.

Materials Science Poland

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2020

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Vol. 38, No. 2

374--380

EN

Single crystals of L-Valinium Picrate (LVP), 0.1 mol% Ni2+ doped L-Valinium Picrate, and 0.2 mol% Ni 2+ doped L-Valinium Picrate were grown by low temperature solution growth method, especially by solvent evaporation technique at ambient temperature. Function groups and modes of vibration were identified by FT-IR studies. The grown crystals belong to monoclinic system which has been revealed by powder XRD. The estimated band gaps were found to be 3.86 eV for LVP, 3.72 eV for 0.1 mol% Ni2+ doped LVP, and 3.70 eV for 0.2 mol% Ni2+ doped LVP crystals, respectively. The PL excitation wavelength of the grown materials is 370 nm. All the elements (C, N, O, Ni, and Cl) as per molecular formula were present in the EDAX spectrum of the grown materials. The 0.2 mol% Ni2+ ion doped LVP materials had higher thermal stability (208 °C) than LVP and 0.1 mol% Ni2+ doped LVP.