Luminescence - Science topic

The article presents a comprehensive study of the synthesis, phase formation, electronic structure, and optical properties of cobalt-doped aluminum oxynitride Al5O6N (AlON) in the concentration range of 0.01–5 at%. The solubility limit of cobalt in AlON is found to be 0.1–0.2 at% compared to Al. No corundum is detected even at the lowest cobalt con...

The paper presents the results of study on the luminescent system of the culture of the fungus Mycena gombakensis derived out of wood samples. The changes on samples stored for duration of 10 years in non-sterile conditions and the dynamics of luminescent signals are described. A phylogenetic approach was used to recognize fungal species. A number...

Certain volatile organic compounds (VOCs), such as formaldehyde, acetone, and ethanol, are overexpressed in some terminal diseases like cancer, diabetes, Alzheimer's, etc. Therefore, high‐precision detection and quantification of VOCs is imperative for early diagnosis of such detrimental diseases. Non‐invasive and accurate fluorescence‐based detect...

Ligands combining two lateral bis‐pyridyl‐phosphonated‐pyclens were synthesized, using a flexible linear pegylated linker (L2) or a bulkier K22 crown‐ether (L3). A functionalized pyridyl‐phosphonated‐pyclen (L1) was also prepared as a mononuclear analogue. Coordination behavior of lanthanide cations was studied via NMR titration with Lu for L1, and...

The bottom‐up synthesis of discrete tubular molecules that mimic the structural features of carbon nanotubes has been a long‐standing pursuit for synthetic chemists. As the shortest segments of armchair‐type carbon nanotubes, cycloparaphenylenes are regarded as ideal macrocyclic building blocks for achieving this goal. Here we report the synthesis...

Luminescent polymers have gained considerable research effects in different fields, which are generally prepared by incorporating traditional luminescent moieties. In recent years, non‐traditional intrinsic luminescent (NTIL) polymers containing no traditional luminescent moieties have been reported, which have attracted broad attention. This revie...

Low‐dimensional hybrid metal halides (LDHMHs) have emerged as a highly promising class of functional materials for a wide range of optoelectronic applications. Their exceptional structural tunability, facilitated by the hybridization of metal halides with organic compounds, enables the formation of three‐, two‐, one‐, or zero‐dimensional structures...

Mn(II)‐based halides have recently garnered significant interest as emerging luminescence materials for diverse photonic applications. Generally, Mn(II) hybrids with tetrahedral coordination show green emission, however, ones with octahedral coordination give red emission. Herein, we design the synthesis of tetrahedral Mn(II) pseudohalide hybrids,...

Multinuclear complexes have attracted great attention because of their superior properties originating from the cooperative effects between the metal ions. In this study, we synthesized polynuclear zinc complexes by chelation between the side‐chains of polyhedral oligomeric silsesquioxane (POSS). From the NMR spectroscopy, high‐resolution mass spec...

Despite the potential in cancer therapy, phototheranostic agents often face two challenges: limited diagnostic sensitivity due to tissue autofluorescence and suboptimal therapeutic efficacy due to the Type‐II photodynamic process with the heavy oxygen reliance. In contrast, chemiluminescent theranostic agents without the requirement of real‐time li...

This work describes the effects of using neutron irradiation on cellulose and non-destructive methods to analyze linen fabrics of high heritage value. For this purpose, 8 samples were irradiated with increasing doses of neutrons and gamma rays up to 166 kGy of total dose. The samples were characterized by techniques such as ultraviolet luminescence...

Phosphonate compounds have been proposed as atypical chromophores, but their luminescence properties, especially in combination with flexible aliphatic chains, remain underexplored. In this study, we have synthesized a series of novel siloxane‐containing phosphonate esters as organofluorophores through a catalyst‐free, one‐pot Kabachnik–Fields (K–F...

The (Gd1-xLux)3Al5O12 garnet compounds doped with 5% Eu 3+ were synthesized using the solid-state reaction method calcined at 1450°C. Despite the stabilization of the phase Gd3Al5O12 by lutetium and doped europium, XRD structural analysis revealed the presence of secondary phases, including sesquioxide (R: Ln2O3), monoclinic garnet (M: Ln4Al2O9), a...

The kinetics of the reactions of nitrogen dioxide, NO$_2$, with atomic oxygen and atomic carbon in their ground triplet states ($^3$P) have been studied at room temperature and below using a supersonic flow (Laval nozzle) reactor. O($^3$P) and C($^3$P) atoms (hereafter O and C respectively) were created in-situ by the pulsed laser photolysis of the...

Rapid and safe neutralization assays are required for highly pathogenic avian influenza viruses, including a clade 2.3.4.4b H5N1 subtype recently found in cows. Here, we report a neutralization assay using luminescent virus‐like particles. This assay has lower biosafety requirements and provides a larger dynamic range than conventional methods. We...

The limited processability of metal‐organic frameworks (MOFs) is hindered flexibility in the manipulation of their aggregation state and applications. Therefore, achieving highly processable MOFs is of great significance but a challenging goal. Herein, a facile strategy is presented for achieving the construction of solution‐processable Mg‐based MO...

InxGa1-xN films with tunable bandgap hold significant potential for photoelectric applications, particularly in wavelength-selective and UV–visible photodetection. Herein, a unique target was designed to prepare bandgap-tunable InxGa1-xN films by RF (radio frequency) magnetron sputtering. By adjusting the RF power to change the In content (x value)...

Localized symmetry has been shown to significantly impact the luminescence behavior of Mn⁴⁺ ions through the electron–phonon coupling process. Building on this characteristic, three types of inverse spinel structure oxides (Mg2XO4, where X = Ti, Ti/Ge, Ge) doped with Mn⁴⁺ were developed, exhibiting strong red emission when exposed to UV and blue li...

Multidimensional influences of indium composition in barrier layers on GaN-based blue laser diodes (LDs) are discussed from both material quality and device physics perspectives. LDs with higher indium content in the barriers demonstrate a notably lower threshold current and shorter lasing wavelength compared to those with lower indium content. Our...

Robust and biocompatible hydrogels are recognized as promising biomimetic soft materials to improve human life quality. To ensure their stable, reliable, and safe service, the hydrogels are further required to have non‐contact and wireless stress sensing ability. Herein, a mechanoluminescence (ML) based micellar hydrogel is developed, in which the...

Wind activity is a powerful force that shapes the landscapes of deserts, coastal areas, and regions adjacent to ice sheets, and it has significant implications for human settlement. In southern Greenland, it has been proposed that the increased wind and soil erosion observed around Norse settlements (~985–1450 CE) were caused by overgrazing by anim...

Bismuth‐doped fibers (BDFs) are renowned in wideband amplification due to their numerous gain bands, such as O, E, S, and U. However, the low amplification coefficient and excessive usage length hinder its further application, how to achieve a high amplification coefficient remains an unresolved challenge. In this study, a high‐efficiency bismuth‐d...

White light-emitting diodes (WLEDs), as strong contenders for future solid-state light sources, hold significant promise in solid-state lighting due to their high efficiency, low power consumption, self-emission, and versatility. Carbon dots (CDs), a novel type of carbon nanomaterials, exhibit excellent luminescence properties. However, their intri...

Purpose In vivo dosimetry is a common requirement to validate dose accuracy/uniformity in total body irradiation (TBI). Several detectors can be used for in vivo dosimetry, including thermoluminescent dosimeters (TLDs), diodes, ion chambers, optically stimulated luminescent dosimeters (OSLDs), and film. TLDs are well established for use in vivo but...

Chiral luminescent liquid crystal (LC) materials with switchable circularly polarized luminescence (CPL) signals have received extensive attention, in which the use of light stimulation to achieve different CPL states is of great significance. However, there are very few reports on the generation and regulation of CPL signals enabled by blue phase...

In the framework of luminescent rare-earth-doped glasses for near-infrared applications, TiO2-containing inorganic glasses have been recently demonstrated to be a promising alternative to commercially used high-phonon SiO2-based glasses. This study investigates the effect of TiO2 concentration on the near-infrared spectroscopic properties of Yb3+ i...

Indium phosphide is the leading material for commercial applications of colloidal quantum dots. To date, however, the community has failed to achieve successful operation under strong excitation conditions, contrasting sharply with other materials. Here, we report how the unusual photophysics of state-of-the-art InP-based quantum dots make them una...

Optical temperature measurement overcomes certain limitations associated with traditional contact methods. Fluorescence Intensity Ratio (FIR) technology is often used in optical temperature measurement. Furthermore, selecting appropriate host materials can increase temperature-sensing sensitivity. The conventional melt quenching method forms transp...

Starting from AIEgen‐functionalized chiral [2]rotaxane building block, we have successfully synthesized a new class of chiral rotaxane‐branched dendrimers through controllable divergent strategy for the first time, based on which novel chiral artificial light‐harvesting systems (LHSs) were successfully constructed in aqueous phase by sequentially i...

Cesium lead halide perovskite quantum dots (QDs) exhibit promising potential due to their excellent optoelectronic properties, but the poor stability and limited processability of it are main obstacles for their practical applications. Here, a facile strategy is reported for the synthesis of ultra‐stable perovskite quantum dot polymer films to over...

Low‐dimensional lead‐free metal halide perovskites have attracted considerable attention for the development of multifunctional optoelectronic materials owing to their extensive structural diversity and adjustable optical properties. However, organic cation‐based low‐dimensional metal halides often exhibit limited thermal stability, while inorganic...

Pulsed light (PL) treatment is considered an emerging method for processing liquid foods. Efficient liquid food treatment design requires determining fluence to estimate microorganisms’ inactivation kinetics and develop effective treatment protocols. Despite available tools to determine PL equipment fluence, these are often costly and overlook the...

Understanding the luminescence mechanics of metal halide perovskites is the key to uncovering the detailed pathways responsible for remarkable photophysical properties and engineering materials with enhanced optoelectronic properties. In this work, high pressure is employed to reveal the self‐trapped exciton (STE) emission features of a 1D lead bro...

We present a series of six hypervalent bismuth complexes Bi(R1PDPR2)X bearing ligands characterized by the pyridine‐2,6‐bis(pyrrolide) (PDP) structural motif. While bismuth holds considerable potential for facilitating efficient intersystem crossing (ISC), reports on phosphorescent molecular bismuth complexes are still scarce and mostly based on sy...

The luminescent solar concentrator (LSC) can function as an electricity‐generating window whose performance is hindered by an inherent trade‐off between power conversion efficiency and visible light transmission. To optimize this trade‐off, a numerical algorithm is used to find the power conversion efficiency of 92 luminophores, ensuring an average...

Avoiding the second leakage and boosting the complexity of confidential information have been two key directions in the development of the field of information security. However, it still remains formidable challenges to combine these two strategies in a single luminescent material. Here, it has integrated multiple‐node time‐gated information encry...

Carbon dots (CDs) are carbon‐based nanomaterials that have garnered immense attention owing to their exceptional photophysical and optoelectronic properties. They have been employed extensively for biomedical imaging and phototherapy due to their superb water dispersibility, low toxicity, outstanding biocompatibility, and exceptional tissue permeab...

This paper reports the influence of gold nanoparticle (Au NPs) concentration variation on the physical properties of some Sm³⁺/Dy³⁺ co-doped zinc-sodium tellurite glasses. These glasses with composition of (58.8–z) TeO2–25ZnO–15Na2O–0.8Sm2O3–0.4Dy2O3–zAu (where z = 0.02, 0.04, 0.06, 0.08, and 0.10 mol%) were prepared via the melt-quenching approach...

Matrix immobilization has been proven to be a favored method for enhancing the phosphorescence of carbon dots (CDs), however, it remains a significant challenge to realize time‐dependent phosphorescence colors (TDPC) by embedding CDs with single emission center. In this study, we present a novel matrix‐controlling strategy to regulate the microenvi...

We present empirical models for measured frequency-dependent insertion loss (|S21|) in a prototypical through silicon via (TSV) enabled 3D-IC from Sematech for characterization of defects formation due to thermal treatment. We measure |S21| on TSV-interconnects, as a function of the extent of thermal annealing. The model parameters are determined w...

The synthesis of a novel bidentate ligand-protected copper nanocluster via a solid-state strategy is reported. Single-crystal X-ray diffraction analysis result reveals that the copper nanocluster features an octahedral core (Cu6) coordinated by six ligands. Noncovalent interactions (C-H…π and π…π) exist between the copper nanoclusters. The copper n...

The direct detection of singlet-state oxygen (1O2) constitutes the holy grail dosimetric method for type-II photodynamic therapy (PDT), a goal that can be quantified using multispectral singlet oxygen near-infrared luminescence dosimetry (MSOLD). The optical properties of tissues, specifically their scattering and absorption coefficients, play a cr...

In this study, pellets fabricated from powdered rose quartz are investigated for their potential as ionizing radiation detectors, taking advantage of the abundant availability of quartz in the Earth's crust. For this purpose, optically stimulated luminescence (OSL) technique, using blue and green light stimulation, was used. The pellets were irradi...

Single‐phase white‐light emitters in the lighting technology overcome the challenges of re‐absorption and color shift. However, achieving the broadband white emission in single‐phase phosphor remains a challenge. Here, crystallized KBaScSi3O9:Eu²⁺ (KBSSO:Eu²⁺) glass‐ceramics (GC) with abundant cationic sites have been developed and an ultra‐broad e...

Nanozymes represent a new generation of artificial enzymes that combine nanomaterial properties with catalytic activities similar to those of natural enzymes. It has significant advantages in catalytic efficiency, selectivity, and stability, leading to increasing interest in their application in aqueous environments. Since the discovery of enzyme-l...

The present work reports high energy ion beam irradiation induced modifications in Ge/Al2O3 multilayers (MLs). Ge and Al2O3 ML thin films were deposited using the electron beam evaporation technique. Afterward, the as-deposited films were annealed using rapid thermal annealing (RTA) at different temperatures ranging from 500 °C to 800 °C under high...

Cahuachi (Nazca River Valley, South Peru) was the major ceremonial center of the Nasca civilization. According to previous studies, it was struck and destroyed by three El Niño-Southern Oscillation events, which would have occurred around 100 BCE, 600 CE and 1000 CE, respectively. At the end of the series of events, the ceremonial center would have...

Temperature-responsive elastin-like polypeptides (ELPs) exhibit a low critical solution temperature-type phase transition and offer potential as useful materials for the construction of nanoparticles. Herein, we developed a novel decoration method for ELP-based nanoparticles via isopeptide bond formation with the SnoopTag/SnoopCatcher system that i...

The increasing boron effect significantly enhanced the luminescence and asymmetry of double perovskite phosphor. The structural, morphological and spectral characteristics of Sr2Gd1−xTaO6:xEu³⁺, (x = 0.5–20 mol%) and Sr2Gd1−xTaO6:xEu³⁺, yB³⁺ (x = 10 mol%, y = 0–100 mol%) phosphor series were examined in terms of Eu³⁺ increase and B³⁺ increase. In X...

Two new Tb(III) metal–organic frameworks based on 4,7-dimethylphenanthroline (dmphen) and flexible ligand trans-1,4-cyclohexanedicarboxylate (chdc2−) were synthesized and characterized. Their crystallographic formulae are [Tb2(dmphen)2(H2O)2(chdc)3]·2DMF (1; DMF = N,N-dimethylformamide) and [Tb2(dmphen)2(NO3)2(chdc)2]·2DMF (2). Among some differenc...

300 keV Fe¹⁰⁺ ions with fluences of 1×10¹⁵, 3 × 10¹⁶, and 1 × 10¹⁷ ions cm⁻² were used to implant WO3 films, developed by thermal evaporation method. After implantation, all samples were characterized for structural, morphological and optical study for gas sensing application. Furthermore, a thorough investigation and discussion of the gas sensing...

In this work, the (MnCl 2 (C 6 N 10 H 6) complex has been synthesized via solid-state reaction between manganese (II) chloride and melamine in the molar ratio of 1:2. A similar synthesis has been repeated with CoCl 2 , and FeCl 2 , resulting in two new metal-melam complexes (FeCl 2 (C 6 N 11 H 9) and CoCl 2 (C 6 N 11 H 9)). MnCl 2 (C 6 N 10 H 6) cr...

Our novel research presented the development of CdS thin films for photodetectors with significantly enhanced photosensing performances. This was achieved using Bi and Sm dopants. For the first time, we successfully developed pure CdS, Bismuth-doped CdS (CdS:Bi), samarium-doped CdS (CdS:Sm), and Bi and Sm co-doped CdS (CdS:Bi:Sm) films using facile...

The development of high mobility emissive organic semiconductors is significant for advancing optoelectronic devices with simplified architecture and enhanced performance. The herringbone‐packed structure is regarded as the ideal arrangement for simultaneously achieving high mobility and strong emission in organic semiconductors. However, it remain...

The design and synthesis of novel lanthanide-based coordination polymers (Ln-CPs) from flexible organic ligands is still attractive and challenging. In this work, two isostructural Ln-CPs with a unique 2D network, namely, [Ln2(H3L)2(DMF)]]n (Ln = Dy for 1, Tb for 2) based on a flexible polycarboxylic acid ligand hexakis(4-carboxylato-phenoxy)cyclot...