Articles tagged with Luminescence
A team of researchers at Tokyo University of Science has developed a stable and highly active photocatalyst from gold nanoclusters. By removing the protective molecules around the nanoclusters, they were able to increase their catalytic activity and stability, opening up new possibilities for hydrogen generation and other applications.
Researchers used OSL dating to directly date stone artefacts from an archaeological site in southern Tibet, revealing an age between 5,200 and 5,500 years. The analysis provides new insights into human occupation of the region and sheds light on the earliest human activities in the Tibetan Plateau.
Scientists have developed a method to quantify internal OH- impurities in upconversion nanocrystals, revealing an exponential relation between luminescence intensity and OH- content. This discovery enriches our understanding of the quenching mechanism and paves the way for highly efficient lanthanide-doped materials.
Researchers develop light-emitting metallacages via coordination-driven self-assembly, overcoming aggregation-caused quenching challenges. The AIE phenomenon enables high luminescence efficiency in aggregate states, enabling applications in sensing, biomedicine, and catalysis.
Researchers investigated luminescence caused by landslides and found different rocks emit light due to unique reasons, with granite exhibiting remarkable photoemission. The study uses ultra-sensitive cameras and spectroscopes to analyze the phenomenon, which could lead to advancements in earthquake prediction and disaster prevention.
Researchers successfully converted a 2D hybrid Dion-Jacobson lead iodide perovskite to a 3D perovskite phase at ambient conditions after pressure treatment. This process enables the use of high-pressure techniques for preparing materials with improved properties, suitable for real-world applications in optoelectronics and luminescence.
A collaborative study of North America's Yukon River basin reveals profound increases in river erosion during abrupt global intensification of climate fluctuations about 2.6 and one million years ago.
Scientists at Tohoku University have created a white powder that luminesces when heated, allowing for the potential monitoring of internal body temperature. The powder, made of zirconia, can be injected into the body and then illuminated with a near-infrared laser to induce luminescence.
Researchers developed a novel method using quartz and feldspar grains from the Parnaíba River in Brazil's Northeast region. The analysis reveals significant differences in luminescence between samples from headwaters and lower reaches of the river, reflecting changes in precipitation patterns over the past 30,000 years.
Professor Patrizio Antici's In-Air PIL technique analyzes chemical composition and crystal characteristics of artworks, reducing complexity and costs. The method has potential applications in cultural heritage conservation and material science.
Researchers from UNIGE have developed a new type of chemical sensor capable of detecting the presence of metals in the environment. The sensor forms a 3D structure with molecules that emit light when metal ions are present, making it easy to detect and identify different types of metals.
Researchers have created a water-soluble molecule that can measure pressure in solution, offering new possibilities for materials sciences, catalysis, and other fields. The molecular ruby-based system shows promising results with high sensitivity, outperforming traditional gemstone ruby measurements.
Researchers develop a method to prepare aggregated, highly luminescent nanostructures from copper-iodine cluster molecules. These nanoaggregates can be used as luminescent inks for invisible paintings and color coatings for LEDs, emitting light in various colors.
A team of researchers used a combination of Electron Spin Resonance, Luminescence and palaeomagnetic methods to reconstruct the Quaternary evolution of the lower Moulouya River in northeast Morocco.
A research team from MSU found that stretching diamond crystallites under an electric field causes changes in luminescence spectrum, making them suitable for use in quantum optic devices. The discovery could lead to the development of detectors for contact-free measuring of electric and magnetic fields with high spatial resolution
Scientists from Lomonosov Moscow State University have developed a technology to produce small diamond crystals in needle- and thread-like shapes, which could be used in sensors, quantum optical devices, and other areas of science and technology. The technique involves heating polycrystalline diamond films to oxidize most of the materi...
A new study by Dr. Georgina King and her team has disproved the idea that surface processes control tectonic deformation in the eastern Himalayas. The research reveals that changing tectonics, rather than climate, drives erosion rates in this region.
Researchers have successfully applied tunable luminescent nanocrystals to high-speed scanning technology, detecting multiple viruses within minutes. The technology enables screens that identify thousands of different target molecules simultaneously, saving time for future patients and potentially life-saving treatment.
Researchers at NC State University have developed a new processing technique that increases luminescence in LEDs by coating gallium nitride (GaN) with phosphorus-derived acid. This enhances the material's stability, making it more suitable for biomedical applications such as implantable sensors.
Berkeley Lab researchers observed direct size-dependence in metal nanocrystal phase transformations during reactions with hydrogen gas. This discovery holds key findings for optimizing commercial applications, including hydrogen storage systems, catalysts, fuel cells, and batteries.
Researchers developed a new microscope that uses X-ray excited luminescence microscopy to image material properties. The technique combines optical microscopy's spatial resolution with synchrotron radiation's element and magnetic specificity, enabling the imaging of features as small as one micron.
Researchers have developed a new endoscope technology that uses Cerenkov Luminescence to guide surgeons in removing more of cancerous tumors than possible. The technology has shown promise in laboratory experiments and may be suitable for human use, potentially improving cancer treatment outcomes.
Researchers found that impurities in quantum dots and nanorods lead to poor light emission, but heating them removes impurities, boosting luminescence. This technique enables the synthesis of high-quality nanocrystals for applications like bio-imaging and solar energy.
Scientists at Delft University of Technology have developed a new method using luminescence dating to determine the year of historic storm floods. By analyzing layers of sediment in the dunes near Heemskerk, they were able to establish that the flood occurred in either 1775 or 1776.
A Texas A&M University-led research team has discovered evidence of human occupation in Texas and North America dating back to 15,500 years ago. This finding challenges the traditional Clovis-first theory and suggests that early Americans arrived earlier than previously believed.
Researchers have found evidence suggesting humans settled in North America around 15,500 years ago, earlier than previously estimated. The discovery was made using optical dating technique at the Buttermilk Creek complex in central Texas.
Researchers at San Francisco State University have discovered 7 new glow-in-the-dark mushroom species, including four new species and three new reports of luminescence in existing species. The discoveries, which include species from Belize to Japan, suggest that luminescence evolved at a single point and was later lost by some species.
Researchers at the University of Connecticut have discovered a way to increase the luminescence efficiency of single-walled carbon nanotubes, which could lead to breakthroughs in medical imaging and biological sensors. By wrapping a chemical 'sleeve' around the nanotube, they were able to reduce exterior defects and enhance its ability...
A new study found physical evidence of ancient drug paraphernalia in the Caribbean, dated between 400 and 100 B.C., suggesting that the artifacts were transported to the islands as heirlooms. The research team used luminescence dating to analyze ceramic inhaling bowls, which indicated that they were not made using local materials.
Ripe bananas exhibit bright blue luminescence when exposed to UV light, attributed to breakdown products of chlorophyll. The intensity of the glow decreases as ripening progresses.
Oklahoma State University has received $1.5M in NSF grants to acquire two new instruments: a field emission environmental scanning electron microscope and an LTQ mass spectrometer. These instruments will enhance research capabilities in areas of interest to industry, government, and other universities.
William Yen, a UGA physics professor, has received an international honor for his groundbreaking work on luminescence. He was awarded the ICL Prize for his pioneering advances in understanding optical spectroscopic behavior of solids that emit light or luminescence.