Current Luminescence News and Events

Current Luminescence News and Events, Luminescence News Articles.
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Pillarene hybrid material shows enhanced tunable multicolor luminescence and sensing ability
Tunable luminescent materials are highly desirable owing to their broad application potential in various fields. Recently, a pillar[5]arene-based hybrid material with stimuli-responsive luminescent properties and ion sensing abilities has been elegantly constructed from a pyridine-modified conjugated pillar[5]arene and a planar chromophore oligo(phenylenevinylene) upon coordination of Cd (II) metal cores. Enhanced and tunable luminescence was achieved via the construction of the rigid coordinated structure and the effective modulation of pillar[5]arene. (2021-01-14)

International research project investigates photosensitive carbon nanoparticles
An international team of researchers, including researchers from FAU headed by Prof. Dr. Dirk M. Guldi have now managed to identify the fundamental problems relating to the photophysics and photochemistry of carbon nanocolloids (CNC), and ascertain possible approaches for research into these readily available, non-toxic and adaptable nanomaterials. (2020-12-14)

Potential extreme condition history detector - recoverable PL achieved in pyrochlore
Photoluminescence (PL) is light emission from a substance after the absorption of photons stimulated by temperature, electricity, pressure, or chemistry doping. An international team of scientists led by Dr. Wenge Yang from Center for High Pressure Science &Technology Advanced Research (HPSTAR) presents a strong tricolor PL achieved in non-PL pyrochlore Ho2Sn2O7 through high pressure treatment. Interestingly the PL can be much enhanced after pressure release and recovered to ambient conditions. Their study is published in the recent issue of Physical Review Letters. (2020-12-11)

Silver linings: Adding silver to the nanoclusters can do wonders for their luminescence
Scientists at Tokyo Institute of Technology have discovered that a silver-doped platinum thiolate nanometal complex shows 18-fold greater photoluminescence than the original platinum complex. In their recent paper, they provide insights into the causes of this, crowning a new approach to creating efficient non-toxic and biocompatible compounds for bioimaging. (2020-12-08)

Appearances can be deceiving: Display versus surface colors
The white of paper and the white of monitor can be precisely the same color values, yet they appear fundamentally different. That disparity may not lie in the mode of display, but rather how the colors are constructed, according to a research team at Yokohama National University in Japan. They published their findings on October 27 in Scientific Reports, a Nature Research journal. (2020-12-07)

Solar cells of the future
Organic solar cells are cheaper to produce and more flexible than their counterparts made of crystalline silicon, but do not offer the same level of efficiency or stability. During his doctoral thesis, Andrej Classen, who is a young researcher at FAU, demonstrated that increases in efficiency can be achieved using luminescent acceptor molecules. (2020-11-03)

RUDN University chemists developed new magnetic and luminescent lanthanide-siloxane-based compounds
A team of chemists from RUDN University synthesized new organosilicon compounds containing terbium and europium ions. These complexes have an unusual cage-like crystal structure that contains four metal ions. The team was the first to study the magnetic and photophysical properties of such compounds and to observe their magnetic phase transition and luminescence properties. (2020-11-03)

Cerenkov luminescence imaging identifies surgical margin status in radical prostatectomy
A new intraoperative imaging technique, Cerenkov luminescence imaging (CLI), can accurately assess surgical margins during radical prostatectomy, according to a first-in-human research published in the October issue of The Journal of Nuclear Medicine. The feasibility study showed that 68Ga-PSMA CLI can image the entire excised prostate specimen's surface to detect prostate cancer tissue at the resection margin. (2020-10-07)

Light from rare earth: new opportunities for organic light-emitting diodes
Efficient and stable blue OLED is still a challenge due to the lack of emitter simultaneously with high efficiency and short excited-state lifetime. A blue emission cerium(III) complex was demonstrated for a high efficiency OLEDs with superior stability. The excellent performance could be assigned to the nanoseconds spin- and parity- allowed 5d?4f transition of Ce3+ ion. Along with adjustable emission color and low cost, cerium(III) complexes would be promising emitters in OLEDs. (2020-10-03)

Earthquake lightning: Mysterious luminescence phenomena
Photoemission induced by rock fracturing can occur as a result of landslides associated with earthquakes. Factors involved in such earthquake lightnings were studied with granite, rhyolite, pyroclastic rock and limestone. (2020-09-28)

Impurities enhance polymer LED efficiencies
New research published in EPJ B reveals that the higher-than-expected efficiency of PLEDs can be reached through interactions between triplet excitons, and impurities embedded in their polymer layers. (2020-09-24)

Perovskite light-emitting/detecting bifunctional fibers for wearable LiFi communication
LiFi is paradigm-shifting the common means of high-capacity wireless communication technologies and needs wearable and full-duplex compact design on account of its great significance in smart wearables as well as the 'Internet of Things'. Towards this goal, Scientist in China invented a light-emitting/detecting bifunctional fibre enabled by perovskite QDs with hybrid components, which enables the simultaneous electroluminescence and photodetection in monofilament. This work paves a way for the fabrication and integration of interoperable smart wearables. (2020-09-23)

A new way of modulating color emissions from transparent films
Transparent luminescent materials have several applications; but so far, few multicolor light-emitting solid transparent materials exist in which the color of emission is tunable. Now, a team of scientists from Japan has developed an unprecedented mechanism to tune the photoemission of a solid polymeric film--controlling the flow of protons in it by applying a voltage. Their study provides fresh insights into the creation of more efficient multicolor transparent luminescent materials. (2020-09-02)

Optical imaging enters sub-nanometer era
Researchers improved the spatial resolution from 8 nm to ~8 Å of photoluminescence imaging. It realized sub-molecular resolution with single molecule photofluorescence imaging for the first time. (2020-08-27)

Pressure-induced 2D-3D conversion in hybrid lead iodide layered perovskite
Here, we demonstrate that 2D D-J perovskites experience various transitions under pressure, such as crystalline-amorphous and 2D-three-dimensional structural transformation, and the probable metallization are strongly suggested. Moreover, the fundamental changes in the material properties are observed at ambient conditions after pressure treatment, which is crucial for achieving the desired characteristics for viable applications. (2020-08-12)

Rapid test for the determination of antibodies against Sars-Cov-2
To determine immunity to Sars-Cov-2 and the effectiveness of potential vaccines, the amount of neutralising antibodies in the blood of recovered or vaccinated individuals must be determined. A traditional neutralisation test usually takes two to three days and must be carried out with infectious coronaviruses in a laboratory complying to biosafety level 3. A Swiss-German research team has launched a test that takes only 18 hours and doesn't have high biosafety requirements. (2020-07-30)

Geoscientists glean data suggesting global climate changes increase river erosion rates
Using cosmogenic nuclide burial dating methods and optically stimulated luminescence dating, geoscientists establish ages for river deposits from the Yukon River basin that span key time periods of global climate change. (2020-07-20)

New research shows that laser spectral linewidth is classical-physics phenomenon
New ground-breaking research from the University of Surrey could change the way scientists understand and describe lasers - establishing a new relationship between classical and quantum physics. (2020-07-10)

Black phosphorus-based van der Waals heterostructures for mid-infrared light-emission applications
Optically- and electrically- driven mid-infrared (MIR) light-emitting devices are realized in a simple but novel van der Waals (vdW) heterostructure, constructed from thin-film black phosphorus (BP) and transition-metal dichalcogenides (TMDC). This work suggests that vdW heterostructure is a promising platform for mid-infrared research and applications. (2020-07-10)

Pitt researchers' new material allows for unprecedented imaging deeper in tissues
A team from the Department of Chemistry has established an approach for the creation of a metal-organic framework material that provides new perspectives for biological imaging. (2020-06-09)

Russian scientists demonstrate ion implantation advantages for the use of silicon in optoelectronics
Silicon is the main material in electronic engineering. All information and computing technologies that play a key role in modern civilization are based on silicon: computers, communications, astronautics, biomedicine, robotics and much more. (2020-06-05)

Aluminum oxide crystal tested as a UV radiation sensor
Doped with carbon and magnesium, the material becomes thermoluminescent in response to UV radiation. (2020-06-02)

Dendrimers finally have what it takes to break into the laser scene
A team including researchers from the University of Tsukuba has produced a family of dendrimers that form single-crystals and can harvest non-polarized light and transform it into polarized emission. The dendrimer crystals are both optically and mechanically stable to optical pumping, making them the first example of a crystalline material combining dendrimer properties and laser performance. The crystals are expected to have numerous applications in the field of laser optics, for example in displays. (2020-05-07)

Scientists develop stable luminescent composite material based on perovskite nanocrystals
An international team of scientists that includes researchers from ITMO University has developed a new composite material based on perovskite nanocrystals for the purpose of creating miniature light sources with improved output capacity. The results have been published in ChemNanoMat. (2020-04-27)

The cause of the red coloration in stalagmites
A study by the UPV/EHU confirms the cause of the mysterious red colour of the stalagmites in the Goikoetxe Cave located in the Urdaibai Biosphere Reserve, and its potential use as an indicator of palaeoclimate changes on the Cantabrian seaboard between 7,000 and 5,000 years ago. (2020-04-27)

Shedding light on dark traps
A multi-institutional collaboration, co-led by scientists at the University of Cambridge and Okinawa Institute of Science and Technology Graduate University (OIST), has identified the source of efficiency-limiting defects in potential materials for next generation solar cells and LEDs. (2020-04-15)

KIST develops foldable and washable luminescent film
Infrared radiation, which is invisible yet highly utilizable, is used in various fields and for various purposes, such as for coronavirus detection (i.e. through thermal imaging cameras and biosensors). A Korean research team has developed a technology that visualizes infrared radiation and expands its application range. (2020-04-08)

Textile-fiber-embedded multiluminescent device for future wearable devices
Dr. Soon Moon Jeong's research team in the Division of Energy Technology at DGIST has developed a new structure of luminescence technology. This will enable the production of light-emitting elements that overcome the limitations of existing methods, expecting to greatly help improve the efficiency of light-emitting elements used in various ways such as billboards and banners. (2020-03-31)

New carbon dot-based method for increasing the efficiency of solar cells & LED
An international group of scientists has proposed a method that allows for significantly increasing the efficiency of solar cells and light-emitting diodes by augmenting the auxiliary layers of the devices responsible for electron transport. (2020-03-25)

Water-induced MAPbBr3@PbBr(OH) with enhanced luminescence and stability
Lead halide perovskites are materials that emit light with a range of colors, but also suffer from poor moisture stability. Scientist in China demonstrated a new synthetic technique that can enable perovskites to emit bright fluorescent light by addition a dose of water, even when submerged under water for more than a year. Successful fabrication of the hydrated crystals as phosphors within light-emitting devices indicates their potential for industrial purposes. (2020-03-23)

Sensing internal organ temperature with shining lights
A cheap, biocompatible white powder that luminesces when heated could be used for non-invasively monitoring the temperature of specific organs within the body. Tohoku University scientists conducted preliminary tests to demonstrate the applicability of this concept and published their findings in the journal Scientific Reports. (2020-03-23)

New state-of-the-MOF materials
Metal-organic frameworks (MOFs) are porous, crystalline materials that can trap compounds within their molecular cavities, giving them a wide range of applications in gas storage and separation, carbon capture, and in the catalysis of chemical reactions, to name a few. A new range of applications are now being investigated by converting crystalline MOFs into liquid and/or glassy states. (2020-02-28)

New 3D chirality discovered and synthetically assembled
Multi-layer 3D chirality of C2-symmetry has been revealed and enantioselectively synthesized. This chirality is a new addition to the family of known chirality consisting of element central, axial/helical, spiro and double planar types. In this 3D chiral framework, the top and bottom layers restrict each other from free bond rotation. These chiral 3D molecules showed strong luminescence of various colors under UV irradiation in both solution and solid phases, and displayed strong aggregation-induced emission (AIE). (2020-02-19)

Ultrafast stimulated emission microscopy of single nanocrystals in Science
ICFO researchers report on a new ultrafast stimulated emission microscopy technique that allows imaging of nano-objects and investigating their dynamics. (2019-12-09)

Black silicon can help detect explosives
Scientists from Far Eastern Federal University (FEFU), Far Eastern Branch of the Russian Academy of Sciences, Swinburne University of Technology, and Melbourne Center for Nanofabrication developed an ultrasensitive detector based on black silicon. The device is able to detect trace amounts of nitroaromatic compounds and can be applied to identify the majority of explosives or highly toxic pollutants for medical and forensic evaluations. The related article was published in ACS Sensors. (2019-11-27)

Wolfe Creek Crater younger than previously thought
Wolfe Creek Crater, one of the world's largest meteorite craters, is much younger than previously thought. (2019-11-21)

What leads to compulsive alcohol use? New experiments into binge drinking provide answers
New study from neuroscientists at Vanderbilt provides initial answers to long-standing scientific questions on what causes the transition from moderate to compulsive alcohol consumption - and what makes some drinkers particularly vulnerable to developing alcohol use disorders. (2019-11-21)

Evidence of two quakes extends rupture history in Grand Tetons National Park
Hand-dug trenches around Leigh Lake in Grand Teton National Park in Wyoming reveal evidence for a previously unknown surface-faulting earthquake in along the Teton Fault -- one occurring about 10,000 years ago. (2019-11-19)

A novel method for analyzing marine sediments contributes to paleoclimate reconstitution
Researchers supported by FAPESP proposed a procedure based on analyses of quartz and feldspar grains transported to the Atlantic Ocean by the Parnaíba River in Brazil's Northeast region. (2019-11-06)

Scientists discover method to create and trap trions at room temperature
A University of Maryland-led team chemically engineered carbon nanotubes to synthesize and trap trions at room temperature. Trions are quasi particles that can potentially carry more information than electrons in applications from bioimaging to chemical sensing and quantum computing. The research makes it possible to manipulate trions and study their fundamental properties in ways that have never been possible before. (2019-10-16)

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