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Inverted Fluorescence

Discovery of chromophores that emit light in the ultraviolet region when excited with visible light

23-Dec-2020

Fluorescence usually entails the conversion of light at shorter wavelengths to light at longer wavelengths. Scientists have now discovered a chromophore system that goes the other way around. When excited by visible light, the fluorescent dyes emit light in the ultraviolet region. According to ...

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Molecular twist makes one catalyst useful for three hydrogen applications

"In a way, we've created a molecule with a steering wheel on it"

12-Jun-2020

Scientists from Kyushu University and Kumamoto University in Japan have developed a new catalyst capable of assisting three key reactions for using hydrogen in energy and industry. Inspired by three types of enzymes in nature, this research can help elucidate unknown relationships among ...

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Extraordinarily thick organic light-emitting diodes solve nagging issues

New approach eases manufacturing constraints and improves viewing angle with little effect on performance

02-Aug-2019

By combining thin organic layers with thick layers of hybrid perovskite, researchers at Kyushu University in Japan have developed micrometer-thick organic light-emitting diodes that could improve the affordability and viewing angles of high-performance displays and televisions in the near ...

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Atomically precise models improve understanding of fuel cells

Computer simulations using models based on real-world atomic structures from microscope observations shed new light on the reaction pathways in fuel cells

23-Jul-2019

Simulations from researchers in Japan provide new insights into the reactions occurring in solid-oxide fuel cells by using realistic atomic-scale models of the active site at the electrode based on microscope observations as the starting point. This better understanding could give clues on ways ...

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Organic laser diodes move from dream to reality

03-Jun-2019

Researchers from Japan have demonstrated that a long-elusive kind of laser diode based on organic semiconductors is indeed possible, paving the way for the further expansion of lasers in applications such as biosensing, displays, healthcare, and optical communications. Long considered a holy ...

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Smart Fluorescent Dyes

Modulating photo- and electroluminescence in a stimuli-responsive molecular dye

17-Aug-2018

Controlling the excited electronic states in luminescent systems remains a challenge in the development of fluorescent and phosphorescent dyes. Now, scientists in Japan have developed a unique organic fluorophore that changes its emission color without loss of efficiency when externally ...

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Harnessing hopping hydrogens for high-efficiency OLEDs

11-Jul-2017

Renewed investigation of a molecule that was originally synthesized with the goal of creating a unique light-absorbing pigment has led to the establishment of a novel design strategy for efficient light-emitting molecules with applications in next-generation displays and lighting. Researchers at ...

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Multifunctional catalyst for poison-resistant hydrogen fuel cells

28-Jun-2017

Japanese collaboration develops catalyst that can oxidize both hydrogen and carbon monoxide to produce energy Demand for eco-friendly fuel sources is increasing as the goal of weaning off our reliance on fossil fuels becomes commonly recognized. Hydrogen represents a possible sustainable fuel ...

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Radioactive cesium concentrates in glass particles

Fukushima fallout in Tokyo not water or rain solulable

27-Jun-2016

New research shows that most of the radioactive fallout which landed on downtown Tokyo a few days after the Fukushima accident was concentrated and deposited in non-soluble glass microparticles, as a type of 'glassy soot'. This meant that most of the radioactive material was not dissolved in rain ...

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Innovative catalyst fabrication method may yield breakthrough in fuel cell development

10-Mar-2016

The successful future of fuel cells relies on improving the performance of the catalysts they use. Gold nanoparticles have been cited as an ideal solution, but creating a uniform, useful catalyst has proven elusive. However, a team of researchers at Kyushu University's International Institute for ...

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