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314 notícias encontradas para "light"
Foto: cottonbro studio / Pexels
Artificial 'leaf' powers wireless biomedical device
Plants convert light into energy efficiently through photosynthesis—an ability that scientists and engineers still struggle to match with electronic devices. Recently, researchers have looked beyond traditional semiconductor materials to create devices using a promising class of
The universe should look the same in all directions at large scales, but DESI data suggest
Earlier this year, the Dark Energy Spectroscopic Instrument (DESI) completed observations that mapped 47 million galaxies across 11 billion light-years, allowing astronomers to better evaluate the large-scale structure of the visible universe. After studying these data, astronome
Inorganic nanoscale device behaves like a single neuron, opening doors for AI and retinal
McGill University researchers have developed a light-detecting nanoscale structure that mimics how a neuron processes information. The neuron-like behavior emerges from the materials themselves, reducing the energy demand associated with similar devices that rely on circuits or s
Foto: Marek Piwnicki / Pexels
Microscale hydrogel fibers could enable imaging inside tiny tissue structures
Researchers have developed light-transmitting hydrogel fibers that are just hundreds of micrometers in diameter. With further development, these soft fibers could one day make it possible to use imaging techniques to detect early breast cancer hidden inside very small breast duct
Foto: Opt Lasers from Poland / Pexels
Metal hydride molecule trapped with laser light opens path to ultracold hydrogen
Controlling and trapping molecules, units of a substance consisting of two or more chemically bound atoms, with laser light is significantly more challenging than trapping individual atoms. This is because molecules exhibit more complex vibrational and rotational dynamics that ma
Secrets of how we see color revealed at the molecular level
A global team has cracked a decades-old mystery, revealing the atomic structures of the molecules in our eyes that allow us to see colors. "To understand how we detect light and perceive colors, we need to know the exact structure of light-sensitive molecules in our eyes," said T
New solid-state material converts sunlight into higher-energy UV light
A new sunlight-powered material can convert visible light into higher-energy UV light, overcoming a challenge that has frustrated scientists for years. The breakthrough could enable cleaner air purification, solar-driven chemistry, and advanced manufacturing technologies using no
May 2024 superstorm drew most ring current ions from Earth, not solar wind, research revea
In May 2024, auroras were observed at unusually low latitudes across the globe, lighting up skies that rarely see such displays. Inside Earth's magnetosphere, the region of space surrounding our planet and dominated by its intrinsic magnetic field, something significant was final
Far-red radiation and elevated CO₂ boost biomass accumulation in young leaf lettuce indoor
Far-red radiation and elevated CO₂ boost biomass accumulation in young leaf lettuce indoor
A new study from scientists at Purdue University reports that far-red radiation, in combination with increased carbon dioxide (CO₂) concentration, significantly enhances biomass production in young leaf lettuce grown under controlled environments, offering practical guidance for
How atomic defects can program carbon quantum dots for future light-based technologies
How atomic defects can program carbon quantum dots for future light-based technologies
Carbon quantum dots (CQDs) are tiny carbon-based nanomaterials that have attracted increasing attention as environmentally friendly alternatives to conventional heavy-metal quantum dots. They are lightweight, photostable and potentially biocompatible, and their light absorption a
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Clean crystal surface lets single molecules hit ultimate quantum limit
Scientists at the Max Planck Institute for the Science of Light (MPL) have developed a technique for interrogating molecules on surfaces with spectroscopic precision, thereby reaching the ultimate quantum limit for the first time. With their findings, published in Science, the re
Astronomers found two rare super puff planets lighter than cotton candy
Astronomers found two rare super puff planets lighter than cotton candy
Two newly confirmed "super-puff" planets are so diffuse that they are less dense than cotton candy, despite being about the size of Jupiter. Their rare orbital relationship and enormous, lightweight atmospheres could provide valuable clues about how some of the strangest planets