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Chemistry
Team solves a nearly 200-year-old challenge in polymers, allowing independent control of stiffness and stretchability
Collapsible Bottlebrush An artistic representation of a network formed by cross-linking polymers, featuring a folded backbone to which many flexible linear side chains are grafted. Credit: Liheng Cai, Baiqiang Huang/Soft Biomatter Laboratory, College of Engineering and Applied Sciences, University of Virginia Researchers at the University of Virginia’s College of Engineering and Applied Sciences have developed a new polymer design that…
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Physics
A new paradigm for quantum emitter control – modulating and encoding quantum photonic information on a single optical stream
Comparison of surface morphology and influence of inverted physical deposition technology on P(VDF-TrFE) films. Credit: ACS Nano (2024). DOI: 10.1021/acsnano.4c10528 A multidisciplinary team at the U.S. Naval Research Laboratory (NRL) has developed a new paradigm for controlling quantum emitters, providing a new way to modulate and encode quantum photon information in single-photon light streams. Quantum photonics is expected to provide…
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Biology
How volatile organic compounds strengthen plant defenses and provide sustainable pest control solutions
Plants that are attacked or infested by pests emit VOCs that send signals to nearby healthy plants. This strengthens and improves the defense mechanisms of neighboring plants against pests and pathogens. Credit: Genichiro Arimura / TUS, Japan Volatile organic compounds (VOCs) are important airborne signals or odors that allow plants to communicate with other organisms and plants over short and…
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Nanotechnology
Control of sound waves through Klein tunnels improves filtering of acoustic signals
Artistic representation of Klein tunnels in phononic crystals. The snowflake pattern represents an etched aluminum nitride membrane that guides sound waves, and the probe symbolizes TMIM technology, which visualizes the movement of waves. Red and blue Dirac cones highlight the transmission of waves through energy barriers without loss. Credit: Yue Jiang In the context of sensory modalities, the eyes function…
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Physics
Physicists discover quantum superconductor behavior that provides new level of control
Changes in Josephson current and phase difference for different values ​​of reservoir temperature. Here the system size is N = 95 and the chemical potentials are summed. Credit: arXiv (2023). DOI: 10.48550/arxiv.2301.07707 New research reveals important behavior in the flow of electric current through quantum superconductors, which could advance the development of future technologies such as quantum computing. In a…
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Physics
Scientists achieve unprecedented control of active substances
Spontaneous flow of 3D active nematics confined within droplets. Credit: Physical Review X (2024). DOI: 10.1103/PhysRevX.14.041002 An international research team led by Brandeis University has made significant advances in the field of active matter physics, as detailed in a study published this week in Physical Review X. This pioneering work provides the first experimental validation of important theoretical predictions regarding…
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Science
How domestic abusers use drugs and alcohol to control their victims
Credit: Pixabay/CC0 Public Domain At least 30 years of research on the relationship between substance use and domestic and family violence has consistently shown that the frequency, severity and impact of violence increases when perpetrators use alcohol and other drugs. Approximately 24% to 54% of domestic violence incidents reported to police in Australia are classed as alcohol-related, with other drugs…
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Physics
Researchers Simulate Novel Metal-Filtered VCSEL Mode Control
Structure of MMF-VCSEL. Credit: Sensors (2024). DOI: 10.3390/s24144700 A study led by researchers from the Changchun Institute of Optics, Precision Mechanics and Physics, Chinese Academy of Sciences, has revealed a new metal-dielectric film mode filter structure that allows for flexible control of the transverse modes of vertical-cavity surface-emitting lasers (VCSELs), demonstrating the potential of metal apertures for enhanced mode control…
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Earth
Earth’s biggest mass extinction event 250 million years ago shows what can happen when El Niño gets out of control
Credit: Pixabay/CC0 Public Domain About 252 million years ago, the Earth suddenly warmed. Over a geologically short period of a few tens of thousands of years, 90% of species became extinct. Even insects, which are rarely affected by such events, suffered devastating losses. The Permian-Triassic mass extinction was the largest of the “Big Five” mass extinctions in Earth’s history. Scientists…
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