Connecting Research and Experts with Journalists

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This study suggests single-pixel detection as a cost-effective alternative to expensive InGaAs focal plane arrays (FPAs) for near infrared (NIR) hyperspectral imaging. It achieves successful imaging with colloidal quantum dots (CQDs) and a digital micromirror device (DMD) for multiplexing, offering a 600 nm detection window and 8.6 nm spectral resolution at 128 × 128 pixels. This method promises accessible and affordable NIR hyperspectral imaging, broadening its applications.

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Colloidal quantum dots (CQD) are of interest for optoelectronic devices because of the wide energy gap tunability from ultraviolet to infrared wavelengths. This work developed an ionic doping modification that demonstrated the upper wavelength limit for photodetection up to 18 μm on CQD. For 10 μm detector, the detectivity exceeds 109 Jones, with the responsivity of 0.13 A/W. This work is a step toward answering the general question on the CQD photodetection wavelength limitation.

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In a landmark development for environmental conservation, a pioneering plasmonic photocatalyst has been engineered to synergistically degrade the potent pollutants hexavalent chromium (Cr(VI)) and norfloxacin from aquatic environments. This dual-action photocatalyst, leveraging the plasmonic effect and metal-organic framework (MOF) integration, marks a significant leap forward in the quest for efficient and sustainable water purification solutions.

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Exploring quantum heat engines is vital for designing highly efficient power systems beyond classical limits and for understanding quantum thermodynamics. Scientists demonstrate the first implementation of chiral thermodynamic cycles and quantum state transfers in a trapped ion by dynamically encircling a closed loop excluding Liouvillian exceptional points. Their study contributes to understanding non-Hermitian quantum systems with quantum jumps and bridges chirality and quantum thermodynamics, opening avenues for future research and technological innovations in developing chiral quantum devices.

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For the practical application of 2D semiconductors, it is crucial to construct high-quality p-n junctions. Scientist in China developed a low-energy ion implantation system for constructing 2D lateral p-n homojunction. The conductivity type of WS2 was successfully realized to transform from n-type conduction to p-type conduction, and the universality of this method was demonstrated. The photodetector based on WS2 lateral p-n homojunction exhibits satisfactory self-powered photodetection ability. This achievement provides an effective way for controllable doping of 2D materials.

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A new study from the Violence Prevention Research Program at UC Davis suggests that gun-free zones may reduce the risk of mass shootings.

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For the first time since X-rays were discovered, researchers have successfully performed X-ray spectroscopy to identify the element of a single atom at a time. The achievement takes advantage of improvements to synchrotron X-ray light sources.

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New study reveals how an unexpected genetic mechanism influences the evolution of butterfly wing coloration.

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A recent study finds that hope appears to be more beneficial than mindfulness at helping people manage stress and stay professionally engaged during periods of prolonged stress at work. The study underscores the importance of looking ahead, rather than living “in the moment,” during hard times.

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An electro-optic duplex memristor on a GaN/AlScN hetero-structure based Schottky diode has been realized. This two-terminal memristor shows good electrical and opto-electrical nonvolatility and reconfigurability.