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(a) Schematic structure of polarized light detector. (b) Photoconductivity parallel and perpendicular to the interface. (c) Photoconductivity anisotropy versus excitation power. (d) Angle-resolved photocurrent as a function of polarization angle measured at 405 nm under zero bias. (e) Experimental polarization ratios of some reported polarized light detectors. (f) Angle-dependent photocurrent of the present device measured at different temperature.
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@Science China Press
Abstract:
Polarization-sensitive photodetectors, based on anisotropic semiconductors, have exhibited wide advantages in specialized applications, such as astronomy, remote sensing, and polarization-division multiplexing. For the active layer of polarization-sensitive photodetectors, recent researches focus on two-dimensional (2D) organic-inorganic hybrid perovskites, where inorganic slabs and organic spacer
A high-tech textile to stay comfortable outdoors - American Chemical Society acs.org - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from acs.org Daily Mail and Mail on Sunday newspapers.
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IMAGE: Thermal imaging shows how a square of the new textile (dashed lines) traps heat in heating mode (top), while reflecting it in cooling mode (bottom). view more
Credit: Adapted from
2021, DOI: 10.1021/acs.nanolett.1c00400
Clothing, from tank tops to parkas, helps people adapt to temperatures outdoors. But you can only put on or take off so much of it, and fluctuations in weather can render what you are wearing entirely inadequate. In a new study in ACS
Nano Letters, researchers describe a high-tech alternative: a reversible textile they designed to trap warmth in the cold and reflect it during hot weather, all while generating small amounts of electricity.
Abstract
Morphing structures are often engineered with stresses introduced into a flat sheet by leveraging structural anisotropy or compositional heterogeneity. Here, we identify a simple and universal diffusion-based mechanism to enable a transient morphing effect in structures with parametric surface grooves, which can be realized with a single material and fabricated using low-cost manufacturing methods (e.g., stamping, molding, and casting). We demonstrate from quantitative experiments and multiphysics simulations that parametric surface grooving can induce temporary asynchronous swelling or deswelling and can transform flat objects into designed, three-dimensional shapes. By tuning the grooving pattern, we can achieve both zero (e.g., helices) and nonzero (e.g., saddles) Gaussian curvature geometries. This mechanism allows us to demonstrate approaches that could improve the efficiency of certain food manufacturing processes and facilitate the sustainable packaging of food, for
Flat-Packed Noodles Create More Sustainable Packaging, Transportation and Storage Aaron Aupperlee
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A team of researchers led by the Morphing Matter Lab is developing flat pasta that forms familiar shapes when it s cooked. Their work is the cover story in this month s issue of Science Advances.
People love pasta for its shapes from tubes of penne and rigatoni to spirals of fusilli and rotini.
But what makes farfalle different from conchiglie also makes the staple a bear to package, requiring large bags and boxes to accommodate the iconic shapes of pastas around the world.
A research team led by the Morphing Matter Lab at Carnegie Mellon University is developing flat pasta that forms into familiar shapes when cooked. The team impresses tiny grooves into flat pasta dough made of only semolina flour and water in patterns that cause it to morph into tubes, spirals, twists and waves when cooked.