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Liquid Crystal Nano-Flowers
The nanoscale structures of liquid crystals are rarely more exotic
than that of the sponge phases of bent-core molecules, visualized here in an
electron microscope image made by researchers at the Liquid Crystal Materials
Research (MRSEC) Center of the University of Colorado, Boulder. The image shows a plant stalk-like network
that gives the appearance of a grayscale photo of dense tropical foliage, but here the stalk
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Room-Temperature Ferroelectricity in Croconic Acid Films
Molecular ferroelectrics have the potential to become viable material alternatives to inorganic ferroelectrics. Unlike traditional oxide ferroelectrics, molecular ferroelectrics are structurally flexible, can be engineered at the molecular level, and can be assembled on nearly any surface, including flexible sheets and fabrics. The application of molecular ferroelectrics hinges, however, on the availability of strategies to fabricate thin films with defined structure and morphology on a large scale, which at the same time preserve their ferroelectric properties.
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Detecting Magnetic Order when Magnetization is Absent
Antiferromagnets are magnetically ordered materials which lack the net magnetization known for ferromagnets. In an antiferromagnet, spins arrange in opposing sublattices with mutually compensating magnetization. Not unlike ferromagnets, antiferromagnets can have domains. In a simple case, the domains are differentiated through spin reversal. Identifying a specific antiferromagnetic domain is a notoriously difficult experimental problem.
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