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Instead of the usual rubbed polyimide alignment layers, they use the in-situ photopolymerization of alkyl acrylate monomers in the presence of nematic liquid crystals to provide a cellular matrix of liquid crystalline droplets in which the chemical structure of the encapsulating polymer controls the liquid crystal alignment. “Small changes in the chemical nature of the polymer will [...] Bi-stable metal sheets might be useful as substrates for rollable screens (e.g. electronic newspaper). The ‘dimpled’ copper-alloy structures are apparently cheap to produce from a single sheet of metal. George Malliaras and coworkers at Cornell created a novel type of organic diode with an “ionic junction” by laminating together layers of an anthracene derivative containing free positive ions and a ruthenium, complex containing negative ions. When the two are joined, ions diffuse across the junction creating a difference in energy levels that facilitates [...] |
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