Micromachines: Magnetic Helical Micromachines: Fabrication, Controlled Swimming, and Cargo Transport (Adv. Mater. 6/2012)Micromachines: Magnetic Helical Micromachines: Fabrication, Controlled Swimming, and Cargo Transport (Adv. Mater. 6/2012)A simple and general fabrication method for magnetic helical micromachines with or without claw-like protrusions is reported by Li Zhang and co-workers on page 811. The dynamics of motion control reveal that corkscrew motion can always be generated when the input frequency of the rotating magnetic field is sufficiently high. The micromachines exhibit excellent swimming behavior, low cytotoxicity, and are capable of 3D cargo transport in fluid.
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Porous Materials: Energy-Efficient Dehumidification over Hierachically Porous Metal–Organic Frameworks as Advanced Water Adsorbents (Adv. Mater. 6/2012)The energy-efficient dehumidification over hier-archically porous metal-organic frameworks (MOFs) with hydrothermal stability is reported on page 806 by Jong-San Chang and co-workers. Their promising water sorption properties lead to a new type of advanced water adsorbents for the effective utilization of low-grade thermal energy as well as solar energy. These MOFs would be potential alternatives to commercial water adsorbents, which are used for industrial or indoor desiccant applications such as desiccant dehumidifiers/humidifiers, gas dryers, adsorptive air-conditioning systems, fresh water production, and adsorption heat transformation.