As you may know, crafting a katana is a delicate process that involves carefully constructing a razor-sharp high-carbon edge around a soft shock-absorbent core. One day though, smiths and forging fires could be replaced by electrode-wielding mad-scientists, with the technology to selectively harden and soften metal at will. At least that's what we envisioned when we read about Jörg Weißmüller's breakthrough research in the field of nanomaterials. The German scientist discovered that by placing precious metals in acid he could create tiny ducts through corrosion. Once those channels are flooded with a conductive liquid, electrical currents can be used to harden the material and, if you change your mind about the brittle results, the effect can easily be reversed to make it soft again. The tech could eventually lead to self-healing vehicle armor or scratch-resistant cellphones -- but, really, we just want to zap our way to a high-quality samurai sword. Physorg
AT&T, T-Mobile and Verizon may have all lined up to support the so-called Isis mobile payment system for cellphones, but Sprint has decided to go it alone for various reasons, and it's now saying it plans to beat the others to market. As Bloomberg reports, Sprint is already working with payment networks and handset makers on its own NFC-based system, and it says it plans to roll out the service sometime this year, while Isis has previously stated that it only expects to be ready in 2012. While details are otherwise still fairly light, Sprint says that customers will be able to have purchases billed to their regular credit card statements rather than their phone bill, and that it will rely on alternatives to taking a percentage each transaction for itself as Isis plans to do. Of course, while this is Sprint's latest move in the space, it's far from its first -- in fact, it's been running NFC trials as far back as 2007.
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