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Taking a tip from living beings, researchers
have fashioned tiny channels and valves out
of soft materials that shrink and swell. The
microfluidic systems, made from responsive
hydrogels, can control flow based on pH level.
The first application of the technology could
save you from food poisoning.
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Security
comes one photon at a time
Cracking the world's best encryption schemes will likely be child's play for quantum computers, but quantum cryptography could render those schemes unnecessary. Two single-photon emitters set the stage for the ultimate in security.
Shining
a new light on electron spin
When colored lights shine, there's electricity in the air. A proposal to get electrons dancing in laser light could go a long way toward making practical quantum computers.
Network
similarities run deep
Networks, from the Web to who knows who in Hollywood to the inner workings of cells, look remarkably alike, mathematically speaking. And in every case, there are those special few individuals who get all the attention.
Transistor
lights up
In the ongoing quest to coax laser light from organic materials, researchers at Bell Labs have made a transistor that shines.
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