So they're making a disc that can fit in your CD player and will run medical tests for you. The key is to have antibodies bound to gold nanoparticles (see above) that scatter the laser light enough for a CD player to detect. From what I understand there's still a lot to do to fit all the microfluidics on there and make it robust enough, but this demonstration of possibility means someday you could run a test on a CD, put the CD into your CD-ROM drive, and have your computer tell you if you've got a disease or condition or something.
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Gives a whole new meaning to the phrase, "Invest in CD's", doesn't it?
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