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출처 : Technolog Review

Diagnosing Disease with Paper and Tape

By adding tape, researchers can make more-complex tests.

By Kristina Grifantini

On the desk of Harvard University professor George Whitesides are white sheets the size of stamps. Each is inlaid with a different pattern: a four-leaf flower, concentric circles surrounding four dots, a six-pointed burst. These prototypes are diagnostic tests made from a cheap, universally available substrate: paper. With the simple addition of tape, Whitesides and his group have been able to turn their paper tests into three-dimensional devices, allowing for more-complicated analysis. Such paper "lab on a chip" tests may lead to a cost-effective, portable, and accurate method for diagnosing diseases in countries lacking reliable health care.

Whitesides holds up his group's latest development: a square slightly thicker than the other samples, covered in a grid of yellow, greed, red, and blue dots. This prototype is made up of layers of patterned paper, between which are waterproof double-sided tape. By layering the squares and connecting them with tape adhesive, the group is able to channel liquid horizontally and vertically in a very small area, as detailed in this week's Proceedings of the National Academy of Sciences.....계속

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