Literally, an HIV diagnostic kit made from tape and paper. Seriously, if there was also a mention of a paper clip in there, I’d haf expect MacGyver to be a co-author.
Anyway, here’s a quote from the blog post over at Discover Magazine:
A new device smaller and cheaper than a postage stamp could be used to diagnose diseases in developing countries, Harvard researchers report. The sophisticated microfluidic diagnostic devices, called microPADS, are made out of little more than paper and sticky tape and cost about three cents each. “The starting point with us was asking, ‘What’s the simplest, cheapest [material] we could think of?’ … And that was paper,” [The Scientist] said co-author George Whitesides. (read more)
For those who prefer the technical jargon, this was recently published at PNAS, but I’ve copied the abstract below:
“This article describes a method for fabricating 3D microfluidic devices by stacking layers of patterned paper and double-sided adhesive tape. Paper-based 3D microfluidic devices have capabilities in microfluidics that are difficult to achieve using conventional open-channel microsystems made from glass or polymers. In particular, 3D paper-based devices wick fluids and distribute microliter volumes of samples from single inlet points into arrays of detection zones (with numbers up to thousands). This capability makes it possible to carry out a range of new analytical protocols simply and inexpensively (all on a piece of paper) without external pumps. We demonstrate a prototype 3D device that tests 4 different samples for up to 4 different analytes and displays the results of the assays in a side-by-side configuration for easy comparison. Three-dimensional paper-based microfluidic devices are especially appropriate for use in distributed healthcare in the developing world and in environmental monitoring and water analysis.”