1879 of 3588


July 12, 2010
"Polymazing" The combination of polyethylene glycol (PEG) and polydimethylsiloxane creates what Ye Jin "Jenna" Eun calls a "sandwich of polymers." But when the University of Wisconsin, Madison, doctoral student added water to her creation, it was clear the union of these polymers didn't emulate peanut butter and jelly's happy marriage. PEG wants to expand when it encounters water, but the stiffer polyethylene copolymer won't permit it. So PEG stretches vertically instead, creating the hills and valleys seen here. The contortions make the polymer combo unusable for the original purpose: mounting cell samples. But Eun, who works under the direction of biochemist Douglas Weibel, says the result of the failed experiment was so beautiful, she photographed the image. She used a Zeiss stereoscope and a Nikon CCD camera. This image was tied for Honorable Mention in the Photography category of the 2008 Science and Engineering Visualization Challenge. The competition is sponsored by the National Science Foundation and the journal Science. To learn more about the Science and Engineering Visualization Challenge competition, see the SciVis Special Report Here . (Date of Image: 2008)

comments powered by Disqus