Nanocleansers

I have to admit, I'm completely fascinated with anything related to nano-technologies. Today's gnarly-nano moment comes courtesy of potassium manganese oxide fibers (wtf?). Scientists at MIT have crafted sheets of this stuff which acts like a paper towel for oil and basically sucks up oil and nothing else (even pulling it from water). It was designed to pick up oil from the oceans and does so remarkably well - it can hold up to 20 times its weight in oil. Oil that can later be extracted and used. Plus, it's apparently affordable to produce and it's recyclable.

Stellacci explained that there are other materials that can absorb oils from water, "but their selectivity is not as high as ours." In other words, conventional materials still absorb some water, making them less efficient at capturing the contaminant.

The new material appears to be completely impervious to water. "Our material can be left in water a month or two, and when you take it out it's still dry," Stellacci said. "But at the same time, if that water contains some hydrophobic contaminants, they will get absorbed."

Made of potassium manganese oxide, the nanowires are stable at high temperatures. As a result, oil within a loaded membrane can be removed by heating above the boiling point of oil. The oil evaporates, and can be condensed back into a liquid. The membrane--and oil--can be used again.

Link to MIT News which has a short video
Link to the post on gizmodo

If you have a nano fetish like me, you may also like the blog behind my first post ever - io9