Leave your feedback Share Copy URL https://www.pbs.org/newshour/show/new-3-d-structures-assemble-with-remarkable-precision Email Facebook Twitter LinkedIn Pinterest Tumblr Share on Facebook Share on Twitter Story Devices no wider than a human hair can release liquid and grab microscopic objects on command. But at that size, they are too small to be assembled by human machinery. A team from Brown University and Johns Hopkins University are working on developing three dimensional nano-structures that start as a flat shape and easily fold into a three dimensional structure with the application of heat.