A coat of nanoparticles can prevent a popular lab-made capsule from fusing with its neighbors in solution and losing its structure, researchers report.
Liposomes are hollow, spherical capsules made from phospholipids, the same components found in cell membranes. They can be used to carry drugs or other biological cargo. But individual liposomes are fragile and tend to fuse into blobs after a couple of days, spilling their contents prematurely in the process, says Steve Granick of the University of Illinois at Urbana-Champaign. “We want to keep them discrete,” he says.