Research News: The self-assembly of organic molecules into fibers (e.g
. see Fig.) is reversible. In the dreams of chemists the exploitation
of this phenomenon could lead, for example, to the use of bio-compatib
le fibrous organics to simulate blood clots. Dissolution of the clot c
ould be affected thermally or chemically. Recently developed technolog
y which could make this sort of thing possible in the future is review
ed.