Programmable matter is probably not the next technological revolution,
nor even perhaps the one after that. But it's coming, and when it does,
it will change our lives as much as any invention ever has. Imagine
being able to program matter itself-to change it, with the click of a
cursor, from hard to soft, from paper to stone, from fluorescent to
super-reflective to invisible. Supported by companies ranging from Levi
Strauss to IBM and the Defense Department, solid-state physicists in
laboratories at MIT, Harvard, Sun Microsystems, and elsewhere are
currently creating arrays of microscopic devices called quantum dots
that are capable of acting like programmable atoms. They can be
configured electronically to replicate the properties of any known atom
and then can be changed, as fast as an electrical signal can travel, to
have the properties of a different atom. Soon it will be possible not
only to engineer into solid matter such unnatural properties as variable
magnetism, programmable flavors, or centuple bonds far stronger than
diamond, but also to change these properties at will. Wil McCarthy
visits the laboratories and talks with the researchers who are
developing this extraordinary technology; describes how they are
learning to control its electronic, optical, thermal, magnetic, and
mechanical properties; and tells us where all this will lead. The
possibilities are truly magical.