from New Scientist
Micro-sculptures give metal the Velcro touch
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An interesting method of joining different materials without the use of adhesive. This is achieved by etching the surfaces with a controlled electron beam which melts the surface. And in moving the beam in a very specific manner and speed, regular projections are left on the surface which acts as "hooks" for "adhesion" to take place between treated surfaces. See a close up graphics of the process here.