Metal Velcro
RotJ writes "British scientists have developed technology that can grow structures up to 2 millimetres high and 0.2 millimetres in diameter on metal surfaces. Dubbed Surfi-Sculpt, it 'will act like ultra-strong Velcro to form much tougher joints between metals and lightweight composite materials'."
Did you read the article:
The projections could be used to encourage bone to grow onto artificial hips. They could also be used in electronics to produce heat sinks of just about any shape.