Advantages of Engineered Nanosystems Chris Phoenix, Director of Research, CRN Today, biology implements by far the most advanced nanomachines on the planet. It is tempting to think that biology must be efficient, and that we can't hope to design nanomachines with higher performance. But we already know some techniques that biology has never been able to try. This essay discusses several of them and explains why biology could not use them, but manufactured nanomachines will be able to. Low Friction Via Superlubricity Imagine you're pulling a toy wagon with square wheels. Each time a wheel turns past a corner, the wagon lurches forward with a thump. This would waste substantial amounts of energy. It's as though you're continually pulling the wagon up tiny hills, which it then falls off of. There's no way to avoid the waste of energy. At the molecular scale, static friction is like that. Forces between the molecules cause them to stretch out of position, then snap into a new configuration. The snap, or clunk, requires energy�which is immediately dissipated as heat. In or......

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