Would a molecular horse trot, pace or glide across a surface? Chemists study quadrupedal molecular machines

To determine how a quadrupedal molecular machine would move across a flat metal surface, chemists studied a class of molecular machines that "walk." Molecular machines can be found everywhere in nature, for example, transporting proteins through cells and aiding metabolism. To develop artificial molecular machines, however, scientists first need to understand the rules that govern mechanics at the molecular or nanometer scale.

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