Molecular machine part2

 In the other day, I introduced a field of molecular machine. Today, I will explain the field in detail. Before a detail explanation, I want to confirm that a purpose of the field of molecular machine is to make molecular system which has unidirectional motion. This purpose makes chemists come up with supramolecules like rotaxane, catenane, and so on. Here, I want to explain that how these molecules move. There are two types of mechanisms in supramolecule motion, which is chemical affinity and steric obstacle. In following time, I will explain these two mechanisms in detail. See you.