| Summary: | 碩士 === 國立中央大學 === 物理學系 === 101 === Separation of molecules with opposite chiralities is important topic in industry and science. An object, which is not identical to its mirror image, has chirality and is also called enantiomer. Hydrodynamic provided an alternative approach to separate chiral objects without chemical reaction. Fluid flows could apply opposite forces to objects with opposite chiralities. Recent researches about the chiral separation have focused on the difference of net effects which shear flows apply to enantiomers and neglect the interaction between objects which is not important in dilute solution.
In order to observe the interaction directly, we build a system providing a periodically stirring flow to drive chiral objects. It is first confirmed that single objects of opposite chiralities have the same motion in this system. The motions could also be controlled by heating or cooling of the system.
In the case of two objects, the individual motions of the objects in identical or opposite pairs are mostly the same with those of a single one. In heating process the motions of them are almost independent. On the other hand, they tend to have the same loop size in cooling process, and identical pair have smaller relative distance than opposite one. It implies that the identical pair has relatively large attractive interaction to each other than opposite one.
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