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In 1848 Louis Pasteur manually separated enantiomorphous three-dimensional crystals. A 2D analogue of this experiment involving clusters of 1-nitronaphthalene bound to a gold surface has been recently performed by the research groups of Berndt and Schneider. The general principles governing separation of enantiomers from 3D crystals to 2D clusters at interfaces, and their characterization, are discussed.
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Lahav et al. (1999) studied this question.
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