'Chirality’ is derived from the Greek word for hand, and is given to describe something that cannot be superimposed on its mirror image form. Left and right hands can be described as chiral because they are non-superimposable mirror images – if you hold out both hands with palms facing upwards and lay them directly on top of each other, the thumb of one hand would be over top of the little finger.
Figure: (a) Unit cell of the Im3m cubic liquid crystalline phase; the three networks are coloured blue, yellow and red.1 (b) The middle network (yellow in (a)) represented as twisted ribbons with the black rods symbolising the rod-like molecules.
Dressel et al. Dynamic Mirror-Symmetry Breaking in Bicontinuous Cubic Phases. Angew. Chem. Int. Ed. 53, 13115-20 (2014). DOI: 10.1002/anie.201406907
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