A twisted dumbbell-like chiral superstructure can be easily assembled in aragonite under the co-action of CTAB and Mg, producing a microstructure that is very similar to that of shell. Asymmetric adsorption of the CTAB head group on aragonite, namely "adsorption chirality", is the reason for the chiral assembly.

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http://dx.doi.org/10.1039/d2cc06615gDOI Listing

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