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Chiral colloidal clusters assembled from asymmetric dimers under AC electric fields (peak-to-peak voltage 11 V and 600 Hz). (A) A large field of view of chiral tetramers. (A, Inset) SEM image showing the asymmetric dimer building blocks. (Scale bar: 5 µm.) (B and C) z scans (unit: micrometers, moving away from the bottom substrate) of the right- and left-handed chiral tetramers, respectively.
