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Schematic representation of the fabrication of the aptasensor for OPN based on the PPy@Ti3C2Tx/PMO12 hybrid: (I) the preparation of PPy@Ti3C2Tx/ PMo12, (II) the aptamer immobilisation, (III) the OPN detection, and (IV) the electrochemical signal read-out [135]. Copyright (2019) Elsevier, reprinted with permission.
