With CL from 500 to 3000 nt nM, A 650/520 values for 12 nt and 6 nt lengths decrease and the difference reaches the maximum at 1200 nt nM, which is quite significant ( Fig. 1 I).
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MnO<sub>2</sub>@Au nanostructures supported colorimetric biosensing with duplex-specific nuclease-assisted DNA structural transition.
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