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. 2015 Jul 31;5:12722. doi: 10.1038/srep12722

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(a) FTIR absorption spectra of DOX-doped SDNA thin films in the wavelength range from 4000 to 700 cm⁻¹. The colour lines indicate SDNA absorption spectra with various concentrations (10, 20, 30, 40, and 50 μM) of DOX as well as pristine SDNA. (b) Variation of current-voltage characteristics of DOX-doped SDNA thin films as a function of DOX concentration.