Figure 1. Schematic diagrams of SDNA thin film preparation, molecular structure of DOX, and DOX coordination in SDNA.

(a) Preparation of SDNA sample by magnetic stirring, DOX doping into the SDNA sample, substrate cleaning with O₂ plasma, and fabrication of DOX-doped SDNA thin film via drop-casting. (b) Molecular structure of DOX, and representative scheme of the DOX coordination into SDNA. (All schematic diagrams in this figure were drawn by B. Gnapareddy.)