1：Experimental Design and Method Selection:

Nanocomposite films were prepared by drop-casting technique after embedding the graphene-DNA fillers in a flexible PDMS matrix using isopropyl alcohol (IPA) as a solvent. The synthesis was optimized to improve the dispersion of the graphene-DNA elements in the polymer matrix.

2：Sample Selection and Data Sources:

Graphene nanopowder grade AO-4 and double-stranded DNA were used as fillers. PDMS Sylgard 184 was used as the polymer matrix. Microscope glass slides were used as substrates for the nanocomposite film deposition.

3：List of Experimental Equipment and Materials:

Graphene nanopowder AO-4, double-stranded DNA, isopropyl alcohol (IPA), two-component PDMS Sylgard 184, microscope glass slides, UV lamp, radiometer, SEM, DSC instrument, optical analyzer.

4：Experimental Procedures and Operational Workflow:

The GNP-DNA fillers were mixed with PDMS and sonicated. The mixture was then drop-casted onto glass substrates and cured. The films were exposed to UV-C radiation and characterized before and after exposure.

5：Data Analysis Methods:

Electrical impedance spectroscopy (EIS) was performed to measure surface electrical resistivity. DSC was used for thermal analysis. SEM and optical microscopy were used for surface morphology analysis. Contact angle measurements were performed to assess surface wettability.