1：Experimental Design and Method Selection:

The synthesis involves a three-step process: chemical bath deposition for ZnO nanorods, DC magnetron sputtering for Ag deposition, and thermal evaporation for CuSe deposition. Characterization methods include XRD, FE-SEM/EDX, UV-Vis-NIR spectrophotometry, and current-voltage measurements. Photocatalytic performance is evaluated using Rhodamine B degradation under UV-Vis light.

2：Sample Selection and Data Sources:

Samples are grown on Si, quartz, and FTO substrates. ZnO seed layer is deposited by RF magnetron sputtering. Binary heterostructures (ZnO/CuSe and ZnO/Ag) are also prepared for comparison.

3：List of Experimental Equipment and Materials:

Equipment includes XRD (D8 ADVANCE), FE-SEM (Hitachi S-4800, JSM-6330F), UV-Vis spectrophotometer (Avantes-Spec2048), relectance ellipsometry (LEOI-44 model), and semiconductor parameter analyzer (Keithley 2400). Materials include zinc nitrate hexahydrate, HMTA, Ag, CuSe mixture, RhB solution, and Hg lamp.

4：0). Materials include zinc nitrate hexahydrate, HMTA, Ag, CuSe mixture, RhB solution, and Hg lamp. Experimental Procedures and Operational Workflow:

4. Experimental Procedures and Operational Workflow: ZnO NRs are grown via CBD, Ag is sputtered, and CuSe is evaporated. Samples are characterized structurally and morphologically. Photocatalytic tests involve immersing samples in RhB solution under light irradiation and measuring absorption changes.

5：Data Analysis Methods:

Data is analyzed using XRD patterns, SEM images, EDX spectra, J-V curves, and Langmuir-Hinshelwood model for degradation kinetics.