1：Experimental Design and Method Selection:

The study employs a two-step template growth method where phosphorene serves as both template and reductant for in situ synthesis of noble metal nanoparticles. The design rationale is to create dense nanoparticle packing with nanogap structures to generate SERS 'hot spots'.

2：Sample Selection and Data Sources:

Phosphorene is prepared from bulk BP crystals via electrochemical exfoliation. Analytes include Rhodamine 6G (R6G), thiabendazole, and thiram solutions at various concentrations.

3：List of Experimental Equipment and Materials:

Materials include bulk BP crystals, HAuCl4, AgNO3, DMF, ethanol, Milli-Q water. Equipment includes IT6123B DC power supply, H-type electrolytic cell, Sigma FE-SEM, JEM-3200FS TEM, Lambda 25 UV-Vis spectrophotometer, ESCALAB 250Xi XPS, LabRam HR VIS Raman microscope.

4：Experimental Procedures and Operational Workflow:

Phosphorene is exfoliated electrochemically, then metal precursors are sequentially added to form nanocomposites on Si substrates. SERS measurements are performed after soaking substrates in analyte solutions.

5：Data Analysis Methods:

SEM/TEM image analysis with Image J software, XPS for chemical composition, UV-Vis for absorption, Raman spectroscopy for SERS signals with statistical analysis of peak intensities and RSD calculations.