Material Synthesis
Hydrothermal Fabrication
of NiSe-GO

Material Characterization

SEM/TEM: Morphology

XRD: Crystallinity

Raman/XPS: Composition

Sensor Fabrication
NiSe-GO/GCE Modification

Electrochemical Investigation

CV: Electroactive Area & Redox Behavior

EIS: Charge Transfer & Kinetics

DPV: Analytical Performance & Optimization

Analytical Figure of Merit
Calibration Curve LOD/LOQ

Real Sample Analysis & Validation

Selectivity Study

Stability & Repeatability

Spiked Urine Sample Analysis

Data Analysis & Conclusion