Table 2. Comparison of enhancement factors (EF) and limits of detection (LOD) for G-AgNPs-based SERS substrates detecting Rh6G.

LOD (M)	EF (at LOD or equivalent)	Publication year	Remarks	References
10−10	106–108	2005	Self-assembled Ag NPs on silicon nanotips, high surface area for near-field amplification	68
Not specified	8 × 1010	2013	Two-dimensional netlike Ag nanowires, interparticle junctions and network structures	69
<10−9	∼8 × 108	2016	Laser-deposited drop-shaped Ag nanostructures on silicon, dense hotspots from erosion torches	70
10−7	∼106	2008	Silver aggregates, interparticle coupling	71
10−11	1.5 × 107	2021	Ag@SiO2 nanospheres, improved stability and ordered arrangement	72
10−8	2.3 × 107	2016	Truncated nanotriangular Ag NPs, shape-enhanced LSPR.	48
Not specified	∼105–106	2018	Thiol-immobilized polymer-capped Ag NPs on Si(100), high reproducibility	73
10−9	Not specified	2025	3D Ag nanoflowers with nano-gaps, salt-enhanced sensitivity	74
10−9	1.12 × 107	2019	Tunable Ag NP arrays on nanocones, uniform gaps via hot embossing	61
10−9	∼106–107	2021	Ag-decorated Si nanowires, optimized for dye discrimination	75
10−10	1.92 × 106	2022	Ag NPs on silicon pyramids, uniform deposition and anti-aggregation	66
10−9	Not specified	2019	Ag-decorated horizontal Si nanowires, moderate enhancement with careful design	76
10−9	8.31 × 107 (at 1360 cm−1)	2025	Glucose-stabilized, microplasma-synthesized, bimodal morphology	This work