SERS enhancement factors and plasmonic nanostructures for different references.

Reference	SERS EF	Plasmonic nanostructure
Wang et al., Sci. Adv., 2021 (ref. 16)	∼107	Ag nanocube
Zhu et al., Small, 2022 (ref. 56)	∼108	Ag nanovoid array
Liu et al., Adv. Opt. Mater., 2022 (ref. 17)	∼108	Au nanomesh array
This work	∼1010–∼1011	Au heart-shaped dimer