“…Surface-enhanced Raman spectroscopy (SERS), which depends on the electromagnetic mechanism (EM) and chemical mechanism (CM), is an indispensable candidate method for detecting molecules with extremely high sensitivity, and intensively applied in cross-disciplinary fields including chemistry, biology, agriculture and archaeology. [1][2][3][4][5] The EM is attributed to the local electromagnetic fields augmented by local surface plasmon resonance (LSPR) with superior SERS performance, while the CM is mainly induced by the charge transfer associated with complementary effects, say, molecule resonance, exciton resonance, Mie resonance, 6 etc., between the substrate and the molecule. [7][8][9][10][11] Nevertheless, the practical application of EMbased noble metal SERS substrates is hindered by poor surface uniformity, stability and biocompatibility.…”