A hydrophilic–hydrophobic graphitic carbon nitride@silver hybrid substrate for recyclable surface-enhanced Raman scattering-based detection without the coffee-ring effect

Herein, a hydrophilic–hydrophobic graphitic carbon nitride@silver (g-C 3 N 4 @Ag) hybrid substrate was exploited to inhibit the “coffee-ring phenomenon” in the recyclable detection of dye molecules.