Fig. 1From: Surface-enhanced Raman spectroscopy of blood serum based on gold nanoparticles for the diagnosis of the oral squamous cell carcinomaThe SEM image, absorption curve and Raman spectrum of the gold NPs. a The SEM image of the gold NPs. b The UV/visible absorption of the gold NPs and the gold NPs with serum. c SERS spectrum of serum, routine Raman spectrum of serum and background Raman spectrum of the gold NPsBack to article page