Ultrasensitive SERS Profiling of Intracellular Hydrogen Peroxide Release Based on Enzymatic Amplification and Silent-Region Raman Reporter

Surface-enhanced Raman scattering spectroscopy (SERS) has been widely applied to screen biomarkers and biological species due to its high sensitivity; however, severe background noise signals significantly limit its practical application. In this study, we develop an ultrasensitive SERS sensor to determine cellular oxidative stress based on the H