Two-dimensional materials with nanostructure have been introduced as promising candidates for SERS platform for sensing application. However, dynamic control and tuning SERS remains a long-standing problem. Here, we demonstrated active tuning of enhancement factor of the first and second-order Raman mode of monolayer(1L) MoS2 transferred onto flexible metallic nanotip array. Using mechanical strain, the enhancement factor of 1L MoS2/nanotip is modulated from 1.23 to 8.72 for 2LA mode. For the same mode, the SERS i…