(2D) semiconductor compounds is desirable for
many applications. Here, by electrochemically intercalating
lithium into 2D molybdenum disulfide (MoS2) nanoflakes,
plasmon resonances in the visible and near UV wavelength
ranges are achieved. These plasmon resonances are controlled
by the high doping level of the nanoflakes after the
intercalation, producing two distinct resonance peak areas
based on the crystal arrangements. The system is also
benchmarked for biosensing using bovine serum albumin.
This work provides a foundation for developing future 2D
MoS2 based biological and optical units.