  Molybdenum disulfide (MoS2) has been attracting extraordinary attention for
its intriguing optical, electronic and mechanical properties. Here we
demonstrate hybrid, organic-inorganic light-emitting nanofibers based on MoS2
nanoparticle dopants obtained through a simple and inexpensive sonication
process in N-methyl-2-pyrrolidone and successfully encapsulated in polymer
filaments. Defectiveness is found to be kept low, and stoichiometry preserved,
by the implemented, gentle exfoliation method that allows the MoS2
nanoparticles to be produced. So-achieved hybrid fibers are smooth, uniform,
flawless, and exhibit bright and continuous light emission. Moreover, they show
significant capability of waveguiding self-emitted light along their
longitudinal axis. These findings suggest the use of emissive MoS2 fibers
enabled by gentle exfoliation methods as novel and highly promising optical
material for building sensing surfaces and as components of photonic circuits.
