  We study molybdenum disulfide (MoS2) structures generated by folding single-
and bilayer MoS2 flakes. We find that this modified layer stacking leads to a
decrease in the interlayer coupling and an enhancement of the photoluminescence
emission yield. We additionally find that folded single-layer MoS2 structures
show a contribution to photoluminescence spectra of both neutral and charged
excitons, which is a characteristic feature of single-layer MoS2 that has not
been observed in multilayer MoS2. The results presented here open the door to
fabrication of multilayered MoS2 samples with high optical absorption while
maintaining the advantageous enhanced photoluminescence emission of
single-layer MoS2 by controllably twisting the MoS2 layers.
