Fracture‐induced nanoscrolls from CVD‐grown monolayer molybdenum disulfide

We report a simple and effective way of fabricating molybdenum disulfide (MoS 2 ) nanoscrolls by self‐rolling up fractured monolayer CVD‐grown MoS 2 microflakes. Morphological results reveal that MoS 2 nanoscrolls are formed only at newly formed edges, owing to an orientation‐specific fracture behavior. Using Raman spectroscopy, we show that the E 1 2g Raman peak (A 1g peak) for MoS 2 nanoscrolls significantly red‐shifts (blue‐shifts), indicating structural change. The proposed mechanism is that the newly formed edges induced by fracture behavior self‐roll up to nanoscrolls to minimize the surface free energy, meanwhile, the serious lattice contradiction of upper sulfur plane controls the rolling directions. (© 2016 WILEY‐VCH Verlag GmbH &Co. KGaA, Weinheim)