Few-layer MoS2 dendrites as a highly active humidity sensor

Few-layer molybdenum disulfide (MoS2) transition metal chalcogenides (TMDCs) have been prepared, and their morphology has been widely investigated due to their moisture sensitivity properties. However, developing the design of MoS2 has made slow progress. This study introduces an improved chemical vapor deposition method to grow dendritic MoS2 nanomaterials. The grown MoS2 crystals have a dendritic shape with fractal and schedulable patterns. These morphologies are mainly initiated from the growth of double defects, and are regulated by S: Mo vapor ratio by characterizing their atomic structure. This study enhances the understanding of the growth mechanism of twin-derived crystals, extends their application from nanomaterials to 2D crystals, and provides a powerful and controllable method for small transition metal sulfide TMDCs. Shape engineering methods in electrochemical applications have evolved.