Oxidation of two-dimensional (2D) transition metal dichalcogenides have received great interests because
it significantly influences their electrical, optical, and catalytic properties. Monoclinic MoO2 nanowires
grow along the zigzag direction of 2D MoS2 via thermal annealing at a high temperature with a low
oxygen partial pressure. The hybrids of semiconducting 2D MoS2 and metallic 1D MoO2 nanowires have
potential to be applied to various devices such as electrical devices, gas sensors, photodetectors, and
catalysts.