Synthesis of MoSe₂ flower-like nanostructures and their photo-responsive properties

Novel MoSe₂ flower-like nanostructures were produced by a facile hydrothermal method. Devices containing such nanostructures were also fabricated and reveal obvious photo-responsive characteristics. SEM and HRTEM images show that the as-prepared products have a flower-like structure, and the diameter of a single particle is about 500 nm. The average atomic ratio between Se and Mo is 2.68 according to the results of the EDS measurements. The photo-responsive characteristics responding to red illumination of a device with MoSe₂ flower-like nanostructures were investigated for the first time and a mechanism for the photoresponse was proposed. Our findings reveal that such nanostructures have excellent electric conductivity and new photo-responsive properties.