the effect of concentration and time of hydrothermal process on the fluorescent property of molybdenum diselenide nano-layers

The group of 2d materials contains almost all the elements of the periodic table. in contrast to the graphene sheet, they are abundant, this creates a variety of electronic properties including metals, semimetals, insulators and semiconductors. band gaps of these materials are direct or indirect by ranging from ultraviolet to infrared, for this reason, have received much attention for nanoelectronics, optoelectronics and flexible devices. in this study, by a simple hydrothermal method, which is a bottom-up approach, molybdenum diselenide two-dimensional layers were synthesized. the samples were analyzed by x-ray diffraction spectroscopy, and the compound molybdenum diselenide was confirmed for the samples synthesized, and also with uv-visible spectroscopy (uv-vis) to study the absorption spectrum and fluorescence spectroscopy of fluorescence (pl) to investigate the properties of fluorescent, the nanoparticles were studied, and found that, by changing the concentration and time of hydrothermal process, the intensity of emission changes. scanning electron micrographs indicate the size of 100 nanometers for particles synthesized.