Transition Metal Dichalcogenides (TMDs) are a class of materials composed of transition metals and chalcogen elements, typically sulfur, selenium, or tellurium. They have a layered structure, allowing them to be easily exfoliated into thin films. TMDs exhibit unique electronic and optical properties, making them valuable for applications in electronics, photonics, and energy storage. These materials can exist in different phases, such as semiconducting or metallic, depending on their composition and structure. Notable examples of TMDs include MoS2, WS2, and TiSe2. Their versatility and tunable properties have sparked significant interest in research and technology development.