<p><b>Comprehensive resource covering rapid scientific and technological development of polymorphic two-dimensional transition-metal dichalcogenides over a range of disciplines and applications</b><p><i>Two-Dimensional Transition-Metal Dichalcogenides: Phase Engineering and Applications in Electronics and Optoelectronics</i> provides a discussion on the history of phase engineering in 2D-TMDs as well as an in-depth treatment on the structural and electronic properties of 2D-TMDs in their respective polymorphic structures. The text addresses different forms of in-situ synthesis, phase transformation, and characterization methods for 2D-TMD materials and provides a comprehensive treatment of both the theoretical and experimental studies that have been conducted on 2D-TMDs in their respective phases. <p><i>Two-Dimensional Transition-Metal Dichalcogenides</i> includes further information on: <ul><li>Thermoelectric, fundamental spin-orbit structures, Weyl semi-metallic, and superconductive