Journal Article 2D materials epitaxial self-planarization metal chalcogenides 81AH48963U 9007-49-2 Bis-Trimethylammonium Compounds DNA Disulfides Molybdenum Research Support, Non-U.S. Gov't Review ZC8B4P503V cethyltrimethylammonium chloride chemical transformations epitaxial growth molybdenum disulfide photodetectors solution-based synthesis solution-phase synthesis ternary metal chalcogenides thin films thin films of 2D materials transfer-free device fabrication transition metal dichalcogenides two-dimensional ferromagnets van der Waals magnetic materials wafer-scale single-crystal thin films