Synthesis of Atomically Thin Transition Metal Ditelluride Films by Rapid Chemical Transformation in Solution Phase
| Autor: | Kaliannan Thiyagarajan, Dong Hyun Lee, Anupam Giri, Monalisa Pal, Woosun Jang, Aloysius Soon, Chulhong Kim, Kilwon Cho, Ranbir Singh, Hee-Seung Yang, Junghyeok Kwak, Unyong Jeong |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
General Chemical Engineering chemistry.chemical_element Nanoparticle Crystal growth 02 engineering and technology General Chemistry Substrate (electronics) Tungsten 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences law.invention chemistry Transition metal Chemical engineering law Monolayer Materials Chemistry Crystallization Thin film 0210 nano-technology |
| Zdroj: | Chemistry of Materials. 30:2463-2473 |
| ISSN: | 1520-5002 0897-4756 |
| Popis: | The controlled synthesis of large-area, atomically thin molybdenum and tungsten ditelluride (MoTe2 and WTe2) crystals is crucial for their emerging applications based on the attractive electronic properties. However, the solution phase synthesis of high-quality and large-area MoTe2 or WTe2 ultrathin films have not been achieved yet. In this study, we synthesized for the first time, large-area atomically thin MoTe2 and WTe2 films in solution phase, through rapid crystal formation directly on a conducting substrate. For the synthesis, we developed a new Te precursor. The crystal growth involves an in situ chemical transformation from Te nanoparticles into MoTe2 or WTe2 thin films. The synthesis enables precise control of the number of atomic layers over a large area, from a monolayer to multilayers. Micropatterned MoTe2 thin films are also readily synthesized in situ using the same process. The photodetector made of 3-layer semiconducting MoTe2 thin films exhibits high photoresponsivity (Rλ) over a broad sp... |
| Databáze: | OpenAIRE |
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