Synthesis of Molybdenum Disulfide Nanowire Arrays Using a Block Copolymer Template

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• 作者：Wei Wei ; Leith Samad ; Jonathan W. Choi ; Yongho Joo ; Austin Way ; Michael S. Arnold ; Song Jin ; Padma Gopalan
• 刊名：Chemistry of Materials
• 出版年：2016
• 出版时间：June 14, 2016
• 年：2016
• 卷：28
• 期：11
• 页码：4017-4023
• 全文大小：578K
• 年卷期：0
• ISSN：1520-5002

文摘

A simple route for the synthesis of arrays of sub-20-nm-wide molybdenum disulfide (MoS₂) nanowires using a self-assembled cylinder forming poly(styrene-b-2-vinylpyridine) thin films is demonstrated. The protonated 2-vinylpyridine selectively seeds molybdenum precursors in the aqueous solution, and the precursors are converted to molybdenum sulfide during a sulfur annealing process. An ultraviolet cross-linking step is introduced to ensure the successful transfer of the morphologies of the block copolymer templates to the MoS₂ nanowires. The nanowires transition from an amorphous to a crystalline MoS₂ phase upon thermal annealing in the presence of sulfur, as confirmed by X-ray photoelectron spectroscopy, Raman spectroscopy, X-ray diffraction, and transmission electron microscopy. This work provides a pathway to large area, dense, spatially localized arrays of transition metal dichalcogenide nanowires for catalytic and sensing applications.