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In the 2D material framework, molybdenum disulfide (MoS 2) was originally studied as an archetypical transition metal dichalcogenide (TMD) material. The controlled synthesis of large-area and high-crystalline MoS 2 remains a challenge for distinct practical applications from electronics to electrocatalysis. Among the proposed methods, chemical vapor deposition (CVD) is a promising way for synthesizing high-quality MoS 2 from isolated domains to a continuous film because of its high flexibility. Herein, we report on a systematic study of the effects of growth pressure, temperature, time, and vertical height between the molybdenum trioxide (MoO 3) source and the substrate during the CVD process that influence the morphology, domain size, and uniformity of thickness with controlled parameters over a large scale. The substrate was pretreated with perylene-3, 4, 9, 10-tetracarboxylic acid tetrapotassium salt (PTAS) seed molecule that promoted the layer growth of MoS 2. Further, we characterized the as-grown MoS 2 morphologies, layer quality, and physical properties by employing scanning electron microscopy (SEM), Raman spectroscopy, and photoluminescence (PL). Our experimental findings demonstrate the effectiveness and versatility of the CVD approach to synthesize MoS 2 for various target applications. View Full-Text
Multidisciplinary Digital Publishing Institute
Publication date: 
1 Jan 2020

Pinakapani Tummala, Alessio Lamperti, Mario Alia, Erika Kozma, Luca Giampaolo Nobili, Alessandro Molle

Biblio References: 
Volume: 13 Issue: 12 Pages: 2786