DataVXChemistry of MaterialsPaper
journal article·2020-07-14

Na2SO4-Regulated High-Quality Growth of Transition Metal Dichalcogenides by Controlling Diffusion

Yuanyuan Jin, Miao Cheng, Hang Liu, Miray Ouzounian, Travis Shihao Hu, Bingying You, Gonglei Shao, Xiao Liu, Yeru Liu, Huimin Li, Shisheng Li, Jie Guan, Song Liu

Chemistry of Materials· Volume 32· Issue 13
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Source abstract

Abstract

The high diffusion rate of sulfur with respect to metal oxide creates precursors that deviate from the stoichiometric ratio, leading to poor growth controllability and defects in the as-grown transition metal dichalcogenides (TMDCs). The introduction of a sulfur precursor with a high melting point is a hopeful strategy to solve these problems. Here, we first introduce sodium sulfate (Na2SO4) as a sulfur precursor, which plays roles in tuning diffusion of source precursors and balancing their mass flux based on the temperature-confined decomposition of Na2SO4. We deduced the specific growth process by characterizing the composition of intermediates; the results show that emissions of sulfur and metal sources were synchronously released and spanning the entire growth stage. This temperature-controlled source-feeding system reduced the diffusion gap between sulfur and metal, which promoted a faster kinetics for reactions. Moreover, this method has the wide applicability for producing other TMDCs.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: 2D Materials and Applications · Perovskite Materials and Applications · MXene and MAX Phase Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Institute of Chemical Biology and Nanomedicine (ICBN), State Key Laboratory of Chem/Bio-Sensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P. R. China

School of Physics, Southeast University, Nanjing 211189, P. R. China

Department of Mechanical Engineering, California State University, Los Angeles, California 90032, United States

International Center for Young Scientists (ICYS), National Institute for Materials Science (NIMS), Tsukuba 305-0044, Japan

Funding

Ministry of Education of the People's Republic of China · Natural Science Foundation of?Hunan Province · Division of Human Resource Development · Government of Jiangsu Province · National Natural Science Foundation of China · Southeast University

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