標題: Atomic-Scale Fabrication of In-Plane Heterojunctions of Few-Layer MoS2 via In Situ Scanning Transmission Electron Microscopy
作者: Tai, Kuo-Lun
Huang, Chun-Wei
Cai, Ren-Fong
Huang, Guan-Min
Tseng, Yi-Tang
Chen, Jun
Wu, Wen-Wei
交大名義發表
材料科學與工程學系
National Chiao Tung University
Department of Materials Science and Engineering
關鍵字: atomic-scale;few-layer MoS2;heterojunctions;in situ scanning;transmission electron microscopy (STEM;TEM);nanofabrications
公開日期: 1-一月-1970
摘要: Layered MoS2 is a prospective candidate for use in energy harvesting, valleytronics, and nanoelectronics. Its properties strongly related to its stacking configuration and the number of layers. Due to its atomically thin nature, understanding the atomic-level and structural modifications of 2D transition metal dichalcogenides is still underdeveloped, particularly the spatial control and selective precision. Therefore, the development of nanofabrication techniques is essential. Here, an atomic-scale approach used to sculpt 2D few-layer MoS2 into lateral heterojunctions via in situ scanning/transmission electron microscopy (STEM/TEM) is developed. The dynamic evolution is tracked using ultrafast and high-resolution filming equipment. The assembly behaviors inherent to few-layer 2D-materials are observed during the process and included the following: scrolling, folding, etching, and restructuring. Atomic resolution STEM is employed to identify the layer variation and stacking sequence for this new 2D-architecture. Subsequent energy-dispersive X-ray spectroscopy and electron energy loss spectroscopy analyses are performed to corroborate the elemental distribution. This sculpting technique that is established allows for the formation of sub-10 nm features, produces diverse nanostructures, and preserves the crystallinity of the material. The lateral heterointerfaces created in this study also pave the way for the design of quantum-relevant geometries, flexible optoelectronics, and energy storage devices.
URI: http://dx.doi.org/10.1002/smll.201905516
http://hdl.handle.net/11536/153359
ISSN: 1613-6810
DOI: 10.1002/smll.201905516
期刊: SMALL
起始頁: 0
結束頁: 0
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