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 |
顯示於類別: | 期刊論文 |