Choudhary, Nitin Park, Juhong Hwang, Jun Yeon Chung, Hee-Suk Dumas, Kenneth H. Khondaker, Saiful I. Choi, Wonbong Jung, Yeonwoong 2024-01-20T04:04:19Z 2024-01-20T04:04:19Z 2021-09-05 2016-05-05 2045-2322 https://pubs.kist.re.kr/handle/201004/124075 Two-dimensional (2D) van der Waal (vdW) heterostructures composed of vertically-stacked multiple transition metal dichalcogenides (TMDs) such as molybdenum disulfide (MoS2) and tungsten disulfide (WS2) are envisioned to present unprecedented materials properties unobtainable from any other material systems. Conventional fabrications of these hybrid materials have relied on the low-yield manual exfoliation and stacking of individual 2D TMD layers, which remain impractical for scaled-up applications. Attempts to chemically synthesize these materials have been recently pursued, which are presently limited to randomly and scarcely grown 2D layers with uncontrolled layer numbers on very small areas. Here, we report the chemical vapor deposition (CVD) growth of large-area (>2 cm(2)) patterned 2D vdW heterostructures composed of few layer, vertically-stacked MoS2 and WS2. Detailed structural characterizations by Raman spectroscopy and high-resolution/scanning transmission electron microscopy (HRTEM/STEM) directly evidence the structural integrity of two distinct 2D TMD layers with atomically sharp vdW heterointerfaces. Electrical transport measurements of these materials reveal diode-like behavior with clear current rectification, further confirming the formation of high-quality heterointerfaces. The intrinsic scalability and controllability of the CVD method presented in this study opens up a wide range of opportunities for emerging applications based on the unconventional functionalities of these uniquely structured materials. English NATURE PUBLISHING GROUP TRANSITION-METAL DICHALCOGENIDES RAMAN-SCATTERING MONOLAYER MULTILAYER PHOTOLUMINESCENCE ABSORPTION BULK Centimeter Scale Patterned Growth of Vertically Stacked Few Layer Only 2D MoS2/WS2 van der Waals Heterostructure Article 10.1038/srep25456 1 SCIENTIFIC REPORTS, v.6 SCIENTIFIC REPORTS 6 scie scopus 000375542700002 2-s2.0-84966269076 Multidisciplinary Sciences Science & Technology - Other Topics Article TRANSITION-METAL DICHALCOGENIDES RAMAN-SCATTERING MONOLAYER MULTILAYER PHOTOLUMINESCENCE ABSORPTION BULK Heterostructure CVD growth 2D TMD