期刊
APPLIED PHYSICS LETTERS
卷 104, 期 26, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4885391
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资金
- Directorate For Engineering
- Div Of Electrical, Commun & Cyber Sys [1028521] Funding Source: National Science Foundation
Uniform growth of pristine two dimensional (2D) materials over large areas at lower temperatures without sacrifice of their unique physical properties is a critical pre-requisite for seamless integration of next-generation van der Waals heterostructures into functional devices. This Letter describes a vapor phase growth technique for precisely controlled synthesis of continuous, uniform molecular layers of MoS2 on silicon dioxide and highly oriented pyrolitic graphite substrates of over several square centimeters at 350 degrees C. Synthesis of few-layer MoS2 in this ultra-high vacuum physical vapor deposition process yields materials with key optical and electronic properties identical to exfoliated layers. The films are composed of nano-scale domains with strong chemical binding between domain boundaries, allowing lift-off from the substrate and electronic transport measurements from contacts with separation on the order of centimeters. (C) 2014 AIP Publishing LLC.
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