Deriving MoS2 nanoribbons from their flakes by chemical vapor deposition

Nanotechnology
Chunxia YangChuanhong Jin

Abstract

Two-dimensional (2D) materials have attracted great interest due to their unique structures and exotic properties related to promising applications and fundamental research. Reducing the dimensionality of 2D materials into their 1D nanostructure is also highly desirable for the exploitation of novel properties and offers new research opportunities. In this work, we demonstrate a bottom-up synthesis of molybdenum disulfides (MoS2) nanoribbons on graphene substrate via chemical vapor deposition (CVD) by precisely tuning the growth parameters into a sulfur-enriched condition. MoS2 nanoribbons are mainly formed from the CVD grown MoS2 flakes along the armchair (AC) direction. Atomic resolution ADF-STEM imaging characterizations show an alternating presence of molybdenum and sulfur zigzag edge terminations at the edges of MoS2 nanoribbons. While at the apex of the nanoribbon, sulfur terminated zigzag edges become dominant. Taking these results together, we revealed the underlying growth mechanism of MoS2 nanoribbons. Electronic transport properties of the MoS2 nanoribbons were also measured by fabricating back-gate-effect transistors (FETs). The nanoribbon FETs present n-type behavior with a current on/off ratio higher than 104 at V...Continue Reading

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Citations

Mar 23, 2021·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Somayeh Gholami Rudi, Samaneh Soleimani-Amiri

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