Chemical vapor deposition growth of large-area molybdenum disulphide (MoS2) dendrites

IF 5.45 Q1 Physics and Astronomy Nano-Structures & Nano-Objects Pub Date : 2024-10-19 DOI:10.1016/j.nanoso.2024.101380

Mahima Tyagi , Aman Abhishek Tiwari , Srijata Dey , Deshdeep Sahdev

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Abstract

Molybdenum disulphide (MoS₂) has emerged as a popular transition metal dichalcogenide (TMDC) in the recent decade because of its potential applications in electronic devices, optoelectronics, and fuel cells. Specifically, dendritic MoS₂ has been shown to efficiently catalyse various hydrogen evolution reactions. We report the growth of dendritic MoS₂ flakes on SiO₂/Si wafers using a sophisticated atmospheric pressure chemical vapor deposition (APCVD) system. High-resolution optical microscopy reveals a morphology comprising different star-shaped dendrites, in addition to large MoS₂ domains, which merge to form a continuous film. Our observations reveal that the dendrites originate from the nucleation centre of a monolayer MoS₂ island, and their branches develop preferentially along the grain boundaries of this island. Raman spectroscopy, Atomic force microscopy (AFM), Field emission scanning electron microscopy (FESEM), and X-ray photoelectron spectroscopy (XPS) measurements were carried out to characterize the as-grown MoS₂ dendrites and further confirm these observations.

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大面积二硫化钼（MoS2）枝晶的化学气相沉积生长

近十年来，二硫化钼（MoS2）因其在电子设备、光电子学和燃料电池中的潜在应用而成为一种流行的过渡金属二卤化物（TMDC）。具体而言，树枝状 MoS2 已被证明能有效催化各种氢进化反应。我们报告了利用复杂的常压化学气相沉积（APCVD）系统在二氧化硅/硅晶片上生长树枝状 MoS2 片的情况。高分辨率光学显微镜揭示了一种由不同星形树枝状物组成的形态，此外还有大的 MoS2 域，它们合并在一起形成了一层连续的薄膜。我们的观察结果表明，树枝状突起源于单层 MoS2 岛的成核中心，其分支优先沿着该岛的晶界发展。拉曼光谱、原子力显微镜（AFM）、场发射扫描电子显微镜（FESEM）和 X 射线光电子能谱（XPS）测量对生长后的 MoS2 树枝状物进行了表征，并进一步证实了这些观察结果。

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来源期刊

Nano-Structures & Nano-Objects Physics and Astronomy-Condensed Matter Physics

CiteScore

9.20

自引率

0.00%

发文量

审稿时长

22 days

期刊介绍： Nano-Structures & Nano-Objects is a new journal devoted to all aspects of the synthesis and the properties of this new flourishing domain. The journal is devoted to novel architectures at the nano-level with an emphasis on new synthesis and characterization methods. The journal is focused on the objects rather than on their applications. However, the research for new applications of original nano-structures & nano-objects in various fields such as nano-electronics, energy conversion, catalysis, drug delivery and nano-medicine is also welcome. The scope of Nano-Structures & Nano-Objects involves: -Metal and alloy nanoparticles with complex nanostructures such as shape control, core-shell and dumbells -Oxide nanoparticles and nanostructures, with complex oxide/metal, oxide/surface and oxide /organic interfaces -Inorganic semi-conducting nanoparticles (quantum dots) with an emphasis on new phases, structures, shapes and complexity -Nanostructures involving molecular inorganic species such as nanoparticles of coordination compounds, molecular magnets, spin transition nanoparticles etc. or organic nano-objects, in particular for molecular electronics -Nanostructured materials such as nano-MOFs and nano-zeolites -Hetero-junctions between molecules and nano-objects, between different nano-objects & nanostructures or between nano-objects & nanostructures and surfaces -Methods of characterization specific of the nano size or adapted for the nano size such as X-ray and neutron scattering, light scattering, NMR, Raman, Plasmonics, near field microscopies, various TEM and SEM techniques, magnetic studies, etc .