Surface Energy Engineering for Tunable Wettability through Controlled Synthesis of MoS2

Abstract

MoS2 is one of the important members of transition metal dichalogenides which is emerging as a potential 2D atomically thin layered material for low power electronic and opto-electronic applications. However, for MoS2 a critical fundamental question of significant importance is how the surface energy and hence the wettability is altered in nanoscale -- in particular, the role of crystal quality in low dimensions. Present work reports the synthesis of large area MoS2 films on insulating substrates with different surface morphology via vapor phase deposition by varying the growth temperatures. The crystallinity of the samples is examined by transmission electron microscopy and Raman spectroscopy. From contact angle measurements, it is possible to correlate the wettability with crystallinity at nanoscale. The specific surface energy for few layers thick MoS2 is estimated to be around 46.5 mJ/m2. Our results shed light on the MoS2-water interaction which is significant for developing important devices based on MoS2 coated surfaces for micro-fluidic applications.

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Cited by in corpus (14)

• Vapor-Liquid-Solid Growth of Monolayer MoS2 Nanoribbons
• On the nature of wettability of van der Waals heterostructures
• Graphene and MoS2 interacting with water: a comparison by ab initio calculations
• Switchable friction enabled by nanoscale self-assembly on graphene
• Hydrophobic Ice Confined between Graphene and MoS2
• Spin-Polarized Tunneling through Chemical Vapor Deposited Multilayer Molybdenum Disulfide
• Toward Low-Temperature Solid-Source Synthesis of Monolayer MoS2
• Low-defectiveness exfoliation of MoS2 nanoparticles and their embedment in hybrid light-emitting polymer nanofibers
• Wetting of nanopores probed with pressure
• High-yield exfoliation of MoS2 nanosheets by a novel spray technique and the importance of soaking and surfactants
• Understanding the wetting of transition metal dichalcogenides from an ab initio perspective
• Optical Imaging of Chemically and Geometrically Controlled Interfacial Diffusion and Redox in 2D van der Waals Space
• Enhanced chemical vapour deposition of monolayer MoS2 films via a clean promoter
• Tunable topological phase in 2D ScV${}_6$Sn${}_6$ kagome material