Surface Energy Engineering for Tunable Wettability through Controlled Synthesis of MoS2
Citations Over TimeTop 1% of 2014 papers
Abstract
MoS2 is an important member of the transition metal dichalcogenides that is emerging as a potential 2D atomically thin layered material for low power electronic and optoelectronic applications. However, for MoS2 a critical fundamental question of significant importance is how the surface energy and hence the wettability is altered at the nanoscale in particular, the role of crystallinity and orientation. This work reports on the synthesis of large area MoS2 thin films on insulating substrates (SiO2/Si and Al2O3) with different surface morphology via vapor phase deposition by varying the growth temperatures. The samples were examined using transmission electron microscopy and Raman spectroscopy. From contact angle measurements, it is possible to correlate the wettability with crystallinity at the nanoscale. The specific surface energy for few layers MoS2 is estimated to be about 46.5 mJ/m2. Moreover a layer thickness-dependent wettability study suggests that the lower the thickness is, the higher the contact angle will be. Our results shed light on the MoS2–water interaction that is important for the development of devices based on MoS2 coated surfaces for microfluidic applications.
Related Papers
- → Role of Plasma Surface Treatments on Wetting and Adhesion(2010)147 cited
- → New insights on contact angle/roughness dependence on high surface energy materials(2011)126 cited
- → The wettability of low-energy liquid surfaces(1966)85 cited
- → The influence of metallic surface wettability on bacterial adhesion(1993)82 cited
- → Detailed Characterization of the Effect of Application of Commercially Available Surface Treatment Agents on Textile Wetting Behavior(2019)4 cited