2015/12/13 by Meenakshi Annamalai, K. Gopinadhan, Kalon Gopinadhan +10
Chemistry · Materials Science · Physics and Astronomy · #2D Materials and Applications #Chemical physics #Chemistry #Composite material #DLVO theory #Dipole #Energy (signal processing) #Geometry #Graphene research and applications #Hamaker constant #Materials science #Molecule #Nanotechnology #Organic chemistry #Physical chemistry #Physics #Quantum mechanics #Surface (topology) #Surface energy #Thermal properties of materials #Van der Waals radius #Van der Waals strain #Van der Waals surface #Wetting #cond-mat.mes-hall #van der Waals force
paper · pdf · doi:10.1039/c5nr06705g
published as Nanoscale 8, 5764-5770 (2016)
arxiv created 2015/12/13 · openalex publication_date 2016/01/01 · arxiv updated 2022/01/26 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The wetting behaviour of surfaces is believed to be affected by van der Waals (vdW) forces; however, there is no clear demonstration of this. With the isolation of two-dimensional vdW layered materials it is possible to test this hypothesis. In this paper, we report the wetting behaviour of vdW heterostructures which include chemical vapor deposition (CVD) grown graphene, molybdenum disulfide (MoS2) and tungsten disulfide (WS2) on few layers of hexagon boron nitride (h-BN) and SiO2/Si. Our study clearly shows that while this class of two-dimensional materials are not completely wetting transparent, there seems to be a significant amount of influence on their wetting properties by the underlying substrate due to dominant vdW forces. Contact angle measurements indicate that graphene and graphene-like layered transitional metal dichalcogenides invariably have intrinsically dispersive surfaces with a dominating London-vdW force-mediated wettability.