Scanning Probe Spectroscopy of WS₂/Graphene Van Der Waals Heterostructures.

ABSTRACT: In this paper, we present a study of tungsten disulfide (WS₂) two-dimensional (2D) crystals, grown on epitaxial Graphene. In particular, we have employed scanning electron microscopy (SEM) and µRaman spectroscopy combined with multifunctional scanning probe microscopy (SPM), operating in peak force-quantitative nano mechanical (PF-QNM), ultrasonic force microscopy (UFM) and electrostatic force microscopy (EFM) modes. This comparative approach provides a wealth of useful complementary information and allows one to cross-analyze on the nanoscale the morphological, mechanical, and electrostatic properties of the 2D heterostructures analyzed. Herein, we show that PF-QNM can accurately map surface properties, such as morphology and adhesion, and that UFM is exceptionally sensitive to

SUBMITTER: Dinelli F 

PROVIDER: S-EPMC7762982 | biostudies-literature | 2020 Dec

REPOSITORIES: biostudies-literature