Sol Torrel, Rutgers University
Elucidation of Friction Behavior in 2D MoS2 with Raman Spectroscopy
Written by Natalie Briggs
As layered materials such as molybdenum disulfide (MoS2) see continued development for nanoscale electronics, detailed investigation of friction in few-layer systems and its role in device technologies is needed. To investigate friction few-layer MoS2 systems, researchers at Rutgers University have employed Raman spectroscopy and atomic force microscopy. Through joint-use of these techniques, it is found that friction can vary widely within individual layered crystals of MoS2. Additionally, Raman spectroscopy of few-layer MoS2 synthesized through vaporization of molybdenum trioxide and sulfur powders shows that friction on the surface of this two-dimensional material is dominated by phonon behavior. As a result of these studies, an algorithm has been developed that can predict the friction in layered MoS2 simply based on experimentally obtained Raman spectra.