Guest Seminar - Nanotribological Behavior of Two-Dimensional Materials
Friction, as a widely encountered phenomenon, holds significant implications for resource utilization. This study conducts a comprehensive investigation into the frictional properties of two-dimensional (2D) layered materials and their interactions with small molecules in diverse environments, aiming to advance our comprehension of friction reduction and the underlying causes. By utilizing atomic force microscopy (AFM), we investigate the dynamic behavior of small molecules during sliding friction processes in both air and liquid settings, shedding light on their impact on the frictional characteristics of 2D materials. Notably, our findings unveil the influence of adsorbed small molecules on friction hysteresis in single-layer 2D materials, thereby affecting its capacity to recover from deformation. Moreover, we delve into the influence of surface-adsorbed small molecules on the nanoscale frictional properties of four transition metal dichalcogenide materials, effectively highlighting alterations in lattice patterns and friction forces. The insights presented in this talk significantly contribute to the fundamental understanding of friction and pave the way for the development of advanced materials and lubrication technologies.
Mingdong Dong is a Professor at Aarhus University in Denmark, where he holds a position in the Interdisciplinary Nanoscience Center. He is an applied physicist with expertise in advanced surface-sensitive scanning probe microscopy (SPM). Professor Dong has made significant contributions to the field by developing several quantitative SPM-based techniques that are used to investigate electronic, mechanical, thermal, chemical, and magnetic properties in biological systems and nanomaterials. These techniques have helped researchers gain a better understanding of the structure-function relationship. His research has resulted in top international peer-reviewed journals, including Nature, Nature Nanotechnology, Nature Chemistry, Nature Communications, PNAS, Angewandte Chemie, Nano Letters, JACS, ACS NANO, and Advanced Materials. His publications have been cited over 18,000 times with h-idex70. Professor Dong is an active member of various professional organizations, including the Royal Microscopical Society, the American Chemical Society, the Materials Research Society, and the Biophysical Society. He is also a Fellow of the Royal Society of Chemistry.