세미나

Tribology is defined as the science and technology of interacting surfaces in relative
motion, which can cover friction, wear and lubrication. Tribology has become an
interdisciplinary area which includes materials, chemistry, physics, mechanics and even
biology. The phenomena of tribology should be inevitably understood and controlled in any
situation where two or more surfaces are in relative motion at contact. Especially in
mechanical systems, significant loss of energy and mechanical failure can result from friction
and wear, and thus, suitable lubrication is of importance in mechanical systems to increase the
lifetime of mechanical systems as well as to reduce the waste of energy. Among tribological
technologies, solid-state tribology is being extensively explored in new emerging fields of
applications where liquid lubrication is not possible. Two dimensional (2D) nanomaterials
have been extensively studied as emerging solid-state tribology materials owing to their
superior mechanical and tribological performances with layered structures. Starting from
nanoscale tribology, 2D nanomaterials have been explored to demonstrate high-performance
tribological performances at macroscale. For example, graphene, 2D carbon hexagonal
structure, has extremely high elastic modulus as well as super-low interlayer shear strength
and the recent research revealed that graphene can be utilized to realize superlubricity at
nanoscale whose coefficient of friction (COF) is below 0.01. In this seminar, 2D
nanomaterials as solid-state tribology materials will be introduced and discussed, specifically
focusing on some recent results for tribological characteristics of graphene and graphenerelated 2D nanomaterials both at nanoscale and macroscale.