bat365正版官方网站“博约学术论坛”系列报告
第87期     (2016年第14期)

Title：Lubricating Properties of Graphene
报告人：Prof. Philip Egberts (University of Calgary)
时   间：10月17日（周一）上午10：00
地   点：中心教学楼610
ABSTRACT
Single asperity friction experiments on graphene, as well as other atomically thin films, have shown that single layers of atoms can dramatically reduce friction when compared to the substrate materials.  In particular, the low adhesion and the high tensile modulus typically measured on graphene makes it an ideal solid lubricant for a variety of applications, including nano/microelectromechanical (N/MEMS) system, magnetic storage, and other industrial applications. However, a number of factors have been shown to significantly influence the ability of graphene to reduce friction, including the number of graphene layers used, the adhesive properties of the underlying substrate, and chemical functionalization of the surface.  The ability of graphene to lubricate a number of substrates will be examined.  Specifically, exfoliated graphene on silicon wafers and chemical vapour deposition (CVD) grown graphene on both polycrystalline copper foils and single crystals of platinum will be addressed. Additional factors, such as environmental exposure, surface topographical structure, and surface energies will be discussed in terms of their influence on the ability of graphene to lubricate a surface.  Atomic scale mechanisms of lubrication will be discussed by combining experimental atomic force microscopy results, atomistic simulations, and analytical friction theories.
Curriculum Vitae
Philip Egberts obtained his Ph.D. from the McGill University in Montreal, Canada specializing in Experimental Condensed Matter Physics in 2011, while completing most of his research at the INM-Leibniz Institute for New Materials in Saarbrücken, Germany. Following his PhD studies, he joined the Carpick Research Group in the Department of Mechanical Engineering and Applied Mechanics at the University of Pennsylvania as a Natural Sciences and Engineering Research Council (NSERC) of Canada Postdoctoral Fellow. He has been an Assistant Professor at the University of Calgary in the Department of Mechanical and Manufacturing Engineering since September 2013, where his current focus is on the atomic and nanoscale investigation of adhesion, friction, and wear with the goal of making physical and predictive models of friction and wear.
More recently, he has been expanding topics to include engineering tribology, to improve surface engineering for automotive applications and examine lubrication mechanisms for drilling in the oil and gas industry. In July 2015, he was appointed as Associate Head Graduate Studies in Mechanical and Manufacturing Engineering.
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