Hopkins Extreme Materials Institute (HEMI) seminar: Eduard Arzt

Topic: Bioinspired micropatterned surfaces with switchable functionality Speaker: Eduard Arzt, INM–Leibniz Institute for New Materials and Department of Materials Science, Saarland University, Saarbrücken, Germany

Abstract: New surfaces and coatings can drastically improve the properties and applicability of materials. At INM, we develop and investigate new micro-and nanopatterned surfaces for diverse functionalities: low friction, adhesion, corrosion protection, anti-reflection, electric storage and combinations of these. Such surfaces either exhibit new chemistries or new topographies, sometimes on different hierarchical levels. This talk will first summarize some of our developments by bridging the scientific principles with existing or emerging applications. It will then focus on micro patterning of surfaces for novel adhesive functionalities: the exploitation of judiciously designed surface protrusions, "fibrils" and other features at the micron scale—as insects, spiders and geckos —to create fundamentally new degrees of freedom for mechanical and other surface functions. Our extensive research in this area has recently led to the following results: i)design of active surfaces that exploit a transition from an adhesive to nonadhesive state, ii) first implementation in active pick-and-place systems, and iii) our recent developments in producing functional surfaces for interaction with soft materials, such as human skin. Our current emphasis is on controlling adhesion and friction, which is of great potential interest in microfabrication, construction industry, and sports equipment. Such developments require modeling and simulation activities which help understand the micro mechanics of patterned adhesion and identify optimum parameters in a vast parameter space.

Bio: Eduard Arzt is the scientific director of INM–Leibniz Institute for New Materials, Saarbrücken, Germany, and a professor at Saarland University since 2007. He received a PhD in physics from the University of Vienna in 1980 and did a postdoc at University of Cambridge, UK. He was the director of the Max Planck Institute for Metals Research (now Max Planck Institute for Intelligent Systems) and a professor of metals physics at the University of Stuttgart from 1990 to 2007. He has been a visiting professor at Stanford University; MIT; University of California, Santa Barbara, and UC San Diego; Technion, Haifa, Israel; and the Institute for Metals Research, Chinese Academy of Sciences. He has received a Max Planck Research Award, Acta Materialia Outstanding Paper Award, Leibniz Prize (highest German research award), and an Advanced Grant by the European Research Council in 2013. He is a member of the Austrian Academy of Sciences and the German Academy of Sciences Leopoldina. A highly cited materials scientist, Arzt is the editor of Progress in Materials Science, the leading review journal in materials.

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