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Joint Special Seminar: Bioinspired Functional Surfaces

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May 4, 2016 -
3:00pm to 4:15pm
MERL 203

Mechanical Engineering and Materials Science and Engineering Joint Special Seminar

Bioinspired Functional Surfaces

Professor Eduard Arzt
Scientific Director and Chairman (CEO), INM - Leibniz Institute for New Materials;
Professor for New Materials, Saarland University, Saarbruecken, Germany

New surfaces and coatings can drastically improve the properties and applicability of materials. At INM, we develop and investigate new dynamic surfaces for diverse functionalities: low friction, adhesion, corrosion protection, anti-reflection, electric storage and the combinations of these. Such surfaces either exhibit new chemistries or new fibrillar topographies, sometimes on different hierarchical levels. I will first give an overview of some of our recent developments in these areas. Then I will highlight our bio-inspired exploitation of the "gecko effect": after research over more than a decade, also on living animals, we are now in a position to artificially produce and optimize such surface protrusions to create also switchable functionalities. Recently, we investigated such features numerically by considering the micromechanics of detachment of single elastic fibrils from an elastic half-space; the simulations now guide the fabrication of GecomerĀ® surfaces even in roll-to-roll processes. Further topics include the adhesion of fibrillar structures to rough surfaces and to soft materials, such as skin and tissue.

R.G. Balijepalli, M.R. Begley, N.A. Fleck, R.M. McMeeking, E. Arzt, Numerical simulation of the edge stress singularity and the adhesion strength for compliant mushroom fibrils adhered to rigid substrates, Intern. J. Sol. Struct. (2016)

V. Barreau, R. Hensel, N.K. Guimard, A. Ghatak, R.M. McMeeking, E. Arzt, Fibrillar elastomeric micropatterns create tunable adhesion even to rough surfaces, Adv. Funct. Mats. (2016)

M. Frensemeier, J.S. Kaiser, C.P. Frick, A.S. Schneider, E. Arzt, R.S. Fertig, E. Kroner, Temperature-induced switchable adhesion using nickel-titanium PDMS hybrid surfaces, Adv. Funct. Mats. 25, 3013 (2015)

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Jointly sponsored by the Departments of Mechanical Engineering and Materials Science and Engineering
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