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Bioadhesion (or biofouling) involves adhesive interactions between biological agents or biologically derived substances and man-made surfaces. This phenomenon can be beneficial in certain instances (i.e., drug delivery, wound healing, tissue engineering) yet harmful in others (i.e., fouling of bioreactors, heat exchangers, filters, pipelines, etc.). Bioadhesion is also detrimental to the function of naval vessels because it gives rise to frictional resistance due to surface roughening; this leads, in turn, to increased fuel consumption and higher frequency of dry-docking, both of which add extra operating cost. In addition, serious ecological issues are associated with more environments being contaminated constantly with “non-native” organisms adhered to ship’s hulls during their travel. In the presentation we will discuss how the substrate topography affects the settlement of marine organisms. Specifically, we will discuss experimental approaches that discuss the role of topography (including feature size and shape) on adhesion of “baby barnacles” called cyprids. In addition, we will present the results from a simple computational model that provides insight into the adsorption of model spherical particles adsorbing onto sinusoidally-corrugated substrates with adjustable amplitude and wavelength. We will also outline possible avenues to generalize this approach towards substrates with adjustable topography shape.
Jan Genzer received his "Diploma-engineer" degree (Dipl.-Ing.) in Chemical & Materials Engineering from the University of Chemistry & Technology in Prague, Czech Republic, in 1989. In 1991 he moved to the U.S. to pursue graduate studies at the University of Pennsylvania under the direction of Professor Russ Composto, receiving the Ph.D. degree in Materials Science & Engineering in 1996. After 2 post-doctoral stints with Professor Ed Kramer first at Cornell University (1996-1997) and later at University of California at Santa Barbara (1997-1998), Genzer joined the faculty of chemical engineering at NC State University as an Assistant Professor in fall 1998. He is currently the S. Frank & Doris Culberson Distinguished Professor and Associate Department Head in the Department of Chemical & Biomolecular Engineering at NC State University. His honors include: Camille Dreyfus Teacher-Scholar Award, NSF CAREER award, John H. Dillon Award of the American Physical Society, NSF Award for Special Creativity, NC State's Outstanding Teacher Award, NC State’s Alumni Outstanding Research Award, NC State’s Alcoa Foundation Distinguished Engineering Research Award, NC State’s Alumni Distinguished Undergraduate Professor award, NC ACS Outstanding Lecturer Award, and others. He is a Fellow of the American Physical Society. Genzer published >240 peer-reviewed journal articles and delivered >200 invited lectures. His group at NC State University is actively involved in research related to the behavior of polymers at surfaces, interfaces and in confined geometries, with particular emphasis on self-assembly and forced assembly, and combinatorial methods. Genzer is the co-director of the Research Triangle Materials Research Science & Engineering Center (RT-MRSEC).