Sticky and Slippery Materials
The overall research theme in the Pesika group is the fabrication of “smart” surfaces and colloids. In the first part of my talk, I will present some of our preliminary work on the use of highly monodispersed carbon microspheres as micro-bearings to lubricate surfaces. The performance of these particles as an aqueous lubricant to reduce friction as well as minimize surface wear will be shown. Potential applications for these particles in different formulations include an alternative to oil-based lubricants, and a replacement for synovial fluid. In the second part of my talk, I will present our work on the design and fabrication of dry polymeric adhesives mimicking gecko adhesion. The mechanisms by which geckos are able to adhere strongly yet detach easily and quickly will be shown. In addition, I will demonstrate how mathematical models we have developed will be used to gear the fabrication of the next generation of dry adhesives. Since the latter rely on van der Waals forces for adhesion, they can stick to almost any material in any environment or media, including in vacuum or under liquids.
Dr. Pesika attended Carnegie Mellon University where he obtained his Bachelors Degree (1999) in Chemical Engineering and French. He then obtained his Ph.D. (2005) in Chemical and Biomolecular Engineering from Johns Hopkins University where he developed a novel microfabrication technique involving microcontact printing and electrochemistry. Following his Ph.D., Dr. Pesika joined the University of California in Santa Barbara as a postdoctoral fellow.
To date Dr. Pesika has authored over 30 peer-reviewed journals. His honors include a Graduate Student Fellowship from NASA, a Postdoctoral Fellowship from the Intelligence Community to study the nanoscale contact mechanics of geckos. He currently holds the Robert and Gayle Longmire Early career professorship in chemical engineering.
January 28, 2013
The City College of New York
Convent Avenue & 140th Street
Steinman 160 - Lecture Hall