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"Self-assembly by curving, bending and folding"

Event Type
Department of Mechanical Science and Engineering
190 Engineering Sciences Building
Oct 3, 2017   3:00 - 4:00 pm  
Professor David Gracias, Department of Chemical and Biomolecular Engineering, Department of Materials Science and Engineering, Johns Hopkins University
Jason Lewis
Originating Calendar
MechSE Seminars


The interplay between bending rigidity and out-of-plane stresses, capillary forces or swelling in thin films can be manipulated so as to cause patterned 2D films to curve, bend and fold into 3D materials and devices. In this talk, the design, fabrication and characterization of such materials and devices will be described. The emphasis of our approach has been on ensuring mass-production of micro and nanodevices in a high-throughput manner with diverse materials such as 2D layered materials (e.g. graphene), device grade silicon and related materials and hydrogels. By leveraging the precision of planar lithography approaches such as photo, e-beam and nanoimprint methodologies, a range of functional patterns can be incorporated into these thin film self-assembling systems so as to provide value for optics, electronics and medicine. These include metamaterials, flexible devices, curved microfluidics, drug-delivery capsules, anatomically realistic models for tissue engineering, antennas, e-blocks, sensors, soft-robotic actuators and surgical tools.


About the Speaker

Prof. Gracias is a Professor at the Johns Hopkins University (JHU) in Baltimore. He did his undergraduate at the Indian Institute of Technology, received his PhD from the University of California at Berkeley in 1999 and did post-doctoral work at Harvard University, all in Chemistry or related fields.

His independent laboratory, since 2003, has pioneered the development of 3D, integrated micro and nanodevices using a variety of patterning, self-folding and self-assembly approaches.  Prof. Gracias has co-authored over 150 technical publications, is a co-inventor of 29 issued patents and has delivered over 100 invited talks at leading conferences, workshops and universities.

Prof. Gracias has received a number of national and international awards including the NIH Director’s New Innovator Award, Beckman Young Investigator Award, NSF Career Award, DuPont Young Professor Awards, Camille Dreyfus Teacher Scholar Award, Humboldt Fellowship for Experienced Researchers. He is a Fellow of the American Institute for Medical and Biological Engineering (AIMBE) and a senior member of the IEEE.


Host:  Professor Sameh Tawfick

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