Design and realization of novel material composites for miniaturized devices
Mechatronics Engineering Program, Sabanci University,
Orhanli, Tuzla 34956 Istanbul
Gullu Kiziltas received the B.Sc. and M.Sc. degrees in mechanical engineering from the Middle East Technical University, Ankara, Turkey, in 1995 and 1998, respectively, and the Ph.D. degree in mechanical engineering from the University of Michigan, Ann Arbor, in 2003. During her doctoral work, she focused on extending topology optimization design methods to high-frequency electromagnetic applications. She was a Postdoctoral Researcher with both the Electro- Science Laboratory, Ohio State University, Columbus, and the University of Michigan, from May 2003 to September 2005. She also coordinated with the Ceramic Research Group, Material Science and Engineering Department, University of Michigan, on the advanced fabrication of dielectric composites. She is currently an Associate Professor with the Mechatronics Program, Sabanci University, Istanbul, Turkey. Her current research efforts center on the design, analysis, and fabrication of complex engineering systems, such as miniaturized electromagnetic, electromechanical, and biomedical devices and multidisciplinary design optimization techniques. She has published a book chapter and numerous journal and conference articles. She is the recipient of the Distinguished Leadership Award, College of Engineering, University of Michigan in 2001 and the Turkish Academy of Sciences (TUBA) Young Scientist Award (GEBIP) in 2008. She is a member of the IEEE, ASME and ACerS (The American Ceramic Society).
Abstract: As technology matures and the quest for miniaturized and multifunctional devices increases in automotive, RF-MEMS and biomedical applications; the capability to design the material itself becomes a bottleneck to overcome current performance limitations. Regarding RF (Radio-Frequency) applications, recent studies on artificial materials demonstrate that substantial improvements in electromagnetic response can be attained by combining different materials subject to desired metrics. However, the perfect material combination is unique and extremely difficult to determine without automated synthesis schemes. This talk will present versatile approaches to design and fabricate the microstructure and topology of electromagnetic materials with desired performance specifications. The proposed design framework is based on robust material modeling and generalized synthesis tools relying on topology optimization. The former is based on SIMP or derived using homogenization theory and asymptotic expansion applied to Maxwell equations, which are solved numerically using Finite Element Analysis tools. The topology optimization problem is applied towards designing miniaturized antennas with enhanced bandwidth performance and the topology of electromagnetic microstructure with desired dielectric and magnetic tensors using off-the-shelf materials such as LTCC (Low Temperature Co-firing Ceramics) and polymer composites. Fabrication techniques capable of producing the exact replica of the desired multi-material ceramic and polymer distribution based on novel Dry Powder Deposition technique and tape casting will also be summarized. The talk will emphasize at the end how the design approach can easily be extended to the design of active tissue scaffolds and nano-devices.