Research in the design, synthesis and self-assembly of inorganic nanoscale materials is important for the development of miniaturized nanodevices and nanopatterns for various optical, electronics, photonics, sensing, separation, biological and medical applications. In this talk, I will discuss the following three major and complementary topics regarding the synthesis, properties and potential applications of various multifunctional nanostructured materials that my group has been working on. (1) The molecular integration of inorganic and organic groups in well-defined supramolecular systems as a route to various well-ordered nanostructured and nanoporous inorganic and inorganic-organic hybrid materials with novel catalytic, optical, and electronic properties will be described. Using self-assembly and sol-gel processing methods, we synthesized novel multifunctional nanomaterials with compositions that span a variety of inorganic and organic-inorganic hybrid materials with diverse properties and potential applications for targeted drug delivery, treatment of cancer and efficient cooperative catalysis. 2) The use of these nanoporous materials as templates or hosts for various other inorganic, organometallic, and organic species as well as nanoparticles and nanowires will be discussed. (3) We developed new synthetic methods to novel corrugated and nanoporous metal oxide and core-shell nanostructures. We also demonstrated the potential of these materials for biosensing and solar cells applications. The first results of nanocytotoxicity of some nanomaterials on various cancer cell lines will also be discussed. We believe that these novel nanomaterials will contribute to the development of nanotechnology.
Figure. Multifunctional Nanoscale Materials
Asefa, T. et al. Nature, 1999, 402, 867;
Asefa, T. et al., Langmuir, 2008, 24, 14306-14320; Asefa, T. et al. J. Mater. Chem., 2008, 18, 5604; Asefa, T. et al. Catal. Lett., 2008, 126, 142; Asefa, T. et al. J. Phys. Chem. C., 2008, 112, 9996; Asefa, T. et al. Nano Lett., 2008, 8, 1517; Asefa, T. et al. J. Molecular Catal. A, 2008, 288, 1 ; Asefa, T. et al. J. Am. Chem. Soc., 2008, 130, 218; Asefa, T. et al. J. Inorg. Biochem., 2008, 102, 1416; Angew. Chem., Int. Ed., 2007, 46, 2879; Asefa, T. et al., Langmuir, 2007, 23, 9455-9462.
Bio-sketch: Teddy Asefa was born in Ethiopia where he also completed his B.Sc. degree in Chemistry with distinction in 1992 from Addis Ababa University. He then came to the United States as a Fulbright Scholar in 1996 to do his graduate study. After a brief stay at the University of Delaware, he joined the Institute for Lasers, Photonics and Biophotonics (ILPB) at the State University of New York at Buffalo to complete his M.Sc. in Chemistry in 1998 and worked with Professor Paras N. Prasad. Teddy, then, went to Toronto, Canada to complete his Ph.D. at the University of Toronto in 2002 with Professor Geoffrey A. Ozin. While at Toronto he has co-invented new classes of nanocomposite materials called Periodic Mesoporous Organosilicas (PMOs) that are currently drawing wide range of interest world-wide. He was then an invited Miller Fellowship nominee by Professor Peidong Yang at the University of California at Berkeley and a post-doctoral fellow at McGill University with Professor R. Bruce Lennox. Teddy has then joined the faculty at Syracuse University in the summer of 2005 as an Assistant Professor of Chemistry where he is currently involved in the development of synthetic methods to a wide array of functional nanomaterials and the investigation of their potential applications in catalysis, targeted delivery of drugs as specific cells, nanocytotoxicity, solar-cells, and environmental remediation. He currently holds an NSF CAREER Award, is a recipient of multiple federal and local research grants and also serves as a panelist for several federal and international agencies.
Host: Adrian Mann, 732.445.8421