Michael J. Bedzyk Professor of Materials Science and Engineering and (by courtesy) Physics and Astronomy

Co-Director of Synchrotron Research Center

Chair, Materials Science and Engineering

Research Interests

The Bedzyk Research Group develops and uses synchrotron X-ray scattering and spectroscopy to understand the arrangement of atoms and molecules at interfaces. This includes in situ studies of the condensation of polynucleotides and ions at liquid/solid interfaces, self-assembly of organic molecules at single crystal surfaces, catalytic reactions at gas/solid interfaces, and epitaxial growth of metal, metal-oxide and semiconductor films and supported nanostructures.

Selected Publications

"Chemically-Resolved Interface Structure of Epitaxial Graphene on SiC(0001)", J. D. Emery, B. Detlefs, H. J. Karmel, L. O. Nyakiti, D. K. Gaskill, M. C. Hersam, J. Zegenhagen, M. J. Bedzyk,Phys. Rev. Lett. 111, 21550 (2013). DOI: 10.1103/PhysRevLett.111.215501

"Counterion Distribution Surrounding Spherical Nucleic Acid-Au Conjugates (SNA-AuNPs) Probed by Small-Angle X-ray Scattering (SAXS)", S. Kewalramani, J. W. Zwanikken, R. J. Macfarlane, C. Y. Leung, M. Olvera de la Cruz, C. A. Mirkin and M. J. Bedzyk, ACS Nano 7, 11301-11309 (2013). DOI. 10.1021/nn405109z.

"Crystalline polymorphism induced by charge regulation in ionic membranes", C.-Y. Leung, L. C. Palmer, S. Kewalramani, B. F. Qiao, S. I. Stupp, M. Olvera de la Cruz, and M. J. Bedzyk, Proc Natl Aca Sci 110, 16309-16314 (2013).

"Catalysts Transform While Molecules React: An Atomic-Scale View", Z. Feng, J. Lu, H. Feng, P. C. Stair, J. W. Elam, M. J. Bedzyk, J. Phys. Chem. Lett. 4, 285-291 (2013). DOI: 10.1021/jz301859k

"Fused Thiophene Semiconductors: Crystal Structure-Film Microstructure-Transistor Performance Correlations", J. Youn, S. Kewalramani, J. D. Emery, Y. Shi, S. Zhang, H.-C. Chang, Y.-J. Liang, C.-M. Yeh, C.-Y. Feng, H. Huang, C. Stern, L.-H. Chen, M.-C. Chen, M. J. Bedzyk, A. Facchetti, and T. J. Marks, Adv. Func. Mat. (online) (2013).

"Molecular Crystallization Controlled by pH Regulates Mesoscopic Membrane Morphology", Cheuk-Yui Leung, Liam C. Palmer, Bao Fu Qiao, Sumit Kewalramani, Rastko Sknepnek, Christina J. Newcomb, Megan A. Greenfield, Graziano Vernizzi, Samuel I. Stupp, Michael J. Bedzyk and Monica Olvera de la Cruz, ACSNano 6, 10901-10909 (2012).

"Fundamental performance limits of carbon nanotube thin-film transistors achieved using hybrid molecular dielectrics", Vinod K. Sangwan, Rocio Ponce Ortiz, Justice M. P. Alaboson, Jonathan D. Emery, Michael J. Bedzyk, Lincoln J. Lauhon, Tobin J. Marks, and Mark C. Hersam, ACSNano, 6, 7480-7488 (2012).

"In-Situ Probe of Gate Dielectric-Semiconductor Interfacial Order in Organic Transistors: Origin and Control of Large Performance Sensitivities", Stephanie R. Walter, Jangdae Youn, Jonathan D. Emery, Sumit Kewalramani, Jonathan W. Hennek, Michael J. Bedzyk, Antonio Facchetti, Tobin J. Marks, Franz M. Geiger, J. Am. Chem. Soc. 134, 11726-11733 (2012).

"Seeding Atomic Layer Deposition of High-κ Dielectrics on Epitaxial Graphene with Organic Self-Assembled Monolayers", J. M. P. Alaboson, Q. H. Wang, J. D. Emery, A. L. Lipson, M. J. Bedzyk, J. W. Elam, M. J. Pellin, M. C. Hersam, ACS Nano 5, 5223-5232 (2011).

"Solution-Deposited Organic-Inorganic Hybrid Multilayer Gate Dielectrics. Design, Synthesis, Microstructures, and Electrical Properties, with Thin-Film Transistors", Young-geun Ha, Jonathan D. Emery, Michael J. Bedzyk, Hakan Usta, Antonio Facchetti and Tobin J. Marks, J Am Chem Soc 133, 10239 (2011).

"Atomic Imaging of Oxide-Supported Metallic Nanocrystals", Z. Feng, A. Kazimirov, M. J. Bedzyk, ACS Nano 5, 9755-9760 (2011).

"Direct Atomic-Scale Observation of Redox-Induced Cation Dynamics in an Oxide-Supported Monolayer Catalyst: WOX/α-Fe2O3(0001)", Z. Feng, C.-Y. Kim, J. W. Elam, Q. Ma, Z. Zhang, M. J. Bedzyk, J. Am. Chem. Soc. 131, 18200-18201 (2009).

"A Ferroelectric Oxide Made Directly on Silicon", M.P. Warusawithana, C. Cen, C.R. Sleasman, J.C. Woicik, Y. Li, L.F. Kourkoutis, J.A. Klug, H. Li, P. Ryan, L.-P. Wang, M. Bedzyk, D.A. Muller, L.-Q. Chen, J. Levy, D.G. Schlom, Science 324, 367-370 (2009).

"Diffuse-Double Layer at a Membrane-Aqueous Interface Measured With X-Ray Standing Waves", M. J. Bedzyk, G. M. Bommarito, M. Caffrey, T. L. Penner, Science 248, 52-56 (1990).