Faculty DirectoryMichael Bedzyk
Professor of Materials Science and Engineering and (by courtesy) Physics and Astronomy
Co-Director, Northwestern Synchroton Research Center
Chair of Materials Science and Engineering
Contact2220 Campus Drive
Cook Hall 2036
Evanston, IL 60208
Email Michael Bedzyk
Northwestern Synchroton Research Center
Ph.D. Physics, State University of New York, Albany, NY
M.S. Physics, State University of New York, Albany, NY
B.S. Physics and Mathematics, State University of New York, Brockport, NY
We develop novel X-ray probes for atomic-scale characterization of surfaces, interfaces, ultra-thin-films and nanostructures. In addition to using an in-house X-ray lab, we make extensive use of synchrotron X-ray facilities, where there is greatly enhanced chemical and structural sensitivity for studying systems as dilute as one-hundredth of an atomic monolayer.
We employ various conventional X-ray scattering and spectroscopy techniques, and have developed a number of novel methods for generating X-ray standing waves with differing characteristic length scales. These periodic X-ray probes are used to pinpoint the lattice location of adsorbate atoms on crystalline surfaces, to measure strain within epitaxially grown semiconductor and ferroelectric thin films, to locate heavy atoms within ordered ultrathin organic films, and to study polyion adsorption at charged liquid/solid interfaces.
- Fellow, American Association for the Advancement of Science, 2012
- Fellow, American Physical Society, 1998
- Bertram Eugene Warren Diffraction Physics Award, American Crystallographic Association, 1994
C.-Y. Leung, L. C. Palmer, S. Kewalramani, B. F. Qiao, S. I. Stupp, M. Olvera de la Cruz, and M. J. Bedzyk, “Crystalline polymorphism induced by charge regulation in ionic membranes”, Proc Natl Aca Sci 110, 16309-16314 (2013).
Z. Feng, J. Lu, H. Feng, P. C. Stair, J. W. Elam, M. J. Bedzyk, “Catalysts Transform While Molecules React: An Atomic-Scale View”, J. Phys. Chem. Lett. 4, 285-291 (2013). DOI: 10.1021/jz301859k
C.-Y. Leung, L. C. Palmer, B. F Qiao, S. Kewalramani, R. Sknepnek, C. J. Newcomb, M. A. Greenfield, G. Vernizzi,S. I. Stupp, M. J. Bedzyk and M. Olvera de la Cruz, “Molecular Crystallization Controlled by pH Regulates Mesoscopic Membrane Morphology”, ACS Nano 6, 10901-10909 (2012). DOI: 10.1021/nn304321w
A. L. Lipson, S. Chattopadhyay, H. J. Karmel, T. T. Fister, J. D. Emery, V. P. Dravid, M. M. Thackeray, P. A. Fenter, M. J. Bedzyk and M. C. Hersam, “Enhanced Lithiation of Doped 6H Silicon Carbide (0001) via High Temperature Vacuum Growth of Epitaxial Graphene”, J. Phys. Chem. C 116, 20949-20957 (2012). DOI: 10.1021/jp307220y
Z. Feng, A. Kazimirov and M. J. Bedzyk, “Atomic Imaging of Oxide-Supported Metallic Nanocrystals”, ACS Nano 5, 9755-9760 (2011). DOI: 10.1021/nn203273e
J. D. Emery, Q. H. Wang, M. Zarrouati, P. Fenter, M. C. Hersam, and M. J. Bedzyk, “Structural Analysis of PTCDA Monolayers on Epitaxial Graphene with Ultra-High Vacuum Scanning Tunneling Microscopy and High-Resolution X-Ray Reflectivity”, Surf. Sci. 605, 1685-1693 (2011). DOI: 10.1016/J.Susc.2010.11.008
S.T. Christensen, J.W. Elam, F.A. Rabuffetti, Q. Ma, S.J. Weigand, B. Lee, S. Seifert, P.C. Stair, K.R. Poeppelmeier, M.C. Hersam, M.J. Bedzyk, “Controlled Growth of Platinum Nanoparticles on Strontium Titanate Nanocubes By Atomic Layer Deposition”, Small 5, 750-757 (2009). DOI: 10.1002/smll.200801920
Z. Zhang, P. Fenter, L. Cheng, N.C. Sturchio, M.J. Bedzyk, M.L. Machesky, L.M. Anovitz, D.J. Wesolowski, “Zn2+ and Sr2+ Adsorption at the TiO2 (110)-Electrolyte Interface: Influence of Ionic Strength, Coverage, and Anions”, J. Coll. Interf. Sci. 295, 50-64 (2006).
H. Cheng, K. Zhang, J.A. Libera, M. Olvera De La Cruz and M.J. Bedzyk , “Polynucleotide Adsorption to Negatively Charged Surfaces in Divalent Salt Solutions”, Biophys. J. 90, 1164-1174 (2006).
X. Liu, Y. Zhang, D. K. Goswami, J.S. Okasinski, K. Salaita, P. Sun, M.J. Bedzyk, C.A. Mirkin, “The Controlled Evolution of a Polymer Single Crystal”, Science 307, 1763-1766 (2005).