BEDZYK, MICHAEL - Northwestern University - Department of Materials Science and Engineering

个人简介

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

研究领域

Bedzyk's research group develops 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, they 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. Bedzyk employs 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.

近期论文

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M. K. Tiwari, G. Das, M. J. Bedzyk,“X-ray Standing Wave Analysis of Nanostructures using Partially Coherent Radiation”, Appl. Phys Lett. 107, 103104 (2015). http://dx.doi.org/10.1063/1.4930228 X. Yu, J. Smith, N. Zhou, L. Zeng, P. Guo,Y. Xia, A. Alverez, S. Aghion, H. Lin, J. Yu, R. P. H. Chang, M. J. Bedzyk, R. Ferragut, T. J. Marks, Antonio Facchetti,"Spray-Combustion Synthesis: Efficient Solution Route to High-Performance Oxide Transistors",Proc. Nat. Aca. Sci. 112, 3217-3222 (2015). J. D. Emery, V. H. Wheeler, J.E. Johns, M. E. McBriarty, B. Detlefs, M. C. Hersam, D. K. Gaskill, M. J. Bedzyk, “Structural consequences of hydrogen intercalation of epitaxial graphene on SiC(0001)”, Appl. Phys. Lett. 105, 161602 (2014). http://dx.doi.org/10.1063/1.4899142 J. D. Emery, B. Detlefs, H. J. Karmel, L. O. Nyakiti, D. K. Gaskill, M. C. Hersam, J. Zegenhagen, M. J. Bedzyk, “Chemically-Resolved Interface Structure of Epitaxial Graphene on SiC(0001)”, Phys. Rev. Lett. 111, 21550 (2013). DOI: 10.1103/PhysRevLett.111.215501 S. Kewalramani, J. W. Zwanikken, R. J. Macfarlane, C. Y. Leung, M. Olvera de la Cruz, C. A. Mirkin and M. J. Bedzyk, “Counterion Distribution Surrounding Spherical Nucleic Acid-Au Conjugates (SNA-AuNPs) Probed by Small-Angle X-ray Scattering (SAXS)”, ACS Nano 7, 11301-11309 (2013). DOI. 10.1021/nn405109z. 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 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