John C. HemmingerDean and Professor of Chemistry Director, Institute for Surface and Interface Science; 1987-93 Chair, Department of Chemistry; 1993-96 |
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Research Interests |
Surface Chemistry and Physics | |
| URL | surfsci.ps.uci.edu | |
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Academic Distinctions |
Outstanding Faculty Research Award of the UCI Alumni Association Alfred P. Sloan Fellow Fellow of the American Physical Society Fellow of the American Vacuum Society Fellow of the American Association for the Advancement of Science Alexander von Humboldt Foundation Senior Scientist Research Award 2003 Charles R. Bennett "Service Through Chemistry" Award, Orange County Section, ACS 2004 National ACS Award: "Arthur W. Adamson Award for Distinguished Service in the Advancement of Surface Chemistry" 2006 Medard W. Welch Award from the AVS |
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| Appointments | 1976-78, NSF Postdoctoral Fellow, University of California at Berkeley | |
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Research Abstract |
Surfaces and the chemistry that happens on them, control much of what happens in our modern high technology world. As such chemists are interested in reactions that occur on a wide variety of both simple and complex surfaces (e.g., surfaces of nanostructures, surfaces of electrodes, heterogeneous catalysts, solar energy systems, surfaces of semiconductors, as well as particles in the atmosphere). Recent advances in experimental probes of the atomic and molecular properties of solid surfaces now allow detailed studies of these and many other phenomena at the molecular level. We use modern surface science techniques to study the chemistry and structure of adsorbates on highly characterized surfaces of metals, semiconductors, and insulators. Underlying all of our research is an interest in understanding the fundamentals of the interactions of small molecules with surfaces. Such fundamental understanding will lead to the ability to design new materials that have the desired surface chemistry and to control the surface structure on the nanometer and atomic scale. We combine structural experiments (scanning tunneling microscopy(STM) and electron microscopies) with spectroscopic experiments (vibrational spectroscopy, photoelectron spectroscopy, and surface reactivity studies (mass spectrometry) to understand the mechanistic details of heterogeneous reactions. We develop new kinds of experiments that provide unique insight into surface reactions. One such new experiment is our usage of laser induced desorption of molecular adsorbates from surfaces coupled with Fourier transform mass spectrometry to detect and quantify the species desorbed from the surface. This unique experiment provides us with the ability to quantitatively follow complex chemical reactions on a surface as the reaction proceeds. We also use STM to follow the progress of chemical reactions on surfaces at the molecular level. Recently, we have used modern surface spectroscopies to study surface reactions that occur on particles in the atmosphere. We have shown, for example, that adsorbed water plays a major role in the surface chemistry of sea salt particles reacting with gas phase smog constituents in the marine troposphere. We have also shown that minor constituents of sea salt particles (e.g., Br-) segregate to the surface of the particles and are very important to subsequent heterogeneous chemistry. | |
| Publications |
"Pyridine adsorption and acid/base complex formation on ultrathin films of gamma-Al2O3 on NiAl(100)" Kathryn A. Layman, Michelle M. Ivey, and John C. Hemminger Journal of Physical Chemistry B, 107(33), 8538-8546 (2003) |
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"Characterization of ultrathin films of gamma-Al2O3 and the chemistry of 1,3-butadiene on NiAl(001) and gamma-Al2O3" Michelle M. Ivey, Kathryn A. Layman, Armen Avoyan, Heather C. Allen, and John C. Hemminger Journal of Physical Chemistry B, 107(26), 6391-6400 (2003) |
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"Synthesis of Molybdenum Nanowires with Millimeter-Scale Lengths Using Electrochemical Step Edge Decoration" M.P. Zach, K. Inazu, K.H. Ng, J.C. Hemminger, and R.M. Penner Chemistry of Materials,14 (2002) 3206 |
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"Effect of Carbon Deposits on Reactivity of Supported Pd Model Catalysts" Sh. Shaikhutdinov, M. Frank, M. Bumer, S.D. Jackson, R. Oldman, J.C. Hemminger, H.-J. Freund Catalysis Letters 80, 115 (2002). |
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"The Physical Chemistry of Airborne Sea Salt Particles and Their Components", Barbara Finlayson-Pitts and John C. Hemminger, The Journal of Physical Chemistry, 2000, 104(49), 11463-11477. |
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"Sigma-bond Metathesis on a Surface: Dehydrogenation of Cyclohexane on Hydrogen Saturated Pt(111)," Don A. Perry and John C. Hemminger, Journal of the American Chemical Society, 2000, 122, 8079. |
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"Surface Segregation of Bromine in Bromide doped NaCl: Implication for the Seasonal Variations in Arctic Ozone," Sutapa Ghosal, Alia Shbeeb, John C. Hemminger, Geophysical Research Letters, 2000, 27(13), 1879. |
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"Controlled Size-Nanometer Scale Reaction Vessels in Two Dimensions," Nafisi K, Samu J, Hemminger JC The Journal of Physical Chemistry B, 2000, 104, 10111. |
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"Heterogeneous Chemistry in the Troposphere: A Modern Surface Chemistry Approach to the Study of Fundamental Processes," John C. Hemminger, International Reviews of Physical Chemistry, 1999, 18, 387. |
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"Water Induced Reorganization of Ultrathin Nitrate Films on NaCl: Implications for the Tropospheric Chemistry of Sea Salt Particles," H.C. Allen, J.M. Laux, R. Vogt, B.J. Finlayson-Pitts, and John C. Hemminger, Journal of Physical Chemistry, 1996, 100, 6371. |
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"Photo Patterning of Self-Assembled Alkanethiolate Monolayers on Gold: A Simple Monolayer Photoresist Utilizing Aqueous Chemistry," Huang J, Dahlgren DA, Hemminger JC Langmuir 1994, 10, 626. |
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"The Conversion of Ethylene to Ethylidyne on Pt (111): Non-First Order Kinetics and Ensemble Effects," Erley W, Li Y, Land DP, Hemminger JC Surface Science 1994, 301, 177. |
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"Direct Observation of Surface Reactions by Scanning Tunneling Microscopy: Ethylene -> Ethylidyne -> Carbon Particles -> Graphite on Pt(111)," T.A. Land, T. Michely, R.J. Behm, John C. Hemminger, and G. Comsa, Journal of Chemical Physics,1992, 97, 6774. |
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| Research Centers | Institute for Surface and Interface Science | |
| AirUCI: The Center for Atmospheric Integrated Research Using Chemistry at Interfaces | ||
| Link to this profile | http://www.faculty.uci.edu/profile.cfm?faculty_id=2014 | |
| Last updated | 10/25/2007 | |
