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| Name: |
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Roger G. Tobin |
| Title: |
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Professor
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| Departmental Affiliation: |
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Physics & Astronomy Department
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| Degrees: |
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Ph.D. in Physics 1985 University of California, Berkeley, California; M.A. in Physics 1982 University of California, Berkeley, California; A.B. in Physics 1978 Harvard College, Cambridge, Massachusetts, summa cum laude. |
| Expertise: |
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Experimental condensed matter physics, surface science.
Infrared spectroscopy of surfaces and interfaces;
Chemisorption on metals,
Adsorbate effects on electronic conduction,
Physics and chemistry of chemical sensors;
Metallic quantum wells;
Development and exploitation of novel techniques for surface infrared spectroscopy.
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| E-mail: |
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roger.tobin@tufts.edu
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| Other websites: |
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http://www.tufts.edu/~rtobin/
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| Scholarship & Research: |
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My research centers on understanding the interactions of atoms and molecules with metal surfaces. The field is interdisciplinary, touching not only condensed matter physics, but also physical chemistry, catalysis, and technology.
Specific areas of current interest include the effects of adsorption (the binding of atoms or molecules to the surface) on electronic conduction in metals; the influence of quantized electron states in ultrathin metal films on the binding of molecules to the film surface; and the surface chemistry of prototype gas sensors for use in harsh environments.
Undergraduates, graduate students, and postdoctoral researchers all participate actively in these projects. They become expert in vacuum techniques, thin-film growth and characterization, and optics. More generally, they learn to be scientists: to design and conduct experiments, analyze data, and communicate effectively both orally and in writing.
Selected publications:
"Unusual adsorption kinetics of formic acid on Cu(100) studied by dc resistance and nonresonant infrared reflectance changes," C.-L. Hsu, E.F. McCullen and R.G. Tobin, Surface Science 542, 120 (2003).
"A surface-science-based model for the selectivity of platinum-gold electrodes in zirconia-based NOx sensors," D.C. Skelton, R.G. Tobin, D.K. Lambert, C.L. DiMaggio and G.B. Fisher, Sensors and Actuators B: Chemical 96, 46 (2003).
"Mechanisms of adsorbate-induced surface resistivity – experimental and theoretical developments," R.G. Tobin, Surface Science 502-503, 374 (2002).
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