Art Baddorf (bottom left of picture) received his B.A summa cum laude from Wheaton College in Math and Physics.  At the University of Pennsylvania his research involved the use in inelastic and elastic electron scattering to study the static and dynamic properties of surfaces, especially with light atoms adsorbed.  His thesis completed in 1987 was titled “Structural and Vibrational Responses of a Metal Surface to Chemisorption of Light Adatoms: Hydrogen, Oxygen and Nitrogen on Copper (110).”  Three of his highly cited papers originating from this period are:

• J. M. Mundenar, A.P. Baddorf, E.W. Plummer, L.G. Sneddon, R.A. DiDio, and D.M.
• Zehner, “Oxygen Chemisorption on the Copper(110) Surface,” Surf. Sci.   188, 15 (1987).
• P. Baddorf, I.-W. Lyo, E. W. Plummer, and H. L. Davis, “Removal of Surface
• Relaxation of Cu(110) by Hydrogen Adsorption,” J. Vac. Sci. Technol.  A   5, 782 (1987).
• P. Baddorf and E. W. Plummer, “Enhanced Surface Anharmonicity Observed in Vibrations on Cu(110),” Phys. Rev. Lett.  66, 2770 (1991).

Art went to Oak Ridge National Laboratory after graduation, working in the Surface Physics Group in the Solid State Division. He is now "Imaging Functionality" Group Leader in the Center for Nanophase Materials Sciences at ORNL. His recent research has been associated with imaging functionality.

• P. Baddorf, “Scanning Tunneling Potentiometry: The Power of STM applied to Electrical Transport,” book chapter in “"Scanning Probe Microscopy: Electrical and Electromechanical Phenomena at the Nanoscale," eds. S. V. Kalinin and A. Gruverman, (Springer Verlag, New York, NY, 2006) pp 11-30.

Joe Mundenar (on the top-right of picture) was a Chemistry major at the University of Pennsylvania, working with Professor Larry Sneddon.  His thesis complete in 1988 was titled “Adsorption Studies on Single-Crystal Nickel Aluminum Alloy and Related Surfaces.” Several of Joe’s papers are listed below.

• Electronic and Vibrational Properties of Single Crystal Surfaces of NiAl, S.-C. Lui, J.M. Mundenar, E.W. Plummer,  M. Mostoller, R. Nicklow, D.M. Zehner, W.K. Ford, and J. Erskine, Mat. Res. Soc.  Symp. Proc.  83, 47 (1987).
• Carbon Monoxide Adsorption on NiAl (110) and (111) Surfaces, J.M. Mundenar, R. Gaylord, S.C.Lui, E.W. Plummer,  D.M. Zehner, W. K. Ford and L. G. Sneddon, Mat. Res. Soc.  Symp. Proc.  83 , 59 (1987).
• An Experimental Study of Hydrogen Adsorption on Simple Metals:  Al and Na,  J. M. Mundenar, R. Murphy, K. D. Tsuei and E. W. Plummer, Chemical Physics Lett., 43  593 (1988)
• Oxygen Chemisorption on the Copper(110) Surface,  J. M. Mundenar, A.P. Baddorf, E.W. Plummer, L.G. Sneddon, R.A. DiDio, and D.M. Zehner, Surf. Sci.   188, 15 (1987).

After completion of his Ph.D Joe went to work for IBM in IBM-Burlington, NH. In 1997 he moved to Segate, where he is a Senior Manager.

Kelly Ray (on the right in picture) worked on the electronic and vibrational properties of H adsorbed on Be surface.  Kelly published several important papers but never completed his Ph.D thesis.

• An Experimental Study of Hydrogen Adsorption on Beryllium, K. Ray, J. Hannon and E. W. Plummer,  Chem. Physics Lett. 171, 469 (1990).
• Anomolous Interplanar Expansion at the (0001) Surface of Be, H. L. Davis, J. B. Hannon, K. B. Ray, and E. W. Plummer, Phys. Rev. Lett. 68, 2632 (1992).
• The Interaction of H with Be(0001): A Photoemission Investigation, K. B. Ray, X. Pan and E. W. Plummer, Surf. Sci. 285, 66 (1993)