Education

Chemistry (Ph.D., Cornell, 1991)

Research interests

My research has integrated a broad range of techniques to provide geometric, electronic and vibrational structure with kinetic information to understand relatively complex systems from an atomic and molecular point of view. I have been primarily interested in oxide surface chemistry and in molecular adsorption and ordering processes, and organic film growth at metal single crystal surfaces. The group is also involved in development and application of statistical methods for data analysis and instrument development for electron spectroscopy. An important component is the use of theoretical methods, such as ab initio electronic structure calculations (HF,DFT) to complement and interpret experimental data, including occupied and virtual orbitals, potential energy surfaces for internal degrees of freedom, and vibrational frequencies. Specifically, the group uses electron-based techniques for diffraction (low energy electron diffraction, (LEED)), vibrational spectroscopy (high resolution electron energy loss spectroscopy, HREELS), electronic structure (X-ray or UV photoelectron spectroscopy, (XPS, UPS)), and kinetics (thermal desorption spectroscopy, TDS). We are interested as well in photon-based techniques, making extensive use of reflection absorption infrared spectroscopy (RAIRS, FTIR, IRAS), and have demonstrated the possibility of using reflectance anisotropy (RA), also known as differential reflectance, for following molecular adsorption and ordering at metal surfaces.

Current activity in the group centers around two areas: 1) development of state-of-the-art methods for "Inelastic Diffraction", combining the high energy resolution of HREELS (~2 meV, 16 cm-1), for measuring vibrational excitation in electron beam scattering, with high momentum resolution in spot profile analysis LEED optics. 2) investigation of the physical chemical aspects of oxide gas sensors, including the role of adsorption, desorption kinetics, defect reactions, diffusion processes and the mechanisms by which these processes control conductivity in thin films and single crystals.

Publications

• S. Ma, F. G. Amar, B. G. Frederick, “Surface heterogeneity and diffusion in the desorption of methanol from WO3(100) surfaces”, J. Phys. Chem. A 107 (2003) 1413-1423.
• R.H. Jackson, L.J. LeGore, Z. Yang, P. Kleban, and B.G. Frederick, "Application of the Interleaved Comb Chopper to TOF Electron Spectrometry", Surf. Sci.502-503 (2002) 240-248.
• L.J. LeGore, R.H. Jackson, Z. Yang, P. Kleban, L.K. DeNoyer, and B.G. Frederick, “Advantages of Maximum Likelihood Methods for PRBS Modulated TOF Electron Spectrometry” Surf. Sci. 502-503 (2002) 232-239.
• B. Fruhberger, N. Stirling, F. G. Grillo, S. Ma, D. Ruthven, R. J. Lad, B. G. Frederick, "Detection and quantification of nitric oxide in human breath using a semiconducting oxide based chemiresistive microsensor", Sensors and Actuators B 76 (2001) 226-234.
• B. G. Frederick , T. Hildebrandt, C. C. Perry, Q. Chen, A. W. Munz ,Th. Bertrams, V. Zielasek, N. V. Richardson and M. Henzler, “Inelastic Diffraction in Coadsorbed Periodic Structures”, Surf. Sci. 418 (1998) 407-419.
• B. G. Frederick, J. R. Power, R. J. Cole, C. C. Perry, Q. Chen, S. Haq, Th. Bertrams, N. V. Richardson and P. Weightman, “Adsorbate azimuthal orientation from reflectance anisotropy” Phys. Rev. Lett. 80 (1998) 4490-4493.
• B. G. Frederick, Q. Chen, F. M. Leibsle, M. B. Lee, K. J. Kitching and N. V. Richardson, “Long range periodicitiy in c(8x2) benzoate/Cu(110) surface: A combined STM, LEED and HREELS Study,"Surf. Sci., 394 (1997) 1-25.
• B. G. Frederick, Q. Chen, F. M. Leibsle, S.S. Dhesi and N. V. Richardson, “Electron stimulated disordering in c(8x2) benzoate/Cu(110) surface: A combined STM, LEED and HREELS Study," Surf. Sci., 394 (1997) 26-46.
• B. G. Frederick, F. M. Leibsle, S. Haq and N. V. Richardson, "Evolution of lateral order and molecular re-orientation in the benzoate/Cu{110} system", Surf. Rev. Lett., 3 (1996) 1523-1546.
• B. G. Frederick, G. L. Nyberg and N. V. Richardson, "Spectral restoration in HREELS," Proc. 7th Int. Conf. Vibrations at Surfaces, Italy, June 1993, J. Electron Spectrosc. Rel. Phenom. 64/65 (1993) 825-835.
• B. G. Frederick, T. S. Jones, P. D. A. Pudney and N. V. Richardson, "HREELS and RAIRS? A complete vibrational study of the surface benzoate species on copper," Proc. 7th Int. Conf. Vibrations at Surfaces, Italy, June 1993, J. Electron Spectrosc. Rel. Phenom. 64/65 (1993) 115-123.
• B. G. Frederick, G. Apai and T. N. Rhodin, "Surface phonons in thin aluminium oxide films; thickness, beam energy, and symmetry mixing effects," Phys. Rev. B 44 (1991) 1880-1891.
• B. G. Frederick, G. Apai and T. N. Rhodin, "An XPS study of rhodium carbonyls adsorbed on planar aluminas: formation of geminal dicarbonyl species," J. Am. Chem. Soc. 109 (1987) 4797-4804.
• L.J. LeGore, R. H. Jackson III, Z. Y.Yang, L. K. DeNoyer, P. H. Kleban, B. G. Frederick "Spectroscopy Instrument Using Broadband Modulation and Statistical Estimation Techniques to Account for Component Artifacts", US Patent 6,782,342 B2, Aug. 24, 2004.
• N. LeCursi, L. J. LeGore, R. H. Jackson III, C. B. H. Crothers, P. H. Kleban, B. G. Frederick, "Fabrication of Chopper for Particle Beam Instrument", US Patent 6,781,120 B2, Aug. 24, 2004.

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