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Expert in Surface Science, Thin Films, Interactions of Ion Beams With Surfaces, Sputtering, Film Deposition
Available for your Consulting and Expert Witness Needs
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Summary of Expertise:
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Listed with other top experts in: |
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Expert is an expert in materials surface sciences, and is interested in the fundamental mechanisms, chemical physics and electronic processes in materials. His background includes physical chemistry, surface science, surface physics, vacuum science, and materials science. Expert has studied physisorption and chemisorption of gases on metals and semiconductors by using surface analysis techniques, resulting in over 100 publications over the past 20 years. This work has concentrated on the kinetics and thermodynamics of chemisorbed species, the electronic and structural aspects of adsorbates, and surface reconstruction and relaxation. He also applies this knowledge to problems in catalysis (heterogeneous and multicomponent), corrosion of metals, thin film deposition (vapor, vacuum, ion implantation, sputter, and evaporated films), thin films (optical properties and dielectric films), and electronic structure. He has published many papers on ion implantation. He utilizes many spectroscopy techniques, including X-ray photoelectron, UV photoemission, Auger, ion scattering, and optical, to study these material surfaces. He also consults for chemical companies, oil companies and the semiconductor industry.
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Expert has recently become very familiar with diamond films. He has used low-energy carbon ion beams to deposit thin films that have a diamond structure. These films are bonded to the substrate surface by means of carbine chemical bonds. Such films have been prepared on substrates of silicon, nickel, tungsten, tantalum and gold. The films are electrically insulating, have high heat conductivity, are optically-transparent, can be doped to form semiconductors, and are heat-resistant.
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Expert has been an active researcher in this area since 1972. His work has included studies of gas phase and solid-phase materials, and has resulted in more than 100 publications. His experience has also included building and using the spectrometers, and developing some of the theoretical and interpretative methodology. He has written one book in the area.
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Expert has worked in this area since 1979, and his emphasis has been on designing and building time-of-flight scattering and recoiling spectrometers that have been used for surface structure analysis. Interatomic spacings in surfaces can be determined to an accuracy of 0.1A, including light atoms such as hydrogen. Ion scattering spectrometry has been his main focus for the past 20 years.
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Expert has designed and constructed six ultrahigh vacuum spectrometer systems over the past 20 years. He has a thorough knowledge of pumps, vacuum welding, vacuum-compatible materials, and vacuum measurements. He has experience with high- and low-temperature vacuum seals.
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Expert' research group has developed a new deposition technique that uses low-energy mass selected ion beams to directly deposit thin films. His group has designed an instrument for this, advantageous because films can be deposited at low temperatures, isotopic purity is possible, deposition is under clean UHV conditions, and there is good control over the stoichiometry for compound films.
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For the past 15 years, much of Expert' research group work has been in the sputtering of surfaces by energetic ions, sputtering yields, selective sputtering, reactive ion etching, ion-surface electronic change exchange, scattered and sputtered ion fractions, and chemical sputtering.
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Expert' Ph.D. research was in UV and visible absorption and emission spectroscopy, and he is very knowledgeable in molecular and atomic absorption, emission spectroscopy, flourescence, and phosphorescence. He has also worked in ion-induced photon emission from surfaces. His Ph.D. dissertation was about fluorescence and phosphoresence spectroscopy, and molecular luminescence.
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Expert has studied adsorption and chemisorption of gases on metal, semiconductor, and compound surfaces. Experimentally, he has used several surface analysis techniques to determine the adsorbate coverages and site positions on these surfaces.
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Expert is an expert in X-ray and UV photoelectron spectroscopy. He has applied it to studies of many different types of materials and has consulted with industries on its application to their problems.
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Expert does film deposition using low-energy ion beams, different from molecular beam epitaxy (MBE) or implantation.
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Expert has experience in various analytical techniques, such as x-ray photoelectron spectroscopy, Auger electron spectroscopy, secondary ion mass spectrometry, ion scattering spectrometry, mass spectrometry, low energy electron diffraction, optical absorption and emission spectroscopy, and infrared spectroscopy. He has published papers that have used these techniques for analysis.
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Expert has much experience, through ion scattering and recoiling research, in atomic collisions in the gas phase and on surfaces.
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Expert has used optical absorption spectroscopy in the far UV region.
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Expert has extensive knowledge of inorganic chemistry.
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Expert has designed five ultrahigh vacuum spectrometer systems and published the designs.
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Expert has used low-energy electron diffraction (LEED) for the last 25 years in research.
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Expert has extensive experience in welding stainless steel for vacuum seals.
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Show Secondary and Basic Areas of Expertise | Localities:
Expert may consult nationally and internationally, and is also local to the following cities: Houston, Texas;
Pasadena, Texas;
Beaumont, Texas;
Baytown, Texas;
Sugar Land, Texas;
Port Arthur, Texas;
Galveston, Texas;
Missouri City, Texas;
and Lake Charles, Louisiana.
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Degree |
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Subject |
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Institution |
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1970
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PhD
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Physical Chemistry
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Louisiana State University
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1966
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BS
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Chemistry
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University of Southwest Louisiana
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Title |
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Responsibilities |
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1975 to
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(Undisclosed)
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Distinguished Professor Of Chemistry
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Expert is engaged in research and teaching.
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1971 to 1975
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University of Pittsburgh
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Assistant Professor
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Expert was engaged in research and teaching.
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Associations/Societies
Expert is a member of the American Chemical Society, the
American Physical Society, and a Fellow of the American Vacuum Society.
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Awards/Recognition
Expert's honors include: the Ester Farfel Award of the University of Houston (1993); member of the Louisiana State University Hall of Distinction (1988); Cullen Distinguished Chair at the University of Houston (1988 to present); and, the University of Houston Research Excellence Award (1985). He has given over 170 invited lectures.
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Publications and Patents Summary
He has over 340 publications in refereed journals, three patents, and three books.
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Selected Publications and Publishers
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- International Journal of Mass Spectrometry and Ion Processes
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- The Journal of Physical Chemistry
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- The Journal of Vacuum Science and Technology
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- Journal of Chemical Physics
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- The Journal of Physical Chemistry
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Recent Client Requests:
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Expert in UV radiation for consulting on possible physical and chemical mechanisms of instability in a multilayer thin film structure under UV illumination.
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Expert in vacuum leak detection for consulting on leak detection in oil line for vac process.
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Click the green button above to contact
Expert for a free initial screening call regarding your expert consulting needs.
Expert is available for consulting to corporate, legal and government clients.
Remember, your initial screening call to speak with
Expert is free.
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Click the green button above to contact
Expert for a free initial screening call regarding expert testimony,
litigation consulting and support, forensic services, or any related expert witness services.
A few litigation needs include product liability, personal injury, economic loss, intellectual property
(patent, trademark, trade secret, copyright), and insurance matters. Remember, your initial screening
call to speak with
Expert is free.
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| Language Skills: |
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| Foreign Language |
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Description |
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French
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Expert speaks French.
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| Additional Skills and Services: |
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Supplier and Vendor Location and Selection Expert has experience locating vendors of: vacuum pumps; vacuum equipment; surface analysis equipment; spectrometers; and, scientific electronics. He has access to the following resources: personal contacts; catalogs.
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Education
