• Physical Vapor Deposition / CVD / Reactive Sputtering Techniques
• Nitride-based Ceramics and Group III - IV Semiconductors.
• Thin Film Sensors; including Temperature, Strain and Heat Flux.
• Ferroelectric Polymers, Thermochromic Polymers, and Sensors for IR Imaging
• Surface Chemistry and Microstructural Analysis (AFM, SEM, AES, ESCA, Optical Microscopy)
• Forensic engineering

Research Information

Dr. Gregory's work has appeared in numerous professional journals including: The Journal of the Electrochemical Society, Journal of American Ceramic Society, Applied Physics Letters, Thin Solid Films, Surface and Coatings Technology, Materials Letters, Journal of Materials Science, Sensors and Actuators A and B and others. He has written a chapter in an ACS text entitled "Integrated Circuits: Physical and Chemical Processing". Dr. Gregory has received two Fellowships from the U.S. Army Electronics Technology and Device Laboratory and presently holds 12 U.S. patents. He has received two College of Engineering Research Excellence Awards and presently hold the position of Distinguished Professor of Chemical Engineering.  He is currently the Co-Director of the Sensors and Surface Technology Partnership at the University of Rhode Island and  Director of the Thin Film Surface Analysis Laboratory at URI which houses a state of the art Perkin Elmer Mutitechnique Surface Analyzer complete with ESCA, SMS and Auger spectroscopy as well as SEM and sputter etching capability.

Publications and Patents

• G.Aniolek and O.J. Gregory, "Thin Film Thermocouples for Advanced Ceramic Gas Turbine Engines", Suface and Coating Technology, 68/69, P.70-75 (1994).
• E.E. Crisman, C.B. Roberts, O.J. Gregory and D.C. Morton, "Luminescence Measurements of GaN Specimens With Various Impurities", Proceedings of the Symposia on Large Area Wafer Growth and Processing for Electronic and Photonic Devices and the Twentieth State of the Art Program on Compound Semiconductors, Ed. D.N. Buckley, S.A. Ringel and F. Ren, Vol. 94-18, The Electrochemical Society, p. 163-174, 1995.
• O.J. Gregory, S.E. Dyer, P.S. Amons and A. Bruins Slot, “Characteristics of A Reactively Sputtered Indium Tin Oxide Thin Film Strain Gage for Use at Elevated Temperatures”, MRS Symposium Proceedings, 1995 Fall Meeting, Boston MA,Vol. 403, p.597-602, 1996.
• S.E. Dyer, O.J. Gregory, P.S. Amons, and A. Bruins Slot, "Preparation and Piezoresistive Properties of Reactively Sputtered ITO Thin Films", Thin Solid Films, 288,279-286, (1996).
• O.J. Gregory, A. Bruins Slot, P.S. Amons and E.E. Crisman, "High Temperature Strain Gages Based on Rectively Sputtered AlN Thin Films", Surface and Coatings Technology, 88,79-89 (1996).
• S.E. Dyer, O.J. Gregory and J.M. Cooke, “Improved Passivating Cr2O3 Scales  for Thin Film High Temperature PdCr Strain Gages”, Thin Solid Films, 312, p. 331- 340 (1998).
• O.J. Gregory and J. Cooke, “High Temperature Thin Film Strain Gages Based on Indium Tin Oxide”, Proceedings of NATO Research and Technology-AGARD Conference (Advisory Group for Aerospace Research and Development Conference), 90th Symposium on Advanced Non-Intrusive Instrumentation for Propulsion Engines, Brussels, Belgium, (October 1997).
• O.J. Gregory, S. Dyer and J. Cooke, “Overcoats for the Improved Performance of PdCr High Temperature Strain Gages”, Proceedings of NATO Research and Technology-AGARD Conference (Advisory Group for Aerospace Research and Development Conference), 90th Symposium on Advanced Non-Intrusive Instrumentation for Propulsion Engines, Brussels, Belgium, (October 1997).
• C.W. Brown, Y. Li, J.A. Seelenbinder, P. Pivarnik, A.G. Rand, S.V. Letcher, O.J. Gregory and M.J.Platek, “Immunoassays Based on Surface-Enhanced Infrared Absorption Spectroscopy, Analytical Chemistry, 70, no.14, p.2991-2996 (1998).
• O.J. Gregory, W.B. Euler, E.E. Crisman, H. Mogawer and K.A. Thomas, “Smart Optical Waveguide Sensors for Cumulative Damage Assessment”, Proceedings of SPIE-The International Society for Optical Engineering, Smart Structures and Materials 1999, Smart Systems for Bridges, Structures and Highways, S.C. Liu, editor, SPIE Press, Bellingham, WA, vol. 3671, p.100-108, (1999).
• A. Constant, H. Niska and O. Gregory, “Chemical Vapor Deposition of Alpha Aluminum Oxide for High Temperature Aerospace Sensors”, Journal of Vacuum Science and Technology A, 18, No. 4, p. 1653-1659 (2000).
• K.A. Thomas, W.B. Euler, E.E. Crisman and O.J. Gregory, “A Temperature Insensitive Smart Optical Strain Sensors” Proceedings of SPIE-The International Society for Optical Engineering, Smart Structures and Materials 2000, Smart Systems for Bridges, Structures and Highways, S.C. Liu, editor, SPIE Press, Bellingham, WA, vol. 3988, p.429-439, (2000).
• O. J. Gregory and Q. Luo, “A Self-Compensated Ceramic Strain Gage for Use at Elevated Temperatures”, Sensors and Actuators A; Physical Sensors, in press.
• O. J. Gregory and Q. Luo, “Ceramic Strain Sensors for Propulsion Health Monitoring”, 19th DASC (Digital Avionics Conference), IEEE (2000)
• S. Turner, H. Sun, M. Faghri and O.J. Gregory, ASME Publications Heat Transfer Division, “Effect of Surface Roughness on Gaseous Flow Through Microchannels”,Vol. 366, No. 2; pp.291-298 (2000).
• O. J. Gregory and Q. Luo, “Ceramic Strain Sensors for Propulsion Health Monitoring”, IEEE Proceedings of the 19th DASC (Digital Avionics Conference), (2000).
• M. Benz, W.B. Euler and O.J. Gregory, “The Influence of Preparation Conditions on the Surface Morphology of Poly(vinylidene fluoride) Films”, Langmuir, 17, p.239-243 (2001).
• O. J. Gregory and Q. Luo, “A Self-Compensated Ceramic Strain Gage for Use at Elevated Temperatures”, Sensors and Actuators A; Physical Sensors, 88, p.234-240 (2001).
• S. Turner, H. Sun, M. Faghri and O.J. Gregory, “Compressible Gas Flow Through Smooth and Rough Microchannels”, Proceedings of International Mechanical Engineering Congress and Exposition – Heat Transfer Division -24145 (2001).
• M. Benz, W.B. Euler and O.J. Gregory, “The Role of Solution Phase Water on the Deposition of Thin Films of Poly (vinylidene fluoride)”, Macromolecules, 35 (7), p. 2682-2688 (2002).
• O.J. Gregory, Q. Luo, J. Bienkiewicz, B.M. Erwin and E.E. Crisman, "An Apparent “n” to “p” Transition in Sputtered ITO High Temperature Strain Gages", Thin Solid Films, 405, p.263-269 (2002).
• O.J. Gregory, Q. Luo, and E.E. Crisman, "High Temperature Stability of Indium Tin Oxide Thin Films", Thin Solid Films, 406, p.286-293 (2002).
• Prism, American Society of Engineering Education Journal -Weapons of War, “25 Ways to Fight Terrorism” p. 27, February 2002.
• B.L. Lucht, W.B. Euler and O.J. Gregory, “Investigation of the Thermochromic Properties of Polythiophenes Dispersed in Host Polymers”, Polymer Preprints, 43(1), p.59-60 (2002).
• O.J. Gregory, T. You, E.E. Crisman, M.J. Platek, “Stabilization of Indium Tin Oxide Films at Very High Temperatures”, The Materials Research Society Symposium Proceedings, 751, Z3.33.1-Z3.33.6 (2003).
• O.J. Gregory, T. You, M. Platek and E.E. Crisman, “Stabilization of Ceramic Strain Gages to Temperatures Beyond 1500°C”, 49th International Instrumentation Symposium Proceedings -The Instrumentation, Systems and Automation Society - ISA Aerospace Industries Div. and Test Measurement Div. (2003).
• O.J. Gregory, M. Downey, T. Starr, S. Wnuk and V. Wnuk, “Improved Bond Coats for Thermal Spray Instrumentation”, 49th International Instrumentation Symposium Proceedings -The Instrumentation, Systems and Automation Society - ISA Aerospace Industries Div. and Test Measurement Div. (2003).

 

• "Ceramic Coatings for Temperature Measurement", August 2, 1992, U.S. Patent No. 5,135,795
• "A Thin-Film Quadrant Temperature Sensor For Use in a System to Control the Alignment of a CO2 Laser Beam", August 23, 1992, U.S. Patent No. 5,141,330
• "A Method of Enhancing the Electrical Conductivity of Transparent Electrode Stripes in Thin Film Electroluminescent Displays", Nov 17, 1992, U.S. Patent No. 5,163,220.
• "Doped-Germanium Sensor for Use in a System to Control the Alignment of a CO2 Laser Beam", December 1, 1992. U.S. Patent No. 5,168,321.
• "Monolithic Hollow Waveguide and Method and Apparatus For Making The Same", June 28, 1994, U.S. Patent No. 5,325,458.
• "Method of Preparing Ceramic Coatings for Temperature Measurement", August, 1994, U.S. Patent No. 5,338,566.
• “Method for Making Monolithic Hollow Waveguide”, March 7, 1995,US Patent No 5,395,480
• "Monolithic Hollow Waveguide Method", January 2, 1996, U.S. Patent No. 5,480,050.
• "Thin Film Strain Sensors Based on Interferometric Optical Measurements", O.J. Gregory, W.Euler, and G. Huston, Provisional Patent Application filed on 8/26/98, 60-097,989 Converted to standard US application August 1999.
• "Self Compensated Ceramic Strain Gage for Use at High Temperature", O.J. Gregory, Patent Application filed on 4/29/99, 60-131584.
• "Intensity Based Optical Waveguide Sensor", O.J. Gregory and W. Euler, Provisional Patent Application filed on 1/26/99, 09-890011, Converted to standard US application Nov. 1999.
• "Pyroelectric Polymers for IR Imaging", O.J. Gregory, W. Euler and A. Mengel, Patent Application filed on 9/27/99, Patent application 10-017794.
• "Thermochromic Polymers for Rapid Visual Assessment of Temperature", October 2002, B. Lucht, W. Euler and O.J. Gregory, US Patent No. 20020149003.

 

Ph.D. Brown University, 1983.
M.S. University of Rhode Island, 1977.
B.S. University of Rhode Island, 1975. 

Posts

Co-Director of Sensor and Surface Technology Partnership.
Director of Thin Films and Interfacial Research Center. 
Director of Thin Films  Surface Analyzer Laboratory