Alan G Joly
Senior Research Scientist II, Fundamental and Computational Sciences Directorate, Chemical and Material Sciences Division, Chemical Structure and DynamicsDual Assignment
WR Wiley Environmental Molecular Sciences Laboratory / Environmental Spectroscopy & Biogeochemistry Facility
Current Activities and Projects
Investigation of wide band gap and nanoparticle materials using laser spectroscopy.
Research Interests
Present research focuses on the use of time-resolved spectroscopies to study fundamental photo-physical processes in both nanoparticles and semiconductor single crystals. Laser desorption and photoemission electron microscopy experiments are presently underway to elucidate the fundamental processes which occur following photo-excitation in oxide semiconductors such as TiO2 and α-Fe2O3. Time-resolved pump-probe experiments at a variety of wavelengths and pulse-widths are used to measure the carrier dynamics and understand the sequence of events that ultimately leads to desorption of neutral oxygen and adsorbates from the surface of metal oxide single crystals. Similar techniques are used to study the primary photo-physics of various nanoparticle materials with the aim of understanding the differences between the nanoparticles and bulk materials. Time-resolved luminescence spectra and lifetime measurements are employed to understand the fundamental physical processes leading to both luminescence and up-conversion luminescence in a variety of nanoparticle materials.
Past Experience
1993 to Present: Research Scientist, Pacific Northwest National Laboratory
1990 to 1993: Postdoctoral Research Associate, W.R. Wiley Environmental and Molecular Sciences Laboratory, Pacific Northwest National Laboratory.
Education
Ph.D.in Chemistry, September 1990, Massachusetts Institute of Technology, Cambridge, MA.
Dissertation: "Photochemistry and Photodissociation of Organometallic Carbonyls in Solution Investigated with Femtosecond Transient Absorption Spectroscopy."
B.S. in Chemistry, May 1985, University of Rochester, Rochester, NY.
