Abstract

Paul H. Holloway
University of Florida
Department of Materials Science and Engineering

November 12, 2007
3:30- 4:30pm
MEC Rm. 339

"Synthesis, Luminescence, and Applications of Nanophosphors"

ABSTRACT:

Phosphor particles whose diameter is about 2 to 3 nm have very unusual properties. Quantum states and confinement of their excitons may shift their absorption and emission energies. Such effects are important for tuning their luminescence stimulated by photons (photoluminescence-PL) or electrons (electroluminescence-EL or cathodoluminescence-CL). Various methods for synthesizing II-VI (where II is Cd or Zn and VI is S, Se or O) and doped Gd 2O 3 nanophosphors will be discussed, as well as their resulting properties. Decoupling of quantum effects on excitation and emission will be described, along with the use of nanoparticles as sensitizers in phosphors. Procedures for and results of functionalizing the nanophosphors for use as markers in biological systems will also be briefly described.

BIO:

Paul Holloway is Distinguished Professor and the Ellis Verink, Jr. Professor of Materials Science and Engineering at the University of Florida, Gainesville. He is also the Director of MICROFABRITECH, an interdisciplinary materials research program at the University of Florida. Prof. Holloway received his Ph.D. in 1972 from the Rensselaer Polytechnic Institute. He has worked at General Electric and at Sandia National Laboratory. He has received numerous teaching and research awards including being selected for the Alpha Sigma Mu Award of Excellence in 1987, College Teacher of the Year at the University of Florida in 1988, the E.W. Muller Award for Excellence in Surface Science from the University of Wisconsin-Milwaukee, a Professional Excellence Program Award from the University of Florida in 1994, was elected Fellow of the AVS in 1993, and made an Honorary Member in 1997. He received the Albert Nerken Award from the AVS in 1999. He was elected a Fellow of ASM International in 2000. He was named a Distinguished Professor in 2000. He has served as President of the AVS and has held numerous other offices in that society. He is active in the Materials Research Society, The Metallurgical Society, the American Society for Metals (ASM), The Materials Society (TMS), and the American Society for Testing and Materials. He is a member of the following honor societies: Phi Kappa Phi, Alpha Sigma Nu, Sigma Pi Sigma, Phi Eta Sigma, Phi Mu Epsilon, and Keramos. He was Editor-in-Chief of Critical Reviews in Solid State and Materials Sciences from 1992-2005, and serves or has served on the Editorial Boards of Surface Science Spectra, the Journal of Vacuum Science and Technology, Surface and Interface Analysis, Surface Science and Thin Solid Films. Professor Holloway has published more than 340 articles and edited six books. He has given numerous invited talks and keynote addresses at international meetings including National Symposia of the AVS, the Mexican Vacuum Society, the American Chemical Society, the Society for Photo-Optical Instrumentation Engineers, The Metallurgical Society, the Materials Research Society, and the Electrochemical Society. Prof. Holloway is also a regular short course instructor in vacuum science for the AVS. Prof. Holloway has 7 patents issued and 6 patents pending. Prof. Holloway is internationally recognized for his work in quantitative surface analysis; grain boundary and thin film diffusion, oxidation, and adhesion in microelectronic devices; thin film processing for microelectromechanical (MEMS) systems; contacts to semiconductors; surface passivation of compound semiconductors; basic science of wide-gap materials for light emitting diodes and lasers; and advanced phosphors for display technologies. Professor Holloway is listed in several references including Who's Who in America, Who's Who in Science and Technology, Who's Who in the Southeast, and the International Directory of Distinguished Leadership.

 

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