Faculty and Staff

Chris D. Geddes

Dr Chris D. Geddes, PhD, FRSC.
Professor, Director

The Institute of Fluorescence
The Columbus Center
701 East Pratt Street, Baltimore, MD, 21202, USAProf. Geddes' Office:  410 576 5723
Publication Office:  410 576 5721
Main Lab: 410 576 5720
E-mail: geddes@umbc.edu


Twitter: @chrisdgeddes

Positions and Education:

  • Kodak Ltd funded Ph.D., Harrow, London, at the University of Wa les, Swansea, 1992-1996
  • Post-Doctoral Research Fellow, University of Strathclyde, Glasgow, Scotland, UK, 1997-2000.
  • Senior Post-Doctoral Research Fellow, University of Strathclyde, Glasgow, Scotland, UK, 2000-2001.
  • Assistant Professor, University of Maryland Biotechnology Institute, UMBI, Nov 2001-2003.
  • Assistant Professor, University of Maryland School of Medicine, Adjunct Appointment, May 2003.
  • Associate Professor, University of Maryland Biotechnology Institute, UMBI, 2003 - 2005
  • Professor, University of Maryland Biotechnology Institute, UMBI, 2005-present
  • Editor-in-Chief: The Journal of Fluorescence, Nov 2001 - Present.
  • Founding Editor-in-Chief: Plasmonics, Jan 2005 - Present.
  • Associate Director of NIH P41 "Center for Fluorescence Spectroscopy" August 2004 - August 2007.
  • Professor and Director: The Institute of Fluorescence, IoF, UMBI, founded 2001 - June 30th 2010.
  • Professor and Director: The Institute of Fluorescence, IoF, UMBC, July 1st 2010 - Present.
  • Professor, Chemistry and Biochemistry, UMBC, April 24th 2010 - Present.

Honors (Professional qualifications):

  • Fellow of the Royal Society of Chemistry (FRSC, CChem, CSci), Fellow, Charted Chemist and Scientist.
  • Fellow of the Institute of Physics (FInstP, CPhys), Charted Physicist.
  • Member of the American Chemical Society (ACS) and Biophysical Society.
  • Member of the Society of Fluorescence (MSoF). Executive Director: The Society of Fluorescence.
  • Member of SPIE.
  • Member of the BioPhysical Society.

Peer Review:

  • Founding Editor-in-chief: Reviews in Fluorescence, 2002-Present.
  • Founding Editor-in-chief: Reviews in Plasmonics, Jan 2005 - Present.
  • Editorial Board Member: Dyes and Pigments, 2001-Present.
  • Co-Series Editor: The Topics in Fluorescence Spectroscopy Series.
  • Founding Editor-in-chief: The Who's Who in Fluorescence Annual Volume, 2001-Present.
  • Ad Hoc Reviewer: The National Institutes of Health (NIH) and National Science Foundation (NSF).
  • NIH Study Section Chair, Permanent Member of NIH EBT study section.
  • Scientific Publication Consultant / International Advisory Board for "Springer" publishers.
  • Editorial Board Member: Journal of Photochemistry. 2012 - Present.
  • Editorial Board Member: Recent Patents in Material Science. 2011 - Present.
  • Editorial Board Member: Frontiers in Analytical Chemistry. 2012 - Present.

Research Interests:

My research interests are underpinned by the Institute of Fluorescence’s expansive fluorescence and plasmonics programs. These include developing new fluorescence-based approaches for clinical sensing and spectroscopy; the development of devices for health care and safeguard; the use of low-power microwaves for kinetically accelerating assays, bio-recognition events and the triggering of Chemiluminescence, as well as the development of metal-enhanced fluorescence and plasmon-enhanced phenomenon. Over the last few years I have invested a significant portions of my time developing a Unified Description for the interactions of fluorophores / luminophore with surface plasmons. Despite the early observations of close-range interactions of metal and fluorophores dating back to the 1970s, the phenomenon known as Metal-Enhanced Fluorescence (MEF) has recently attracted the worldwide attention of scientists from biomedicine and biotechnology. Metal-fluorophore interactions have also been named surface-enhanced fluorescence and radiative decay engineering, by both us and others, offering no and partial explanation to the phenomenon, respectively. MEF terminology was first used in an article in 2002 by my group, which we feel offers a much wider description of metal-fluorophore interactions. In 2005, a new mechanistic description called the Radiating Plasmon Model was postulated by my coworkers and I, that emphasizes the importance of the scattering efficiency of plasmonic nanoparticles on MEF. These interpretations are now contained within a significantly more developed Unified Plasmon-Fluorophore Theory (UPFT) currently being developed. In more recent years, we have been clinically validating some of the MEF assays we have developed.

Specialty Keywords:

Metal-Enhanced Fluorescence (MEF); Surface-Enhanced Fluorescence (SEF); Radiative Decay Engineering (RDE); Metal-Enhanced Chemiluminescence (MEC); Microwave-Triggered Chemiluminescence; Microwave-Accelerated Metal-Enhanced Fluorescence (MAMEF); Surface-Plasmon Coupled Fluorescence / Emission (SPCE and SPCF); Radiating Plasmons; Photophysics of Metals and Fluorophores.

Additional Publications not on the main Publication List:

  1. Fluorescence anisotropy in sol-gels – microviscosities or growing silica nanoparticles offering a new approach to sol-gel structure elucidation ?, Geddes, C.D.; Karolin, J.; Birch, D.J.S., Journal of Fluorescence, (2002),12(2), 135-137 pdf
  2. 1 and 2-photon fluorescence anisotropy decay in silicon alkoxide sol-gels: Interpretation in terms of self-assembled nanoparticles, Geddes, C.D.; Karolin, J.; Birch, D.J.S., Jn. Phys. Chem. B, (2002), 106(15), 3835-3841 pdf
  3. Sol-gel nanometrology: Gated sampling can reveal initial sol formation kinetics, Geddes, C.D.; Karolin, J.; Birch, D.J.S., Journal of Fluorescence, (2002), 12(1), 113-117 pdf
  4. Nanoparticle metrology in sol-gels using multiphoton excited fluorescence anisotropy decay, Karolin, J.; Geddes, C.D.; Wynne, K.; Birch, D.J.S., Meas. Sci. Technol., (2002), 13, 21-27 pdf
  5. 1 and 2-photon fluorescence anisotropy decay to probe the kinetic and structural evolution of sol-gel glasses – A Summary, Geddes, C.D.; Journal of Fluorescence, (2002), 12(3/4), 343- 367 pdf
  6. Fluorescent indolium dyes for applications in aqueous halide sensing – part 2: The repeated alkylation of Harmane post quaternisation, Geddes, C.D., Dyes and Pigments, (2001), 50 (2), 151-155 pdf
  7. Chloride sensitive fluorescent indicators, Geddes, C.D.; Karolin, J.; Apperson, K.; Birch, D.J.S., Anal. Biochem, (2001), 293(1), 60-66 pdf
  8. Halide sensing using the SPQ molecule, Geddes, C.D.; Sensors and Actuators B: Chemical, (2001), 72 (2), 188-195 pdf
  9. Chloride sensitive probes for biological applications, Geddes, C.D.; Apperson, K.; Karolin, J.; Birch, D.J.S., Dyes and Pigments,(2001), 48(3), 227-231 pdf
  10. Optical halide sensing using fluorescence quenching: Theory, simulations and applications – A review, Geddes, C.D., An invited review article commissioned by the Institute of Physics. Meas. Sci. Technol., (2001), 12(9), R53-R88 pdf
  11. Multi-photon excited fluorescence particle sizing: application to silica hydrogels. David J.S. Birch, C. Geddes, J. Karolin and K. Wynne SPIE Proc. 4252, 97-103, (2001) pdf
  12. A Halide sensor based on the quenching of fluorescence of an immobilised indolium salt, Geddes, C.D.; Journal of Photochemistry and Photobiology A: Chemistry, (2000), 137(2-3), 145-153 pdf
  13. Sol-gel particle growth studied using fluorescence anisotropy: An alternative to scattering techniques, Birch, D.J.S.; Geddes, C.D., Phys. Rev. E., (2000), 62(2), 2977-2980 pdf
  14. Optical thin film polymeric sensors for the determination of aqueous chloride, bromide and iodide ions at high pH, based on the quenching of fluorescence of two acridinium dyes, Geddes, C.D., Dyes and Pigments, (2000), 45(3), 243-251 pdf
  15. Fluorescence metrology of silica sol-gels: The effect of D2O and Inorganic salts, Birch, D.J.S.; Geddes, C.D., P. Indian AS-Chem. Sci., (2000),112(3), 311-322 pdf
  16. Nanometre resolution of silica hydrogel formation using time-resolved fluorescence anisotropy, Geddes, C.D.; Birch, D.J.S., Jn. Non-Cryst. Sol., (2000), 270(1-3), 191-204 pdf
  17. Cluster dynamics, growth and syneresis during silica hydrogel polymerisation, Birch, D.J.S.; Geddes, C.D., Chem. Phys. Letts, (2000), 320(3-4), 229-236 pdf
  18. Fluorescent dyes bound to hydrophilic copolymers - Applications for aqueous halide sensing, Geddes, C.D.; Douglas, P., App. Poly. Sci.,(2000), 76(5), 603-615 pdf
  19. New fluorescent Quinolinium dyes - Applications in nanometre particle sizing, Geddes, C.D.; Apperson, K.; Birch, D.S,J., Dyes and Pigments, (2000), 44, 69-74 pdf
  20. Application of fluorescence depolarisation to dye uptake and particle sizing in silica sols, C D Geddes, David J.S. Birch, K Apperson, J M Chevers and I P McKeown SPIE Proc. 3602, 75-84, (1999) pdf
  21. Probing the sol-gel transition in SiO2 hydrogels - A new application of near Infrared fluorescence, Geddes, C.D.; Chevers, J.M.; Birch, D.J.S., Journal of Fluorescence, (1999), 9(1), 73-80 pdf
  22. A compact optical flow cell for use in aqueous halide determination, Geddes, C.D.; Moore, D.C.P.;.Egerton, P.L., Sci. Technol., (1999) N34-N37 pdf
  23. Optical thin film sensors for the determination of aqueous halide ions, Geddes, C.D.; Douglas,P.; Moore, C.P.;.Wear,T.J.;.Egerton, P.L., Journal of Fluorescence, (1999), 9(3), 163-171 pdf
  24. New Indolium and Quinolinium dyes sensitive to aqueous halide ions at physiological concentrations, Geddes, C.D.; Douglas, P.; Moore, C.P.;.Wear, T.J.;.Egerton, P.L., Jn. Heterocyclic Chem., (1999), 36(4), 949-951 pdf
  25. New fluorescent Indolium and Quinolinium dyes for applications in aqueous halide sensing, Geddes, C.D.; Douglas, P.; Moore, C.P.; Wear, T.J.; Egerton,P.L.; Dyes and Pigments, (1999), 43(1), 59-63 pdf

Additional Book Chapters not on the main Publication List:

  1. Fluorescence nanometrology in sol-gels, David J.S. Birch, C D Geddes, J Karolin, R Leishman and O J Rolinski Spinger Series on Fluorescence Spectroscopy, Imaging and Probes. Ch. 3. 69-84, 2002. pdf