COSAM » COSAM Faculty » Chemistry and Biochemistry » Jimmy Mills

Jimmy Mills
Chemistry and Biochemistry
Professor

Research Areas: Physical

Address:
179 Chemistry Building

Phone: (334) 844-6974
E-Mail: millsge@auburn.edu


Education

Technical University of West Berlin, Ph.D.
1985
Argonne National Laboratory, Post-Doctoral Fellow
1987
California Institute of Technology, Research Fellow
1989
M.S., University of Chile
1981


Professional Employment

Professor, Department of Chemistry and Biochemistry, Auburn University
2014- present
Associate Professor, Department of Chemistry and Biochemistry
1995-2014
Assistant Professor, Department of Chemistry and Biochemistry, Auburn University
1989- 1995
Research Fellow, California Institute of Technology
1987- 1989
Post-Doctoral Fellow, Argonne National
1985-1987
Graduate Assistant, Hahn Meitner Institute
1981- 1984
Research Assistant, University of Chile
March-December 1979


Honors and Awards

Technical Advisory Committee Award
1998
Director's Partnership Award
1993
Visting Scholar, Argonne National Lab
1991
Grant-in-aid, for research on "Degradation of Pollutants by Sonochemical Reactions", Auburn University
1990
Highlighted Poster, 7th International Conference on Photochemical Conversion and Storage of Solar Energy
July 31-August 5, 1988


Professional Activities

American Chemical Society; Chair-Elect and Chairman, Auburn Section, 1993-1995
Chair and organizer of Symposium on "Model AgXSystems:, Society for Imaging Science and Technology, 50th Annual Conference, Cambridge, MA 1997
Session Chair, "Topics in Materials Physics and Chemistry" Session, 10th Annual Alabama Materials Research Conference, Auburn, September 1996
Chair Poster Session, Society for Imaging Science and Technology, 48th Annual Conference, Washington D.C. May 1995
Panel Member, Electorhydraulic Civitation and Sonolysis, EPR/NSF Advance Oxidation Symposium, San Fransisco, CA, February 1993
Session Chair, "Electronic and Optical Materials Session", 6th Annual Alabama Materials Research Conference, Auburn, October 1992
Reviewer of manuscripts for the following journals: ACS Applied Materials and Interfaces, African Journal of Pure and Applied Chemistry, Chemical Physical Letters, Chemistry of Materials, Chemosphere, Colloid and Polymer Sciences, Colloids and Surfaces, Energy and Fuels, Enviromental Science and Technology, Inorganic Chemistry, Israel Journal of Chemistry, Journal of Advanced Oxidations Technologies, Journal of Applied Physics, Journal of Colloid and Interface Science, Journal of Cluster Science, Journal of Hazardous Materials, Journal of Nanoparticle Research, Journal of Nansicience and Nanotechnology, Journal of Photochemistry and Photobiology, Journal of Physical Chemistry, Journal of American Chemical Society, Journal of Vacuum Science and Technology, Langmuir, Materials Research Bulletin, Physical Chemistry-Chemical Physics, Research of Chemical Intermediateds, RSC Advances, Surface Science, Talanta, Thin Solid Films, Ultrasound and Sonochemistry


Research and Teaching Interests

Physical Chemistry: Generation of metal and metal-oxide crystallites with nanometer dimensions in nonpolar solvents and investigation of their thermal as well as lubricating properties.  Macromolecular photosensitive systems for inactivation of toxins and pathogens with free radicals, adaptive polymer films that experience reversible photochemical transformations for controlling and sensing of chemicals. 

Overview

A long-term goal of our work has been the elucidation of the processes leading to formation of solids in liquids, mainly as colloids. An important challenge was the achievement of highly concentrated colloids of nanometer-sized crystallites that remain stable for long times in fluids.  Our studies in this area have enabled the preparation of stable colloids containing spherical Ag and CuO particles with concentrations equal or above 0.1 M in liquid polymers and alkanes.  Shown in the Figure is an image obtained with a CitoViva optical microscope of Ag crystallites in PEG 600, a liquid poly(ethylene glycol); the various colors originate from crystallites with different sizes.  The Ag and CuO colloids are stable ‘nanofluids” exhibiting enhancements in thermal conductivity of about 20% and, more importantly, they possess excellent lubricating properties including low coefficients of friction together with reduced wear.  Recent efforts have been centered on the synthesis of concentrated colloids consisting of spherical Ag particles and of rod-shaped CuO crystallites in hydrocarbons.  Furthermore, utilization of small SiO2 particles as building blocks for achieving hierarchical structures has led to the reversible formation of transparent silica fibers.

CytoViva Image

Another area of interest involves exploration of the photochemical properties of macromolecular blends containing sulphonated poly(ether etherketone), SPEEK, and poly(vinyl alcohol), PVA. Benzophenone (BP) groups of SPEEK undergo light-excitation to triplet states that abstract H-atoms from PVA yielding strongly reducing polymeric SPEEK• radicals.  Light-exposure of SPEEK/PVA blends in water generated metallic nanometer-sized crystallites.  Small metal particles were also formed via illumination of BP in alkanes, providing an alternative method to achieve metallic particles in such difficult-to-work solvents.  Our current interest is focused on the ability of SPEEK/PVA films to serve as protective (self-decontaminating) barriers against toxins.  Shown in the Figure is a scheme representing the reduction of O2 by SPEEK• to form H2O2, used extensively for the inactivation of microorganisms and toxins.  Formation of H2O2 enables the protective function of the films to continue even in the absence of light.  Another significant reaction induced by SPEEK• is the degradation of toxic chemicals, an example presented in the Figure is the transformation of the halocarbon R’X.  The polymer radical has also been used to transform dyes present in SPEEK/PVA films into forms with different colors, as exemplified in the Figure where D represents a dye.  Since the reduced dye is easily re-oxidized, the redox state and the color of the incorporated dyes can be switched in a reversible fashion by photolysis of SPEEK/PVA films.

photoactive film



Selected Publications

1. Lockhart, P.; Little, B. K.; Slaten, B. L.; Mills, G. “Photogeneration of H2O2 in Water-Swollen SPEEK/PVA Polymer Films” J. Phys. Chem. A 2016, 120, 3867-3877. PDF

2. Little, B. K.; Lockhart, P.; Slaten, B. L.; Mills, G. “Photogeneration of H2O2 in SPEEK/PVA Aqueous Polymer Solutions” J. Phys. Chem. A 2013, 117, 4148-4157. PDF

3. Clary, D. R.; Nabil, M.; Sedeh, M. M.; El-Hasadi, Y.; Mills, G. “Photochemical Generation of Ag, Pd and Pt Particles in Octane” J. Phys. Chem. C 2012, 116, 9243. PDF

4. Clary, D. R.; Mills, G. “Photochemical Generation of Nanometer-Sized Cu Particles in Octane” J. Phys. Chem. C 2011 115, 14656-14663. PDF

5. Clary, D. R.; Mills, G. “Preparation and Thermal Properties of CuO Particles” J. Phys. Chem. C 2011 115, 1767-1775. PDF







Last updated: 08/18/2016