• NSF CAREER Award (2007-2012)
• NSF International Research Fellow, Katholieke Universiteit Leuven, Belgium (2003-2004)

Galson Corporation, Hawthorne, NY (1991-1993)
Litton-PRC, Arlington, VA (1993-1996)

Our research group focuses on the synthesis of well-defined nanoparticles, their dispersion into polymer solutions and melts, and their suspension rheology.

First, we study the mechanisms that produce well-defined nanoparticles and then use this knowledge to optimize for a range of industrially relevant properties such as particle stability, surface expression, or catalytic activity. We are also interested in developing timely methods for determining nanoparticle growth rates inside of emulsions which are used in formulating a variety of commercial products like fiber-optic coatings, automotive finishes, and chromatographic packings.

Second, we examine how grafting uniform polymers to the interfaces of well-defined nanoparticles affects their rheological behavior in polymer solutions and melts. With our fundamental studies, we seek to optimize processing to achieve a desirable microstructure in industrial suspensions, and to set a foundation for developing constitutive rheological models that predict the complex behavior of industrial suspensions. To this end, we use rheological and rheo-optical measurements to elucidate how the interactions within model suspensions affect their flow at nano-, micro-, and macroscopic length scales the full range of interactions that effect the processing of engineered materials.

Selected Publications

D.L. Green, L. McAmish, and A.V. McCormick, “Three-Dimensional Pore Connectivity in Bi-axially Stretched Microporous Composite Membranes,” Journal of Membrane Science, 279, 100-110 (2006).

D. Green and J. Mewis, “Connecting the Wetting and Rheological Behaviors of Polymer-grafted Nanospheres in Polymer Melts, Langmuir, 22, 9546-9553 (2006)

D. L. Green, M. T. Harris, S. Jayasundra, J. S. Lin, M. Z.-C. Hu, and, Y. F. Lam, "Early Stage Silica Formation in Methanol and Ethanol," Ceramic Transactions, 137 (2003).

D.L. Green, J.S. Lin, Y.-F. Lam, M.Z.-C. Hu, D. W. Schaefer, and M.T. Harris, "Size, Volume Fraction, and Nucleation of Stober Silica Nanoparticles," Journal of Colloid and Interface Science, 266:346-358 (2003).

D. Green, S. Jayasundera, and M.T. Harris, "Chemical Reaction Kinetics Leading to the First Stober Silica Nanoparticles NMR and SAXS Investigation," Journal of Non-Crystalline Solids, 315:166-179 (2003).

D. Green and A. Davis, "Photocatalytic Oxidation of Cadmium-EDTA with Titanium Dioxide," Environmental Science and Technology, 33:609-617 (1999).