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Anthony Dinsmore

Professor

We study the statistical mechanics of soft matter: colloids, lipid-bilayer vesicles, emulsions, nanoparticle suspensions and other squishy things. Our experiments probe the relationships among inter-particle forces, structure, and dynamics of many-bodied systems -- relationships that are central to research in condensed-matter physics. We also apply this fundamental understanding to develop materials at the nanometer scale. Self-assembled materials have truly unique mechanical, optical and electronic properties with applications in nanotechnology and biomedical engineering.

Current Research
We focus on the behavior of nanoparticles and proteins on fluid interfaces, including lipid bilayer membranes and interfaces between immiscible fluids (such as on the surfaces of oil droplets in water). In both of these systems, bound particles or proteins can deform the interface, which can lead to attraction or repulsion between the particles or proteins. In the context of lipid membranes, we study the binding of proteins in the BAR family, which are part of the endocytic pathway; we seek to understand how the shape, composition, and tension of the lipid membrane modify the protein binding and in-plane assembly and thereby control function. Related experiments probe binding, in-plane assembly, and trans-migration of nanoparticles through membranes with the goal of developing new responsive materials. In the context of fluid-fluid interfaces, we study the binding and assembly of nanoparticles with the goal of developing new materials with applications ranging from oil-spill clean-up to printing of low-cost analytical chemical devices.

Learn more at people.umass.edu/dinsmore/

Academic Background

  • PhD University of Pennsylvania (1997)
Jaime B. Hutchison, Aruni P.K. K. Karunanayake Mudiyanselage, Robert M. Weis, A. D. Dinsmore, "The Role of Osmotically-induced Tension in Binding of N-BAR to Lipid Vesicles," submitted (2014).
Kan Du, Elizabeth Glogowski, M. T. Tuominen, T. Emrick, T. P. Russell, A. D. Dinsmore, "Self-assembly of Gold Nanoparticles on Gallium Droplets: Controlling Charge Transport through Microscopic Devices," Langmuir 29(44), 13640-13646 (2013). DOI: 10.1021/la403263z.
Derek A. Wood, C. D. Santangelo, A. D. Dinsmore, "Self-Assembly on a Cylinder: A Model System for Understanding the Constraint of Commensurability," Soft Matter 9, 10016-10024 (2013). DOI: 10.1039/C3SM51735G.
J. B. Hutchison, R. M. Weis, A. D. Dinsmore, “Change of Line Tension in Phase-Separated Vesicles upon Protein Binding,” Langmuir 28, 5176 (2012). DOI: 10.1021/la204225a.
Chuan Zeng, Fabian Brau, Benny Davidovitch, A. D. Dinsmore, "Capillary Interactions among Spherical Particles at Curved Liquid Interfaces," Soft Matter 8, 8582 (2012). DOI: 10.1039/C2SM25871D.
 
Contact Info

Department of Physics
404 Hasbrouck
North Pleasant Street
Amherst, MA 01003-9292

(413) 545-3786
dinsmore@physics.umass.edu

people.umass.edu/dinsmore/