Michael T. Harris, Purdue University
March 18, 2010
11:00 AM - 12:00 PM
810 South Clinton Street, Chicago, IL 60612
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Surface Mineralization, Alignment, and Programmed-Self Assembly of the TMV Biotemplate
This presentation focuses on the use of a well-defined plant virus, Tobacco mosaic virus (TMV) to develop strategies for the assembly, patterning and functionalization of nanoscale surface features and devices. Current and ongoing studies have lead to methodologies for the uniform coating of viral templates with reactive metals as well as techniques for the patterned self-assembly of these bio-templates. Additional efforts have begun to investigate the efficacy of incorporating viral based nanotemplates into functional devices including hydrogen sensors and battery electrodes. The goals of this research are directed at developing and characterizing methods for the hierarchical assembly of virus-based materials onto surfaces and within solutions. Functionalized virus-based assemblies will then be analyzed for their surface and conducting properties. Our goal is to assemble, for the first time, simple patterned structures and circuits from ordered arrays of virus nanotemplates.
One potential method for aligning the coated TMV nanorods involves the evaporation of sessile drops of colloidal dispersions. The ability to control the deposition pattern can be achieved by understanding how evaporation of the liquid affects the fluid flow inside the drop and how the fluid flow affects the particle deposition profile. The second part of this presentation will describe the use of computational fluid dynamics to solve numerically the evaporation dynamics along the drop interface, the induced fluid flow profile inside the drop and its effect on the deposition pattern of the particles on the substrate. Future plans involve the use of a modified version of this computer code to model the application of external fields in the controlled deposition of particles on a substrate during the evaporation of a sessile drop.
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