The effect of extensional flow on apparent shear viscosity has never previously been directly measured nor is it often considered. Here, for the first time, through using a novel configuration (two-phase response under flow), we have viscoelastic polymer solution in controlled and kinematically mixed manner. We show, via control transient experiment, that deformation depends not only rate but a...

A microfluidic-based directed assembly strategy is employed to form highly aligned supramolecular structures. Formation of aligned synthetic oligopeptide nanostructures is accomplished using planar extensional flow, which induces alignment of underlying material suprastructures. Fluidic-directed assembly of supramolecular structures allows for unprecedented manipulation at the nano- and mesosca...

The manufacture of optical fibers typically involves taking a solid glass cylinder (a blank or preform), heating it up to melting temperature by feeding it through a cylindrical furnace (the drawing tower), and drawing the molten blank from the other end of the furnace at high speed (tens of meters per second). Since the drawing speed is much faster than the feeding speed (by a factor of at lea...

The quantification of cellular mechanical properties is of tremendous interest in biology and medicine. Recent microfluidic technologies that infer cellular mechanical properties based on analysis of cellular deformations during microchannel traversal have dramatically improved throughput over traditional single-cell rheological tools, yet the extraction of material parameters from these measur...

A systematic experimental investigation of the coupling between extensional flow and crystallization a commercial grade polypropylene is presented. modified Sentmanat device allows one to generate uniaxial in absence gravity sagging monitoring its effect on kinetics via in-situ visualization sample polarised light. As compared shear induced crystallization, three fold increase extension found. ...