Nanorheology of polymers, block copolymers, and complex fluids

A. Levent Demirel, Lenore Dai, Ali Dhinojwala, Steve Granick, J. M. Drake

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations

Abstract

The shear rheology of molecularly-thin films of fluids has been studied experimentally as it depends on sinusoidal frequency (linear response) or on sliding velocity (nonlinear response). Building upon previous identification of a solid-like state that is induced by confinement, we find the shear-induced transition to a sliding state in which the viscous dissipation is essentially velocity-independent. The mechanism appears to involve wall slip but Fourier transforms of the response reveal fluctuations, intrinsic to the sliding state, over all accessible frequencies. Other ongoing studies involve shear-induced changes in the fluorescence of confined fluorescent probes, shear dilatancy, and the contrast between the shear of simple nonpolar fluids, and block copolymers.

Original languageEnglish (US)
Title of host publicationMaterials Research Society Symposium - Proceedings
PublisherMaterials Research Society
Pages113-122
Number of pages10
Volume366
StatePublished - 1995
Externally publishedYes
EventProceedings of the 1994 MRS Fall Meeting - Boston, MA, USA
Duration: Nov 28 1994Dec 1 1994

Other

OtherProceedings of the 1994 MRS Fall Meeting
CityBoston, MA, USA
Period11/28/9412/1/94

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

Cite this

Demirel, A. L., Dai, L., Dhinojwala, A., Granick, S., & Drake, J. M. (1995). Nanorheology of polymers, block copolymers, and complex fluids. In Materials Research Society Symposium - Proceedings (Vol. 366, pp. 113-122). Materials Research Society.