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dc.contributor.authorLurio, Laurence
dc.contributor.authorKoga, Tadanori
dc.contributor.authorJiang, N.
dc.contributor.authorGin, P.
dc.contributor.authorEndoh, M.K.
dc.contributor.authorNarayanan, S.
dc.contributor.authorSinha, S.K.
dc.date.accessioned2013-06-19T19:22:06Z
dc.date.available2013-06-19T19:22:06Z
dc.date.issued2011
dc.identifier.citationT. Koga, N. Jiang, P. Gin, M.K. Endoh, S. Narayanan, L.B. Lurio, and S.K. Sinha, "Impact of an Irreversibly Adsorbed Layer on Local Viscosity of nanoconfined Polymer Melts", Phys. Rev. Lett. 107, 225901 (2011)en_US
dc.identifier.issn0031-9007
dc.identifier.urihttp://commons.lib.niu.edu/handle/10843/13527
dc.identifier.urihttp://hdl.handle.net/10843/13527
dc.description.abstractWe report the origin of the effect of nanoscale confinement on the local viscosity of entangled polystyrene (PS) films at temperatures far above the glass transition temperature. By using marker x-ray photon correlation spectroscopy with gold nanoparticles embedded in the PS films prepared on solid substrates, we have determined the local viscosity as a function of the distance from the polymer-substrate interface. The results show the impact of a very thin adsorbed layer ( 7 nm in thickness) even without specific interactions of the polymer with the substrate, overcoming the effect of a surface mobile layer at the air-polymer interface and thereby resulting in a significant increase in the local viscosity as approaching the substrate interface.en_US
dc.description.sponsorshipT. K. acknowledges the financial support from NSF Grant No. CMMI-084626. Uses of the Advanced Photon Source and the National Synchrotron Light Source were supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contracts No. DE-AC02- 06CH11357 and No. DE-AC02-98CH10886, respectively.en_US
dc.language.isoen_USen_US
dc.publisherAmerican Physical Societyen_US
dc.titleImpact of an Irreversibly Adsorbed Layer on Local Viscosity of Nanoconfined Polymer Meltsen_US
dc.typeArticleen_US
dc.altlocation.urihttp://dx.doi.org/10.1103/PhysRevLett.107.225901en_US
dc.contributor.departmentDepartment of Physics


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