Polymer and sphere diffusion in confinement

We use video microscopy and particle tracking to study the diffusion of both colloidal spheres and polymers in slit microchannels. The molecules are allowed to sample the entire height of the microchannel. We find that the sphere data agrees well with a gap-averaged Oseen linear superposition approximation even at very high confinement whereas polymer chains at high confinement can not be modeled by this far field approach. We find that the polymer chain dynamics at high confinement can be explained well by a blob model scaling.

Department dc:contributor.department

Massachusetts Institute of Technology. Dept. of Chemical Engineering.

Grantor dc:publisher

Massachusetts Institute of Technology

Year dc:date.issued

2005

Author dc:creator

• Gupta, Malancha, 1980-

Advisor dc:contributor.advisor

• Patrick S. Doyle.

• Chemical Engineering.

Statement dc:rights

• M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission.

Licence dc:rights.uri

• http://dspace.mit.edu/handle/1721.1/7582

Language dc:language.iso

en_US

Handle dc:identifier.uri

http://hdl.handle.net/1721.1/28849

OAI identifier oai:identifier

oai:dspace.mit.edu:1721.1/28849