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Switchable Hydrophobic-Hydrophilic Surfaces [electronic resource].

Published:
Washington, D.C. : United States. Dept. of Energy, 2002.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:
37 pages : digital, PDF file
Additional Creators:
Sandia National Laboratories, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary:
Tethered films of poly n-isopropylacrylamide (PNIPAM) films have been developed as materials that can be used to switch the chemistry of a surface in response to thermal activation. In water, PNIPAM exhibits a thermally-activated phase transition that is accompanied by significant changes in polymer volume, water contact angle, and protein adsorption characteristics. New synthesis routes have been developed to prepare PNIPAM films via in-situ polymerization on self-assembled monolayers. Swelling transitions in tethered films have been characterized using a wide range of techniques including surface plasmon resonance, attenuated total reflectance infrared spectroscopy, interfacial force microscopy, neutron reflectivity, and theoretical modeling. PNIPAM films have been deployed in integrated microfluidic systems. Switchable PNIPAM films have been investigated for a range of fluidic applications including fluid pumping via surface energy switching and switchable protein traps for pre-concentrating and separating proteins on microfluidic chips.
Report Numbers:
E 1.99:sand2002-3870
sand2002-3870
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Note:
Published through SciTech Connect.
12/01/2002.
"sand2002-3870"
CURRO, JOHN G.; BUNKER, BRUCE C.; KENT, MICHAEL S.; MANGINELL, ROLD P.; LOPEZ, GABRIEL P.; YIM, HYUN; HUBER, DALE L.; KUSHMERICK, JAMES G.; MENDEZ, SERGIO.
Type of Report and Period Covered Note:
Topical;
Funding Information:
AC04-94AL85000
View MARC record | catkey: 13811474