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Composite block polymer-microfabricated silicon nanoporous membrane.


ABSTRACT: Block polymers offer an attractive route to densely packed, monodisperse nanoscale pores. However, their fragility as thin films complicates their use as membranes. By integrating a block polymer film with a thin (100 microm) silicon substrate, we have developed a composite membrane providing both nanoscale size exclusion and fast transport of small molecules. Here we describe the fabrication of this membrane, evaluate its mechanical integrity, and demonstrate its transport properties for model solutes of large and small molecular weight. The ability to block large molecules without hindering smaller ones, coupled with the potential for surface modification of the polymer and the microelectromechanical system style of support, makes this composite membrane an attractive candidate for interfacing implantable sensing and drug-delivery devices with biological hosts.

SUBMITTER: Nuxoll EE 

PROVIDER: S-EPMC2772169 | biostudies-literature | 2009 Apr

REPOSITORIES: biostudies-literature

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Composite block polymer-microfabricated silicon nanoporous membrane.

Nuxoll Eric E EE   Hillmyer Marc A MA   Wang Ruifang R   Leighton C C   Siegel Ronald A RA  

ACS applied materials & interfaces 20090401 4


Block polymers offer an attractive route to densely packed, monodisperse nanoscale pores. However, their fragility as thin films complicates their use as membranes. By integrating a block polymer film with a thin (100 microm) silicon substrate, we have developed a composite membrane providing both nanoscale size exclusion and fast transport of small molecules. Here we describe the fabrication of this membrane, evaluate its mechanical integrity, and demonstrate its transport properties for model  ...[more]

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