Nanotubule-Based Molecular-Filtration Membranes

Author:

Jirage Kshama B.1,Hulteen John C.1,Martin Charles R.1

Affiliation:

1. Department of Chemistry, Colorado State University, Fort Collins, CO 80523, USA.

Abstract

Polymeric membranes that contain a collection of monodisperse gold nanotubules, with inside diameters of molecular dimensions (less than 1 nanometer), were used in a simple membrane-permeation experiment to cleanly separate small molecules on the basis of molecular size. For example, when such a membrane was presented with an aqueous feed solution containing pyridine (molecular weight 79) and quinine (molecular weight 324), only the smaller pyridine molecule was transported through the nanotubules and into a receiver solution on the other side of the membrane.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference29 articles.

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2. Abelson P. H., ibid. 224, 1421 (1989).

3. Liu C., Martin C. R., Nature 352, 50 (1991).

4. “Membrane Separation Systems—A Research Needs Assessment” (Department of Energy Rep. DE90-01170 U.S. Department of Energy Washington DC April 1990).

5. R. W. Spillman Chem. Eng. Prog. 85 41 (1989).

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