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Nano Lett. 2011 Jun 8;11(6):2430-5. doi: 10.1021/nl200841a. Epub 2011 May 6.

Diffusion and filtration properties of self-assembled gold nanocrystal membranes.

Author information

1
James Franck Institute, University of Chicago, Chicago, Illinois 60637, United States.

Abstract

Close-packed nanoparticle monolayers have recently been shown to form mechanically robust, free-standing membranes. We report the first measurements of molecular transport through such ultrathin sheets, self-assembled from dodecanethiol-ligated gold nanocrystals. For aqueous solutions we find filtration coefficients 2 orders of magnitude larger than those observed in polymer-based filters, sieving of large solutes, and for smaller solutes a pronounced dependence of rejection on being charged. These results open up new possibilities for controlled delivery and separation of nano-objects.

PMID:
21548617
DOI:
10.1021/nl200841a
[Indexed for MEDLINE]

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