Diffusion and Filtration Properties of Self-Assembled Gold Nanocrystal Membranes
Nano Letters2011Vol. 11(6), pp. 2430–2435
Citations Over TimeTop 10% of 2011 papers
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.
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