期刊
NANO LETTERS
卷 11, 期 6, 页码 2430-2435出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl200841a
关键词
Nanoparticle; self-assembly; membranes; diffusion; filtration
类别
资金
- NSF [DMR-0907075, CBET-0932812, DMR-0820054]
- U.S. Department of Energy (DOE), BES-Materials Sciences [DE-AC02-06CH11357]
- DOE Center for Nanoscale Materials
- Directorate For Engineering
- Div Of Chem, Bioeng, Env, & Transp Sys [0932812] Funding Source: National Science Foundation
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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