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Heterosupramolecular chemistry : Recognition Initiated and Inhibited Silver Nanocrystal Aggregation
- Ryan, D (author)
- Rao, S N (author)
-
- Rensmo, Håkan (author)
- Uppsala universitet,Fysiska institutionen
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- Fitzmaurice, D (author)
- Preece, J A (author)
- Wenger, S (author)
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- (creator_code:org_t)
- 2000-06-16
- 2000
- English.
- In: Journal of the American Chemical Society. - : American Chemical Society (ACS). - 0002-7863 .- 1520-5126. ; 122:26, s. 6252-6257
- Journal article (peer-reviewed)
Abstract
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- Near size-monodisperse silver nanocrystals stabilized by chemisorption of a mixture of an alkane thiol (85%) and an alkane thiol incorporating a dibenzo-24-crown-8 moiety (15%) have been prepared. Using dynamic light scattering and nuclear magnetic resonance, it is shown that addition of bis-dibenzylammonium dication initiates aggregation of the silver nanocrystal dispersion by pseudorotaxane assembly. It is also shown that addition of excess dibenzylammonium cation or dibenzo-24-crown-8 inhibits further aggregation. This novel demonstration of controlled nanocrystal aggregation points the way toward the programmed assembly of complex nanocrystal architectures in solution.
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- Rao, S N
- Rensmo, Håkan
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