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Gold nanorod dimers were prepared in aqueous solution. The nanorod dimers were separated from other nanorod assemblies by a stepwise density-gradient centrifugation using sucrose (20, 30, 40, 50, and 60%… Click to show full abstract
Gold nanorod dimers were prepared in aqueous solution. The nanorod dimers were separated from other nanorod assemblies by a stepwise density-gradient centrifugation using sucrose (20, 30, 40, 50, and 60% w/w). The centrifugation step (3400 × g, 20 min) produced two bands, a side-wall sediment, and a bottom precipitate. The topmost band contained nanorod monomers. The bottom precipitate was redispersed in water, and its surface plasmon band was consistent with that of a theoretical model of a nanorod dimer. Thus, density gradient centrifugation is effective in fractionizing nanorod dimers.
Journal Title: Chemistry Letters
Year Published: 2017
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