Directed self-assembly of gold-tipped CdSe nanorods

Asaf Salant, Ella Amitay-Sadovsky, Uri Banin*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

146 Scopus citations


Gold-tipped CdSe rods (nanodumbbells) were solubilized in an aqueous phase and self-assembled in a head-to-tail manner using biotin disulfide and avidin. The disulfide end of the biotin molecule attaches to the gold tip of the nanodumbbell, and the biotin end of the molecule is able to conjugate to an avidin protein. The avidin can strongly conjugate up to four biotin molecules. Changing the ratios of biotin to nanodumbbells leads to the formation of dimers, trimers, and flowerlike structures. To further improve the distribution of chain lengths, a separation method based upon weight was applied using a concentration gradient. The gold tips provide effective anchor points for constructing complex nanorod structures by self-assembly.

Original languageAmerican English
Pages (from-to)10006-10007
Number of pages2
JournalJournal of the American Chemical Society
Issue number31
StatePublished - 9 Aug 2006


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