Salant Asaf, Amitay-Sadovsky Ella, Banin Uri
Institute of Chemistry and the Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem 91904, Israel.
J Am Chem Soc. 2006 Aug 9;128(31):10006-7. doi: 10.1021/ja063192s.
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.
金纳米棒（纳米哑铃）被溶解在水相中，并使用二硫代生物素和抗生物素蛋白以头对头的方式自组装。生物素分子的二硫端连接到纳米哑铃的金端，而分子的生物素端能够与抗生物素蛋白结合。抗生物素蛋白可以强烈结合多达四个生物素分子。改变生物素与纳米哑铃的比例会导致二聚体、三聚体和花状结构的形成。为了进一步改善链长的分布，使用浓度梯度基于重量的分离方法。金端为通过自组装构建复杂的纳米棒结构提供了有效的锚定点。
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