Synthesis and micrometer-scale assembly of colloidal CdSe/CdS nanorods prepared by a seeded growth approach
Synthesis and micrometer-scale assembly of colloidal CdSe/CdS nanorods prepared by a seeded growth approach
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DOI：
10.1021/nl0717661
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发表时间：
2007-10-01
期刊：
影响因子：
10.8
通讯作者：
Manna, Liberato
中科院分区：
文献类型：
--
作者：
Carbone, Luigi;Nobile, Concetta;Manna, Liberato
到目前为止已报道的胶体半导体纳米棒的主要限制是长度和直径的显著分布以及当前合成路线产生的不规则形状的存在，以及最后，制造大面积定向纳米棒阵列的能力较差。在这里，我们报道了一种种子生长的方法来合成形状规则、直径和长度分布窄的非对称核壳CdSe/CDS纳米棒，后者可以很容易地调节到150 nm。这些棒是强荧光的，表现出线偏振发射，因此发射能量主要取决于芯径。我们演示了它们的横向对准以及它们在基板上的垂直自对准，最大面积可达几平方微米。
Key limitations of the colloidal semiconductor nanorods that have been reported so far are a significant distribution of lengths and diameters as well as the presence of irregular shapes produced by the current synthetic routes and, finally, the poor ability to fabricate large areas of oriented nanorod arrays. Here, we report a seeded-growth approach to the synthesis of asymmetric core-shell CdSe/CdS nanorods with regular shapes and narrow distributions of rod diameters and lengths, the latter being easily tunable up to 150 nm. These rods are highly fluorescent and show linearly polarized emission, whereby the emission energy depends mainly on the core diameter. We demonstrate their lateral alignment as well as their vertical self-alignment on substrates up to areas of several square micrometers.