Carbone Luigi, Nobile Concetta, De Giorgi Milena, Sala Fabio Della, Morello Giovanni, Pompa Pierpaolo, Hytch Martin, Snoeck Etienne, Fiore Angela, Franchini Isabella R, Nadasan Monica, Silvestre Albert F, Chiodo Letizia, Kudera Stefan, Cingolani Roberto, Krahne Roman, Manna Liberato
NNL-National Nanotechnology Laboratory of CNR-INFM and IIT Research Unit, via per Arnesano, km 5, 73100 Lecce, Italy.
Nano Lett. 2007 Oct;7(10):2942-50. doi: 10.1021/nl0717661. Epub 2007 Sep 11.
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.
目前已报道的胶体半导体纳米棒的主要局限性在于，其长度和直径分布显著，并且存在由当前合成路线产生的不规则形状，最后，制备大面积取向纳米棒阵列的能力较差。在此，我们报道了一种种子生长法，用于合成具有规则形状、窄直径和长度分布的不对称核壳CdSe/CdS纳米棒，后者的长度可轻松调节至150纳米。这些纳米棒具有高荧光性，并显示出线性偏振发射，发射能量主要取决于核直径。我们展示了它们在高达几平方微米面积的基底上的横向排列以及垂直自排列。
