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Jinbo He, Qingling Zhang, Suresh Gupta, Todd Emrick, Thomas P. Russell and Pappannan Thiyagarajan Drying Droplets: A Window into the Behavior of Nanorods at Interfaces Small 3

Version of Record online: 1 JUN 2007 | DOI: 10.1002/smll.200700055

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CdSe nanorods were found to assemble at an oil–water interface (on the surface of water droplets) as shown by small-angle neutron scattering. When nanorod-covered droplets were dried on a substrate, the decrease in interfacial area produced an in-plane compression, leading to various two-dimensional packing motifs for the nanorods across the droplet surface, from a low-density random packing to a more dense smectic ordering to a crystalline phase (see image).

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