Abstract:
Binary nanocrystal superlattices (BNSLs) of two different nanocrystals (NCs) with
precise size and chemical composition were studied in this present work. NCs with
different sizes and compositions mixed at ambient condition shows different kinds of
self-assembly. These results strongly suggest that the radius ratio and the number
density of individual NCs have a significant influence on the self-assembly process as
mentioned in the literature. Moreover, when we performed the assembly at the
different time and temperature, it was observed that single/monolayer (made of two
different kinds of NCs positioned randomly) could be obtained at a lower temperature
and lower time conditions. UV-Vis-NIR and XPS studies provided strong support
towards the presence of an interaction between two types of NCs in the solution phase
mixing also.
