Directed Self-Assembly of Micron-Sized Gold Nanoplatelets into Oriented Flexible Stacks with Tunable Interplate Distance.

摘要: A growing demand for control over the interparticle spacing and orientation of anisotropic metallic particles into self-assembled structures is fuelled by their use in potential applications such as plasmonics, catalysis, sensing, optoelectronics. Here, we present an improved high yield synthesis method to fabricate micron- submicron-sized gold nanoplatelets with a thickness less than 20 nm using silver seeds. By tuning depth secondary minimum DLVO interaction between these particles, are able assemble platelets dynamic flexible stacks containing thousands arranged face-to-face well-defined spacing. Moreover, demonstrate that length stacks, interplate distance can be controlled tens hundreds ionic strength. We frequency external electric field direct highly organized 2D 3D assemblies tha...