Rapid and simple preparation of remarkably stable binary nanoparticle planet-satellite assemblies.

We demonstrate a straightforward nonbiomolecular approach for self-assembly of binary NP planet-satellite superstructures, which display remarkable colloidal and structural stability under variations in temperature, pH, ionic strength and solvent. The readily scalable process produces highly homogeneous samples and is tolerant to variations in building block size and shape, giving rapid access to a structurally diverse range of robust binary NP assemblies.