Self-assembly of binary nanoparticle dispersions: From square arrays and stripe phases to colloidal corralsC. I. Mendoza and E. Batta
Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México - Apdo. Postal 70-360, 04510 México, D.F., Mexico
received 15 January 2009; accepted in final form 19 February 2009; published March 2009
published online 20 March 2009
The generation of nanoscale square and stripe patterns is of major technological importance since they are compatible with industry-standard electronic circuitry. Recently, a blend of diblock copolymer interacting via hydrogen bonding was shown to self-assemble in square arrays. Motivated by those experiments we study, using Monte Carlo simulations, the pattern formation in a two-dimensional binary mixture of colloidal particles interacting via isotropic core-corona potentials. We find a rich variety of patterns that can be grouped mainly in aggregates that self-assemble in regular square lattices or in alternate strips. Other morphologies observed include colloidal corrals that are potentially useful as surface templating agents. This work shows the unexpected versatility of this simple model to produce a variety of patterns with high technological potential.
64.75.Yz - Self-assembly.
82.70.Dd - Colloids.
82.35.Jk - Copolymers, phase transitions, structure.
© EPLA 2009