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Multi-scale modelling and simulation of colloidal crystal self-assembling on chemically patterned surfaces

Final Activity Report Summary - COLLOID CRYSTAL (Multiscale modelling and simulation of colloidal crystal self-assembling on chemically patterned surfaces)

The technological demand and wealth creation opportunities for miniaturised devices and components are widely accepted. Among the many routes of deriving advanced functional materials critical to these innovations, colloidal self-assembling has increasingly drawn attention because potentially it is the most cost-effective process for producing the 2D and 3D superstructures. Colloidal self-assembly represents an emerging technique in producing superstructures with specific geometries possessing a broad range of feature sizes.

Within the project duration, we have developed a simulation platform that simulates the Brownian suspension as well as the colloidal migration and self-assembly at the drying front of the meniscus. The numerical outcome reveals a great deal of process details by taking into account the van der Waals-, electrostatic double layer -, hydrodynamic-, and Brownian forces. Experimentally, we achieved to device a new method in fabricating 2D colloidal close-packing crystals, which provides a versatile platform for nanosphere lithography, surface modification, and interfacial nano-architecture formation. The additional outcome of the project also includes the binary and trimodal colloidal crystal self-assembly that contributes to the fundamental understanding of crystal formation as well as fabrication of advanced functional materials.