A technique to the self-assembly of nanoparticles into aligned, single arrays is presented. The approach uses a facile route in which ID arrays of submicrometer-sized nanoparticles are reproducibly formed along the step edges of micrometer-scale stripe patterns in a large area. The formation of ID array structures consisting of colloidal spheres by a combination of both the convective flow and the crossing of the solid stripes. When the solvent influx carries the suspended spheres to the three-phase contact line, the presence of the stripe patterns results in a shadow effect. The opposite side of the step edge of the stripe pattern helps in the formation of colloidal arrays. They can move into the step edge via lateral capillary forces between the particle in the middle of the trench surfaces and the side of the stripe generating the aligned single arrays. This technique for self-assembly into aligned ID arrays can serve in the preparation of other nanomaterials such as rods, tubes, or wires, and metal colloids, which can be used in photonic and plasmonic applications.
All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)
- Materials Chemistry