Abstract: Methods of producing a plurality of particle aggregates having a specified number of member particles are provided according to embodiments of the present invention. Specific methods include stimulating a plurality of particles with an aggregation stimulus to form a plurality of particle aggregates and then quenching the aggregation stimulus in order to inhibit further particle aggregation. An individual particle aggregate of the produced plurality of particle aggregates has member particles including at least a first member particle and a second member particle. Member particles of particle aggregates are optionally subjected to fusion to stabilize the particle aggregates. Produced particle aggregates having a specified number of member particles may be purified to enrich for particular aggregates.

Abstract: Particles having a non-uniform property, such as non-uniform charge, can be used to form complex yet controlled particle assemblies. In one method of fabrication, particles are located on a substrate, and a surface treatment applied to the exposed portion of the particle surface. The surface treatment modifies the particle properties within the exposed portion. One or more lithographed regions are not exposed to the surface treatment, providing spatial selectivity in inter-particle bonding after the particles are removed from the substrate.

Abstract: Particles having a non-uniform property, such as non-uniform charge, can be used to form complex yet controlled particle assemblies. In one method of fabrication, particles are located on a substrate, and a surface treatment applied to the exposed portion of the particle surface. The surface treatment modifies the particle properties within the exposed portion. One or more lithographed regions are not exposed to the surface treatment, providing spatial selectivity in inter-particle bonding after the particles are removed from the substrate.

Abstract: Methods of producing a plurality of particle aggregates having a specified number of member particles are provided according to embodiments of the present invention. Specific methods include stimulating a plurality of particles with an aggregation stimulus to form a plurality of particle aggregates and then quenching the aggregation stimulus in order to inhibit further particle aggregation. An individual particle aggregate of the produced plurality of particle aggregates has member particles including at least a first member particle and a second member particle. Member particles of particle aggregates are optionally subjected to fusion to stabilize the particle aggregates. Produced particle aggregates having a specified number of member particles may be purified to enrich for particular aggregates.