Core/Multishell Nanoparticle Synthesis via Seeding Clusters

The patent applies preliminary action by performing multiple sequential shell deposition steps before final particle isolation. Each shell layer is grown epitaxially on the previous layer while the particles remain in solution, ensuring complete surface coverage and defect passivation occurs before any drying or powder formation. This preliminary structuring prevents quantum efficiency loss that would otherwise occur during subsequent handling and drying steps.

The patent employs parameter changes by systematically varying deposition conditions including temperature, precursor concentration, and deposition time across multiple sequential layers. Each layer is deposited under optimized parameters specific to that material system, allowing precise control over shell thickness, composition gradient, and crystalline quality. These parameter optimizations maintain high quantum efficiency through the solution-to-powder transition.

The patent applies segmentation by dividing the shell structure into multiple distinct functional layers, each with specific thickness, composition, and crystalline orientation. The inner shell layer provides lattice matching and strain management, while outer shell layers provide surface passivation and chemical stability. This segmented architecture systematically reduces surface defects and improves quantum efficiency. The modular nature of sequential deposition makes the complex process reproducible and scalable.

The patent implements nested doll by growing each shell layer epitaxially on the previous layer, with subsequent layers conformally coating and nesting around inner structures. This nested architecture ensures complete surface coverage at each level, with outer layers protecting inner layers from chemical degradation. The conformal nesting geometry maximizes surface area passivation while maintaining compact particle size, improving quantum efficiency without excessive complexity.