Year: 2020
Type: book-chapter
Abstract: This chapter develops a new method based upon the density difference between two layers of solvents to control nanoparticle superlattice formation and growth. Nanoparticles are becoming to nanotechnologists what atoms are to chemists, and many methods have emerged for assembling them into periodic and highly crystalline structures. The density barrier moves upward over the crystallization process, a consequence of the decrease in osmotic pressure in the top layer, as the programmable atom equivalent (PAE) crystallize and sediment. This effect is especially pronounced when superlattice assembly and purification are studied as a function of initial PAE concentration. Microcrystal size characterization was carried out via scanning electron microscopy (SEM). The samples were then imaged by SEM considering various orientations of the rhombic dodecahedra and their projection angles. Small angle X-ray scattering experiments were conducted at the Advanced Photon Source to confirm the lattice symmetries and to determine the interparticle spacing of the nanoparticles in the superlattices.
Source: Spherical Nucleic Acids
Institution: Northwestern University
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W4249446277