Assembly Control at a Low Peclet Number in Ultracentrifugation for Uniformly Sized Nanoparticles.

ABSTRACT: The intrinsic high diffusion rate of colloids at low Péclet number results in an extremely fast crystallization process and instant formation of colloidal crystals, even at an ultracentrifugal field of extremely high intensity. By introducing a small number of clusters in sedimention, it should be possible to slow down the crystallization process, thus making the assembly order tunable in preparative ultracentrifugation experiments. Here, we used sodium dodecyl sulfate-stabilized polystyrene nanoparticles (with a size dispersity of 1.07) dispersed in a solution of high ionic strength. Sedimentation and assembly of these nanoparticles were done using preparative ultracentrifugation at various angular velocities. The sedimentation process was also analyzed in situ by analytical ultracentrifu

SUBMITTER: Xu X 

PROVIDER: S-EPMC8168913 | biostudies-literature | 2021 Apr

REPOSITORIES: biostudies-literature