1 nm-Resolution Sorting of Sub-10 nm Nanoparticles Using a Dielectric Metasurface with Toroidal Responses.

ABSTRACT: Sorting nanoparticles is of paramount importance in numerous physical, chemical, and biomedical applications. Current technologies for sorting dielectric nanoparticles have a common size limit and resolution approximately of 20 and 10 nm, respectively. It remains a grand challenge to push the limit. Herein, the new physics that deploys toroidal and multipole responses in a dielectric metasurface to exert strong and distinguishable optical forces on sub-10 nm nanoparticles is unravelled. The electric toroidal dipole, electric dipole, and quadrupole emerge with distinct light and force patterns, which can be leveraged to promise unprecedented high-precision manipulations, such as sorting sub-10 nm polystyrene nanoparticles at 1 nm resolution, sorting 20 nm proteins/exsomes at 3 nm resolution

SUBMITTER: Luo H 

PROVIDER: S-EPMC11935857 | biostudies-literature | 2023 Sep

REPOSITORIES: biostudies-literature