Optical detection of the magnetophoretic transport of superparamagnetic beads on a micromagnetic array.

ABSTRACT: Micromagnetic arrays (MMAs) have proven to be powerful tools for controlling the transport and separation of bioanalytes, i.e., they allow bioanalyte-superparamagnetic (SPM) bead complexes of specific size and magnetization to be moved in a synchronized manner that is precisely controlled with the orientation of an external magnetic field. This article presents a laser-photodetector system for the simple detection of individual SPM beads moving on a specific region of an MMA. This system detects the SPM beads through the change in intensity of reflective light as they move from the highly reflective micromagnetics to the supporting substrate. We demonstrate that this opti-MMA system allowed the size, number, and magnetic and optical properties of the SPM beads to be rapidly determined for

SUBMITTER: Gandhi D 

PROVIDER: S-EPMC7392889 | biostudies-literature | 2020 Jul

REPOSITORIES: biostudies-literature