Quantifying and dispensing of magnetic particles in a self-assembled magnetic particle array

We develop a low-cost, mass-production process for creating rod-shaped glass-coated magnetic particles consisting of a magnetic metal core and glass shell structure. We investigate their magnetic properties by analyzing their optical absorbance in suspension as a function of the orientation of a 1 mT magnetic field. From the response we derive that the magnetization of the particles is 0.1 MA/m. We demonstrate an automated system that quantifies and dispenses a large amount of RGMPs by magnetic self-assembly on a high-volume plate patterned with an array of holes. This automatic dispenser can provide packaging forms with the smallest unit of RGMPs for in-vitro diagnostics and is expected to reduce the time and effort required for the assembly and packaging process.

Automated summary

A low-cost, mass-production process was developed to create rod-shaped glass-coated magnetic particles with magnetic metal core and glass shell structure. The magnetic properties of these particles were investigated by analyzing their optical absorbance in suspension. An automated system was demonstrated to quantify and dispense a large amount of these particles, reducing time and effort required for the assembly and packaging process.