Quantification of magnetic nanobeads with micrometer Hall sensors

This paper investigates the suitability of miniaturized semiconductor Hall devices for the quantification of magnetic nanobeads usable in biomedical applications. The analysis demonstrates the existence of conditions for which the Hall voltage signal is not proportional to bead number, focusing on the detection of a 2D array of superparamagnetic nanobeads, immobilized on the sensor surface. The st...