Rapid virus detection using magnetic second harmonics of superparamagnetic iron oxide nanoparticles

Virus detection methods based on nonlinear magnetic response of nanoparticles have been investigated, and using the third harmonic are widely applied, owing to their high sensitivity short measurement time. This paper proposes a virus method second because its larger signal component. We found that is superior for small nanobeads large change in signal-to-noise ratio (SNR) with concentration. In addition, limit 100 pg/ml achieved. Therefore, proposed can potentially be utilized rapid screening viruses.