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A clinically relevant magneto‐optical technique (fd‐FRS, frequency‐domain Faraday rotation spectroscopy) for characterizing proteins using antibody‐functionalized magnetic nanoparticles (MNPs) is demonstrated. This technique distinguishes between the Faraday rotation of the solvent, iron oxide core, and functionalization layers of polyethylene glycol polymers (spacer) and model antibody–antigen complexes...
In article number 1602862, Shawn A. Putnam and co‐workers, revisiting a 170 year old magneto‐optical phenomenon, reveal a fast, sensitive, and versatile medical test. Polarized light interacts with functionalized magnetic nanoparticles in the biomolecule characterization method called fd‐FRS (frequency‐domain Faraday Rotation Spectroscopy). Alternating magnetic fields induce particle rotation and...
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