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. Author manuscript; available in PMC: 2014 Mar 1.
Published in final edited form as: Mater Sci Eng R Rep. 2013 Mar;74(3):35–69. doi: 10.1016/j.mser.2013.03.001

Fig. 8.

Fig. 8

Magnetic nanoparticle-based biosensors. (a) Schematic representation of antibody–antigen binding on the GMR sensor surface. (b) Optical micrograph showing the GMR sensor architecture. Inset: SEM image of one stripe of the GMR sensor that is bound with magnetic nanoparticle tags. (c) Schematic representation of a magnetically labeled antibody, drawn to scale. (d) Visualization of CEA protein surface concentration at different times using a high-density GMR sensor array. Reprinted with permission from ref. [184].