
435Magnetic Nanosensors
GMR sensor A
GMR sensor B
GMR sensor C
GMR sensor D
GMR sensor A
(reference)
GMR sensor B
(positive)
GMR sensor C
(neutral)
GMR sensor D
(negative)
GMR sensor A
(reference)
GMR sensor B
(positive)
GMR sensor C
(neutral)
GMR sensor D
(negative)
Covered Bare surface IFN-γ IL6-SR
(b)
No adsorption
High specific
adsorption
High non-specific
adsorption
(a)
IFN-γ
IL6-SR
Biotin
Anti-IFN-γ
Biotinylated-anti-IFN-γ
(c)
(d)
Low non-specific
adsorption
GMR sensor A
(reference)
GMR sensor B
(positive)
GMR sensor C
(neutral)
GMR sensor D
(negative)
Low non-specific
adsorption
No signal Large signal Large signal Small signal
Streptavidin-coated magnetic nanoparticles
FIGURE 7 ...