Surface Plasmon Resonance (SPR)
Zhang et al. have shown a smartphone biosensor platform using
SPR. The disposable sensor chip utilizes the smartphone’s built in flash
as a light source and a compact diffraction grating and spectra
dispersive unit 106, but this technology is still in
development. Recent publication regarding antibiotic mediated plasmonic
biosensors for endotoxin detection have shown a low limit of detection
of 0.4 ng/ml 107.