Integrating waveguide biosensor.

  title={Integrating waveguide biosensor.},
  author={Frances S. Ligler and Marc A Breimer and J. P. Golden and Delana A Nivens and James P Dodson and Tiffanee M Green and Daniel P Haders and Omowunmi A. Sadik},
  journal={Analytical chemistry},
  volume={74 3},
A capillary biosensor is demonstrated which uses the waveguiding properties of the capillary to integrate the signal over an increased surface area without simultaneously increasing the background noise from the detector. This biosensor achieves limits of detection of 30-50 pg/mL in immunoassays using a diode laser for excitation and a PMT for detection. This is approximately 2 orders of magnitude greater sensitivity than was achieved using the same immunoassay reagents in a fiber optic… CONTINUE READING