DocumentCode :
1449290
Title :
Label-Free Biosensor Arrays Based on Silicon Ring Resonators and High-Speed Optical Scanning Instrumentation
Author :
Iqbal, Muzammil ; Gleeson, Martin A. ; Spaugh, Bradley ; Tybor, Frank ; Gunn, William G. ; Hochberg, Michael ; Baehr-Jones, Tom ; Bailey, Ryan C. ; Gunn, L. Cary
Author_Institution :
Genalyte, Inc., San Diego, CA, USA
Volume :
16
Issue :
3
fYear :
2010
Firstpage :
654
Lastpage :
661
Abstract :
A platform for performing rapid, real-time binding assays on sensor arrays based on silicon ring resonators is presented in this paper. An array of 32 sensors is interrogated simultaneously. Using eight sensors as controls, 24 simultaneous binding curves are produced. The bulk refractive index sensitivity of the system was demonstrated down to 7.6 × 10-7 and sensor-to-sensor variability is 3.9%. Using an 8-min incubation, real-time binding was observed over 8-logs of concentration down to 60 fM using immobilized biotin to capture streptavidin diluted in bovine serum albumin solution. Multiplexing in complex media is demonstrated with two DNA oligonucleotide probes. Time to result and repeatability are demonstrated to be adequate for clinical applications.
Keywords :
DNA; bioMEMS; biosensors; microcavity lasers; microfluidics; microsensors; molecular biophysics; sensor arrays; silicon-on-insulator; DNA oligonucleotide probes; binding curves; bovine serum albumin solution; bulk refractive index sensitivity; high speed optical scanning instrumentation; immobilized biotin; label free biosensor arrays; multiplexing; rapid real time binding assays; silicon ring resonators; streptavidin capture; Refractometric sensor; optical biosensing; resonant cavity sensors; ring resonator sensor;
fLanguage :
English
Journal_Title :
Selected Topics in Quantum Electronics, IEEE Journal of
Publisher :
ieee
ISSN :
1077-260X
Type :
jour
DOI :
10.1109/JSTQE.2009.2032510
Filename :
5437305
Link To Document :
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