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 60fM 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.
Original language | English (US) |
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Article number | 5437305 |
Pages (from-to) | 654-661 |
Number of pages | 8 |
Journal | IEEE Journal on Selected Topics in Quantum Electronics |
Volume | 16 |
Issue number | 3 |
DOIs | |
State | Published - May 2010 |
Keywords
- Optical biosensing
- Refractometric sensor
- Resonant cavity sensors
- Ring resonator sensor
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Electrical and Electronic Engineering