Correlation Engine 2.0
Clear Search sequence regions


We demonstrate the detection of dissolved avidin concentrations as low as 15 nM or 1 μg/ml using functionalized slotted photonic crystal cavities with integrated microfluidics. With a cavity sensing surface area of approximately 2.2 μm(2), we are able to detect surface mass densities of order 60 pg/mm(2) corresponding to a bound mass of approximately 100 ag. The ultra-compact size of the sensors makes them attractive for lab-on-a-chip applications where high densities of independent sensing elements are desired within a small area. The high sensitivity over an extremely small area is due to the strong modal overlap with the analyte enabled by the slotted waveguide cavity geometry that we employ. This strong overlap results in larger shifts in the cavity peak wavelength when compared to competing approaches. Copyright © 2011 Elsevier B.V. All rights reserved.

Citation

M G Scullion, A Di Falco, T F Krauss. Slotted photonic crystal cavities with integrated microfluidics for biosensing applications. Biosensors & bioelectronics. 2011 Sep 15;27(1):101-5

Expand section icon Mesh Tags

Expand section icon Substances


PMID: 21764290

View Full Text