Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
741796 | Sensors and Actuators B: Chemical | 2007 | 8 Pages |
Abstract
We describe the resonance wavelength-dependent signal of absorptive particles in surface plasmon resonance (SPR)-based detection using both modeling and experimental results. The particles, gold nanocages, have a significant absorption cross-section in the near-infrared (NIR), resulting in a wavelength-dependent refractive index as measured by SPR. The SPR signal due to the nanocages varies by four-fold over resonance wavelengths from 650 nm to 950 nm. The greatest SPR signal occurs at the longest resonance wavelengths; its magnitude is due to the inherent increase in sensitivity of SPR on gold with increasing wavelength and the optical absorption properties of the nanocages.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Elain Fu, Stephen A. Ramsey, Jingyi Chen, Timothy M. Chinowsky, Benjamin Wiley, Younan Xia, Paul Yager,