Abstract
Localized surface plasmon resonance (LSPR) biosensing holds the promise of being able to map out the spatio-temporal nature of protein secretions of individual cells or controlled drug delivery devices in a label-free manner. Before these applications can be realized, however, it first must be shown that LSPR can be used for detecting protein concentrations on length and time scales that are applicable to such mass-transport limited processes, roughly 10 μm and 1 second, respectively. In this work a quantitative analysis methodology for LSPR biosensing is presented by which surface-receptor fractional occupancy as well as the local analyte concentration can be determined to within these specifications.
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