Critical Issues in Localized Plasmon Sensing

What is it about?

In this invited Feature Article, we reviewed several topics in LSPR sensing with relation to our own work. We chose topics we felt were under-covered in previous reviews, but that are of critical importance to the field. We discussed the spatial response, attempts by our group and others to measure it, and its importance to constructing optimal sensors; sensing modes, that is, reflection and transmission geometries; comparisons to other sensing methods; sandwich configurations (e.g., attaching small NPs to the analyte, after it binds to the NP film); and alternative plasmonic materials, such as copper. We also analyzed data from a paper measuring the decay length of Au nanorods of different shapes and sizes, and found a possibly-linear correlation between decay length and RIS (bulk sensitivity), in agreement with our earlier findings.

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