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. Author manuscript; available in PMC: 2012 Mar 9.
Published in final edited form as: Nano Lett. 2011 Jan 31;11(3):1098–1105. doi: 10.1021/nl103994w

Figure 3.

Figure 3

Predicted LSPR and SPR response. (A) Response of LSPR and SPR sensors based on a sensing volume defined by an electromagnetic (EM) field with an intensity that decays exponentially away from the nanoparticle surface. The decay length (ld) of the EM field for the LSPR sensor is 5 nm; the decay length of the SPR sensor is 200 nm. The protein length at a given conformation is defined as d; the length of the closed conformation protein is designated as d0. (B) Schematic representation of the sensing volume (red) of the SPR and LSPR sensor, where the sensing volume is taken to be 5ld.