Figure 1
Structure and characteristics of the AuOA sheet. (a) TEM images of the AuOA NP sheet; the diameter of the gold core was ca. 12.6 nm and the gap distance was ca. 2.6 nm on average. (b) Intensity of the optical field under the influence of LSPR and SET. The black line corresponds to the LSPR field intensity excited on the AuOA sheet calculated by FDTD simulation, and the light blue line corresponds to the evanescent field excited under the TIR condition at the glass/water interface (incident angle: 65°) calculated by Fresnel simulation. The colored dashed lines present the fluorescence attenuation factor due to SET with various SET distances (=d 0 ). The colored solid lines marked as ‘LSPR × SET’ are the LSPR field intensity obtained as the products of LSPR and SET. (c) Model of the AuOA sheet for the calculation. The data in (b) were obtained on line D, where the center position of the adjacent particles was set to D = 0. The attenuation factor by SET at each D position was calculated based on the distance to the closest particle surface (e.g., at the position of D = y, the ‘SET’ value was calculated based on the distance of d = x).
