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. Author manuscript; available in PMC: 2017 Dec 20.
Published in final edited form as: J Phys Chem C Nanomater Interfaces. 2017 Aug 22;121(36):20007–20015. doi: 10.1021/acs.jpcc.7b05169

Figure 5.

Figure 5

Effect of preformed Aβ40 oligomers on UV-Vis spectra of AuNPs. (a) UV-Vis spectra of AuNPs in the absence or presence of different amounts of preformed Aβ40 oligomers in pH 7.4 phosphate buffer measured after 1 h incubation. The spectra were normalized by setting the maximum intensity of the SPR band of the AuNP only sample to 1. (b) The SPR band intensity difference at 535 nm calculated by subtracting the UV-Vis spectrum of AuNP only sample from those of AuNP‒Aβ40 oligomer mixtures (spectra measured at 0 h and after 1 h incubation). Data are reported as means ± the standard deviation of triplicate results.