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. Author manuscript; available in PMC: 2024 Jan 5.
Published in final edited form as: Adv Mater Interfaces. 2022 Nov 27;10(1):2201261. doi: 10.1002/admi.202201261

Figure 2.

Figure 2.

a) Absorption spectrum of AuNMs before (blue) and after (red) the coating of 40 nm AuNPs. b) Wavelength shift of the AuNPs (1.1 nm) coated AuNMs with a diameter ranging from 4 to 200 nm (one-way ANOVA MATLAB R2019b, n = 3, P = 1.32e-06). c) The wavelength shift of different AuNPs coatings (1.1 nm, 40 nm) (one-way ANOVA MATLAB R2019b, n = 3, P = 1.22e-05). Bare AuNPs were prepared in DI water and citrate solutions, respectively, whereas the streptavidin-coated AuNPs were suspended in DI water. d) Wavelength shift on GNM substrate versus 40 nm AuNPs with different concentration (one-way ANOVA MATLAB R2019b, n = 3, P = 0.0005).