Figure 6
(A) UV-vis spectra of Au NRs@SiO2 after reaction with different concentrations (from 0 to 0.5 × 106 CFU) of E. coli O157:H7 in the 0.01 M PBS solutions (pH = 7.4); (B) Linearity curve for the plot of plasmon shift vs. the logarithm of concentration of E. coli O157:H7 (n = 1, 2, 3, 4, 5, 6).
