Research Article

Improving SERS Detection of Bacillus thuringiensis Using Silver Nanoparticles Reduced with Hydroxylamine and with Citrate Capped Borohydride

Figure 4

Enhanced Raman spectra of Bt and Ag-NPs: (a) Spectrum of Bt suspended in 0.1 M NaCl at 15 hr of bacterial growth in contact with citrate capped borohydride reduced Ag-NPs; (b) Spectrum of Bt using chloride anion (1.0 M, NaCl) as aggregation agent for Ag-NPs; (c) Spectrum of borohydride reduced Ag-NPs aggregated by chloride anion (1.0 M, NaCl) without microorganisms.
989504.fig.004a
989504.fig.004b