Figure 3: SERS of A) i) B. anthracis-Sterne, ii) B. megaterium, iii) B. cereus, and iv) B. subtilis, all at 105 spores/mL, conditions: 15 min binding time, 9-min spectral acquisition; and B) Bacillus anthracis-Sterne at i) 104 and ii) 103 spores/mL, conditions: 5 min binding time, 1-min spectral acquisition. Other conditions as in Figure 2.