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. Author manuscript; available in PMC: 2021 Mar 29.
Published in final edited form as: Langmuir. 2019 May 14;35(21):7043–7049. doi: 10.1021/acs.langmuir.9b00184

Figure 3.

Figure 3.

PCA of the SERS images from a 120 h PA14 wt pellicle biofilm. (a,b) are PC1 and PC2 loading plots produced from the SERS image. Significant features at 1355, 1511, and 1603 cm−1 are marked with dashed vertical lines. (c,d) Heat maps of PC1 and PC2, respectively. The images in (c,d) are 10 μm X 10 μm.