Skip to main content
. 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 4.

Figure 4.

PCA of the SERS images from a 48 h FRD1 pellicle biofilm. (a,b) PC1 and PC2 loading plots produced from the SERS image. Significant features at 1351, 1560, and 1627 cm−1 in the PC1 loading plot are marked with dashed vertical lines. (c,d) Heat maps of PC1 and PC2, respectively. The images in (c,d) are 15 μm X 15 μm.