Figure 2:

(A) Schematic of a label-free assay utilizing silver colloidal nanoparticles for the detection of proteins via electrostatic aggregation of Ag NPs in the presence of the protein. (B) Example of Raman spectrum of serum albumin using label-free colloidal SERS in the detection of colorectal cancer. (C) Scatter plot of the linear discriminant scores belonging to the normal and colorectal cancer group, calculated from the datasets of albumin. Reprinted with copyright permission from [144], Copyright 2014 Journal of Photonics SPIE.

© De Gruyter