Label-Free Detection of Human Serum Using Surface-Enhanced Raman Spectroscopy Based on Highly Branched Gold Nanoparticle Substrates for Discrimination of Non-Small Cell Lung Cancer

Figure 6

Difference spectra among the four groups were computed: (a) healthy subjects–large cell lung cancer, (b) healthy subjects–lung squamous carcinoma, (c) healthy subjects–lung adenocarcinoma, (d) lung adenocarcinoma–lung squamous carcinoma, (e) lung adenocarcinoma–large cell lung cancer, and (f) lung squamous carcinoma–large cell lung cancer.

(a)

(b)

(c)

(d)

(e)

(f)