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 1

(a) Low and (b) high magnification SEM images of the HGNPs. (c) TEM images and (d) high-resolution TEM images of the HGNPs. (e) SAED pattern and (f) UV-vis-NIR absorption spectrum of the HGNPs. (g) SERS spectra of (black curve) 4-MBA and (red curve) HGNP colloidal dispersion mixed with 4-MBA under 785 nm excitation.

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