Figure 3From: Fluorescent carbon dots as an efficient siRNA nanocarrier for its interference therapy in gastric cancer cells XPS spectra of the Cdots. (a) Survey spectrum of the Cdots with three major peaks of carbon, oxygen, and nitrogen. XPS high resolution survey spectra of (b) C1s, (c) O1s, and (d) N1s region of Cdots.Back to article page