Research on the Targeted Treatment of Squamous Cell Carcinoma by Nanographene Drug Delivery System

Figure 2

FTIR spectra of NGO and NGO-PEG (left), and FTIR spectra of NGO-PEG and NGO-PEG-BPEI (right). (a) The absorption peaks of NGO are 3377 cm⁻¹ and 1730 cm⁻¹, and the absorption peaks of NGO-PEG are 3375 cm⁻¹, 1653 cm⁻¹, 2874 cm⁻¹, and 1099 cm⁻¹; (b) the absorption peaks of NGO-PEG are 3375 cm⁻¹, 1653 cm⁻¹, 2874 cm⁻¹, and 1099 cm⁻¹, and the absorption peaks of NGO-PEG-BPEI are 3370 cm⁻¹, 3248 cm⁻¹, 2927 cm⁻¹, 1623 cm⁻¹, and 1095 cm⁻¹.

(a)

(b)