红外光谱中，555, 1030, 1261和1388 cm^-1处的峰位分别对应于Ti3C2自身原本骨架结构中的Ti-O-Ti, C-O 和C-OH键，3445 cm^-1处的羟基来自Ti3C2表面大量的活性基团。在多巴胺改性后，3670, 3100 cm-1和1435, 1483 cm-1处的峰位分别对应于新生成的N-H键和苯环。同时，2972, 2934 cm-1 and 1540 cm-1处的峰位对应于 -CH2 和 CC。以上结果证明了改性的成功进行。

For FTIR spectra, the peaks at 555, 1030, 1261, and 1388 cm^-1 are corresponded to Ti-O-Ti, C-O and C-OH which result from the original skeleton structure of Ti3C2. Hydroxyl groups at around 3445 cm^-1 represents abundant reactive groups on the surface of Ti3C2. After being modified by dopamine, new peaks of N-H appear at 3670, 3100 cm-1 and benzene ring appeared at 1435, 1483 cm-1, respectively. In the meanwhile, peaks at 2972, 2934 cm-1 and 1540 cm-1 attributing to -CH2 and CC, are also exhibited. These changes could be attributed to amine and catechol of dopamine.