Figure 4
Peak distributions at (a) 1042 cm−1, (b) 1425 cm−1, (c) 1460 cm−1 and (d) 1626 cm−1, with and without the MIR-FEL irradiation at 5.8 µm on the surfaces of GSM122841 (upper) and YPM221210 (lower). The colour categories are the same as Fig. 3. |