Figure 1

Scanning electron microscopy (SEM), transmission electron microscopy(TEM), nano-IR and FTIR spectra of the ALG. (a,b) are the SEM images; (c) is laser grain size distribution; (d,e) are the TEM images; (f) is the corresponding nano-IR spectrum of the blue spot in heigh image (f1) and phase image (f2); (g) the FTIR spectrum of the GAP.