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. 2021 May 6;8(12):2004171. doi: 10.1002/advs.202004171

Figure 2.

Figure 2

Reaction mechanism of trimethylaluminum (Al(CH3)3, TMA) on PMIA polymer chain skeleton. Schematic illustrations of Al(CH3)3 fixed by a) —COOH/—NH2 and b) —COO−/—NH3 + through Al—O bonding on the surface of PMIA organic segment and Al(CH3)3 adsorbed over c) —COOH/—NH2 and d) —COO−/—NH3 + through Al—O bonding on the inside of PMIA organic segment. Microscopic topography and composition of the bare PMIA and the ALD‐coated PMIA. e,f) Field emission scanning electron microscopy (FESEM) images of the PMIA at different magnifications and the corresponding EDX curves; g,h) FESEM images of the PMIA–200Al2O3–800TiO2 at different magnifications and the corresponding EDX curves; i,j) TEM image of a cross‐sectional view of the interfacial region and the corresponding mapping of the PMIA–200Al2O3–800TiO2, respectively.