Fabrication of Nanostructured Polyamic Acid Membranes for Antimicrobially Enhanced Water Purification

Figure 7

Scanning Electron Microscopy (SEM) images of thermally cured phase inverted PAA films: The insets are the recorded pictures of PAA films. (a) SEM image of the PAA film at magnifications of 40000x. (b) SEM image of the Ag-PAA film at magnifications of 40000x. Surface of the Ag-PAA film is with well-dispersed silver nanoparticles showing spherical shapes. (c) SEM image of the Au/Ag-PAA film at magnifications of 20000x. Surface of the Au/Ag-PAA film is with different nanoparticles. The circled part shows gold and silver nanoparticles in close proximity.

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