Fig. 4. (Color online) Phase and z-height AFM images (1 × 1 μm​2) for pristine (a,b), 0.1 M (c,d), 1.0 M (e,f), 5.0 M (g,h), 9.2 M (i,j), and 18.4 M (k,l).

New Phys.: Sae Mulli 2025;75:108~113 https://doi.org/10.3938/NPSM.75.108

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