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. 2018 Aug 3;4(8):eaap8045. doi: 10.1126/sciadv.aap8045

Fig. 5. Distinguishing the stiffness of NCPS monolayers in solid- and liquid-like states at a liquid-liquid interface using in situ AFM.

Fig. 5

(A) Schematic diagram of the in situ AFM experimental setup. (B) Force (F) curves measured for NCPS films at the DMF–silicone oil interface in the absence and in the presence of zwitterionic ligand 1 confirm that solid-like NCPS films are stiffer than liquid-like films. The distinctive mechanical properties observed for solid- and liquid-like states were concomitant with differentiated morphologies for NCPS films at the DMF–silicone oil interface in the absence (C) and in the presence (D) of zwitterionic ligand 1. Scale bars, 200 nm; z range color scale, 100 nm.