Figure 3: Nanomechanical maps of a polymer blend.
(a) Map of Δf1(x,y). The image has been recorded by changing the main feedback approximately every 450 nm in the slow scanning direction (scale bar, 750 nm). (b) Map of Δf2(x,y). The changes in Δf2 reflect both the changes in the elastic response of the blend and the changes of the main feedback (scale bar, 750 nm). (c) Map of ΔF01(x,y). The map shows the changes in the driving force of mode 1 to compensate the instantaneous changes in A1 while imaging (scale bar, 750 nm). (d) Map of ΔF02(x,y). The map shows the changes in the driving force of mode 2 to compensate the instantaneous changes in A2 while imaging (scale bar, 750 nm). (e).Histogram of Δf1 obtained from a. (f) Histogram of Δf2 obtained from b. (g) Histogram of ΔF01(x,y) obtained from c. (h) Histogram of ΔF01(x,y) obtained from d (i) Map of the elastic modulus across the surface. Two regions are observed. A softer region in the circles and a stiffer region in the rest of the surface. Those regions correspond, respectively, to the LDPE and PS (see histogram in m) (scale bar, 750 nm). (j) Map of the viscous coefficient. Two regions are observed. Lower damping (viscous) coefficients are found in the softer regions (LDPE) while the PS regions give higher damping coefficients (see histogram in n) (scale bar, 750 nm). (k) Map of the indentation. The indentation depends on both the elastic response and the set-point value (scale bar, 750 nm). (l) Map of the peak force (maximum force). It reproduces the trend observed in the indentation (scale bar, 750 nm). (m) Histogram of the Eeff values. The values do not depend on the feedback parameters. (n) Histogram of viscous coefficient. The values do not depend on the feedback parameters. (o) Histogram of the indentation. (p) Histogram of peak force values. The data has been recorded in 2 minutes.
