Figure 4.

Height (a) and phase (a') images of the blended film. Taken with a softer tip cantilever with a spring constant of 3 N/m at A0 = 60 nm and rsp = 0.5. The scanning size is 500 nm × 500 nm.

Li et al. Nanoscale Research Letters 2012 7:153   doi:10.1186/1556-276X-7-153
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