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. 2009 May 6;96(9):3781–3790. doi: 10.1016/j.bpj.2009.01.044

Figure 1.

Figure 1

Dilation of lateral particle dimension during AFM imaging. Finite size of AFM scanning tips (shown here as parabola) increases apparent width Wapp of particles well beyond their actual width W. For an ellipse, W can be derived using the measured height H and Wapp of the particle and the tip radius Rt (25).