Figure 5.

Buckling wavelength, λ, plotted against the number, N, of filaments in a bundle. Lines for different coupling parameters, γ, are depicted. Their intercepts are defined by the persistence length of one filament (L_PF = 0.78 μm) and the elastic modulus of the surrounding matrix (E_SM = 1.5 kPa). The range between 0.75 and 2.5 kPa is shown by the colored regions around the coupling-parameter lines. Error bars for N correspond to an error of 5 nm in bundle thickness. To see this figure in color, go online.