Figure 2.

AFM images (a–o) show PS-b-P2VP films of varying thicknesses annealed in 2:1 chloroform/THF vapor up to a range of solvent concentration (ϕ_s) values. All scale bars are 1 μm. Once the targeted value of ϕ_s was reached, the films were held at this value for approximately 200 s before being rapidly quenched in order to preserve the phase-separated structure. (p) Examples of solvent uptake plots for (k–n) during SVA, with the corresponding ϕ_s value shown in the inset that the film was held at for 200 s. (q) is an orientation diagram of the swollen film thickness D_sw as a function of ϕ_s, with the color of each data point conveying the resulting morphology of the film post-SVA.