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. 2015 Aug 17;5:13166. doi: 10.1038/srep13166

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(a–d) The addition of the nonadsorbing PS polymer effectively prevented crack formation in the dried colloidal drops with r_S ~ 100 nm, ϕ₀ ~ 0.1, and R₀ ~ 1.4 mm, as the concentration increased from C_p = 0 to 4.0 mg/ml. In particular, almost all cracks were removed in (d), for C_p = 4.0 mg/ml (Supplementary Movie 2). The total crack density (e) and the total crack length (f), determined from (a–d), provide quantitative evidence for the gelation-mediated crack prevention.