Figure 3
From: Chemical vs. mechanical microstructure evolution in drying colloid and polymer coatings
Concentration profile of SiO2 microspheres in SiO2-PEO mixtures as a function of normalized drying time t/tf. The mixture has initial SiO2 volume fraction ϕ0 = 0.05 and PEO weight fraction (a) wPEO = 0.05 at pH 7.5, (b) wPEO = 0.10 at pH 7.5, (c) wPEO = 0.05 at pH 2.5, and (d) wPEO = 0.10 at pH 2.5. Height indicates a distance from the substrate. A change in SiO2 volume fraction, ϕSiO2, during drying is represented as a colour scale. The depth of reduced confidence in particle location due to a mismatch of refractive index is indicated in blue.
