Figure 4.

(a) Average sphericity ($\overline{\mathrm{\Psi }}$) as a function of compression pressure. The open symbol is a value obtained at zero pressure P = 0. (b) Microgel sphericity (Ψ) as a function of microgel diameter (d) for a single compression pressure (10 kPa). Black circles are binned data. Bin width is 2 and the values within each bin were averaged. Confocal images of a single microgel at (c) zero pressure, (d) at P = 10 kPa and (e) 2 MPa. Red outlines correspond to the edges of the particle after image analysis. Scale bars denote 5 μm.