Characterization. Particles were imaged using a JEOL 1400F TEM using a 120 kV acceleration voltage. Dip-coated particle films were imaged using a JEOL JSM 6700F SEM using a 10 kV acceleration voltage using a SEI detector at a working distance of 6 mm. Images of films were then segmented using the Trainable Weka Segmentation ImageJ plugin. Viscosities were measured using a TA Instruments AR2000 rheometer equipped with a 60 mm cone plan geometry.