Fig. 2. Particle size distribution of spray-dried and ALD-coated spray-dried particles as measured by flow imaging microscopy for particles with varying numbers of ALD-alumina coats.

Left to right in each group of bars: Spray-dried, no coating (blue), 100 ALD cycles (red); 250 cycles, (green); 500 cycles (purple). Size distribution of the particles were estimated using the estimated spherical diameter (ESD) values returned by VisualSpreadsheet for each particle.