Similar results have been observed previously, attributing the increased final size to the solubilization of the seeds themselves at high THF content. This solubilization leads to a decrease in crystalline nuclei, thereby providing an additional source of unimers for remaining nuclei. Alongside measurements of growth kinetics based on platelet area, the impact of unimer, seed, and solvent variation on the platelet morphology was also examined. Figs. show the time evolution of the platelet aspect ratio (L 1 :L 2 ). Figs. show the underlying changes in long (L 1 ) and short (L 2 ) axis lengths with experimental conditions. Both unimer and seed concentrations had little impact on the platelet shape during assembly. Conversely, alterations in the THF content in the system (from 0 to 5%) significantly impacted platelet shape. While the platelet aspect ratio (L 1 :L 2 ) remained relatively constant during platelet formation for a particular THF concentration (Fig. ), an increased THF content led to a more pronounced preference for unimer addition along the longer axis (L 1 ), resulting in the formation of elongated platelets as illustrated in Figs. 4I & S14. However, the mechanism leading to this asymmetry remains unknown and warrants further study.