Beyond its capabilities for in-situ monitoring, iSCAT also holds much promise as a tool for ex-situ characterization of particle morphology due to its fast data collection, low cost, simple sample preparation, and high throughput. Additionally, this technique can be implemented using simple commercially available optical components compatible with fluorescence mi-croscopy. However, iSCAT is not without limitations: Microscopy limits the field of view in any single image (20 × 20 µm in our setup), requiring parallelization or surface scanning to monitor the growth of larger numbers of particles simultaneously. iSCAT also requires a reference light-field and thus is limited to studies at or near a surface. We note that here we saw no difference in kinetics between platelets grown in solution and those growing in-situ at the coverslip surface. However, the presence of this surface is inevitably different at some level from growth conditions in the bulk solution. Nevertheless, confocal variants of iSCAT hold the potential for 3D imaging much deeper into the sample solution. Here we have focused on 2D CDSA, but the interferometric nature of iSCAT also embeds axial information; enabling, for example, the measurement of nanoparticle axial position and size. Consequently, we envisage iSCAT might also be applied to profiling more complex CDSA processes, with three-dimensional shape at high spatio-temporal resolution. directly from a drying and degassing inert solvent tower system. Aminochloromaleimide (ACM) fluorescent dye was synthesized via the method reported previously. Polymer synthesis and characterization