A detailed account of the chemicals, synthesis and characterization methods, as well as equipment used and metrics reported is provided in section S1 in Supporting Information (SI). A specific focus is given to the compliance with the principles of Green Chemistry and Sustainability in the related methodology. In particular, the metrics retrieved from UVvis are detailed in SI and the positive correlation between UV-vis and electron microscopy data is assessed and discussed in section S2. Examples of scanning transmission electron microscopy (STEM) micrographs as reported in Figure and confirm the successful formation of NPs.