Gold nanoplatelets are a type of nanomaterial, which means, that at least one of their dimensions is smaller than 100 nm. Colloids of gold nanoparticles appear different than what we would expect because of localised surface plasmon resonance, as their color is between red and blue instead of gold. With red color, we expect more spherical particles and with blue color more plate-like particles. Gold nanoplates form because of a twinning defect on the {1,1,1} facet. We explored the possible synthesis paths and different reducing agents with the goal of achieving the highest possible yield of nanoplatelets. While literature described the highest yield at the synthesis with iodide ions and ascorbic acid, the only process, that produced a non-negligible yieldn of nanoplates was light-induced synthesis. We also attempted to combine gold nanoplates with silver nanoplates, which was unsuccessful.
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