Mesocrystals are a class of materials that are characterized by the ordered arrangement of nanoscale building blocks, typically formed by the self-assembly of nanoparticles. Unlike traditional crystals, which have a periodic arrangement of atoms or molecules throughout their entire structure, mesocrystals exhibit a hierarchical organization. This means that they consist of smaller crystallites or nanoparticles that are themselves ordered, but the overall arrangement can exhibit different properties compared to a single crystalline solid.
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