Nanoparticles are classified as having at least one of its dimensions in the range of 1-100 nanometers. The small size of nanoparticles allows them to have unique characteristics which may not be poss
Transmission electron microscopy image of an iron oxide nanoparticle. Regularly arranged dots within the dashed border are columns of Fe atoms. Left inset is the corresponding electron diffraction pattern. Scale bar: 10 nm.
Iron oxide nanoparticles can be dispersed in an organic solvent (toluene). Upon its evaporation, they may self-assemble (left and right panels) into micron-sized mesocrystals (center) or multilayers (right). Each dot in the left image is a traditional "atomic" crystal shown in the image above. Scale bars: 100 nm (left), 25 μm (center), 50 nm (right).
Self-assembly of solid nanoparticles at oil-water interface.
Icosahedral twins
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An icosahedral twin is an atomic structure found in atomic clusters and also nanoparticles with some thousands of atoms. Their atomic structure is slightly different from what is found for bulk materi
Electron micrograph of two icosahedral adenoviruses, with an illustration to show the shape
Shapes for different surface energies as indicated and described in the text