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On the nanometer scale, size reduction effects affect materials properties. Au and Ag nanoparticles are interesting cases owing to a structural transition that occurs at nanometric sizes; this has been explored, for example, to change material properties. Here, we present structural studies on dodecanethiol-capped Au and Ag colloidal nanoparticles synthesized at room temperature and 80 °C. For the...
In this work particles of ZnO of size range 33–56 Å were prepared by a sol–gel method. The effect of reaction time on the particle size of ZnO or ZnO:Ce was investigated by transmission electron microscopy measurements, UV–vis absorption and luminescence spectroscopy. A linear increase of the mean particle size is observed as a function of reaction time. The cerium-doped particles are bigger than...
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